CN113079958B - Karst region rock soil contact surface soil leakage resistance control method - Google Patents
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
- A01G17/005—Cultivation methods
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/60—Flowers; Ornamental plants
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Abstract
The invention relates to a method for controlling soil leakage of a rock-soil contact surface in a karst region. The karst region rock-soil contact surface soil leakage resistance control method comprises the following steps of planting plants in the karst region rock-soil contact surface soil, wherein the plant measures are distributed as follows: taking bare rock in a karst region as a center, and dividing the periphery of the bare rock into 4 plant measure implementation and layout areas of an ascending position, a descending position, a left slope position and a right slope position; planting herbaceous plants in the area close to the bare rock and surrounding the bare rock for a circle; planting creeping lianas on the slope of bare rock and outside the herbaceous plant; and planting fast-growing plant hedges at the downslope position, the left slope position and the right slope position of the bare rock, which are close to the outer side of the herbaceous plant, and at the upslope position of the bare rock, which is close to the outer side of the liana. The method is suitable for controlling the soil leakage resistance of the rock-soil contact surface around the bare rock in the karst region, and can promote the rock desertification control and water and soil conservation in the southwest rock karst region.
Description
Technical Field
The invention relates to a water and soil conservation technology, in particular to a karst region bare rock and soil contact surface soil leakage resistance control method, which is suitable for rock and soil contact surface water and soil loss control in the karst region and vegetation recovery in karst rock desertification regions.
Background
The karst region has a special, complex and concealed water and soil loss, the karst region has a surface and underground double-layer hydrogeological structure, the water and soil loss is not only the surface loss of a slope surface, but also the loss to an underground space through a rock and soil contact surface or a water falling hole, and the soil loss is the phenomenon that under the action of hydraulic power, gravity and other forces, the soil structure is broken and loosened and migrates with water flow into underground cracks, pipelines or underground rivers to cause soil loss. The water and soil underground leakage is a special form of water and soil loss in karst regions, and research results show that the soil erosion in the karst regions is mainly the underground leakage, the underground leakage modulus accounts for 70-80% of the annual total soil erosion modulus, and at present, most of stony desertification control technologies mainly aim at preventing and treating the water and soil loss on the surface of the earth, so that the water and soil underground leakage is difficult to control effectively.
The karst region soil leakage treatment is a system engineering and needs a multidisciplinary technology to solve the problem. At present, the commonly used soil leakage treatment technology in karst regions comprises plant measures and engineering measures, the plant measures comprise slope surface water conservation forest, ridge hedgerow technology and the like, and the water conservation forest can improve the coverage of slope surface vegetation and preserve water sources; the technology of the ridge plant fence is that relatively narrow land blocks are selected at certain distances along a slope surface downwards, climbing shrubs or creeping shrubs are planted in the direction of contour lines to form a strip-shaped plant fence, surface runoff and sediment can be effectively intercepted, but water conservation forest and plant fence technologies can only reduce water and soil loss of the ground surface to a certain extent, and have limited effect on underground leakage. The engineering measures include that small water intercepting ditches are built at the joint of the exposed bedrock and the soil by using small stone pulp to intercept rock surface runoff, block a water flow passage of a rock-soil contact surface and prevent and control soil loss, but the method has the disadvantages of large construction disturbance, high cost, land occupation and poor technical and ecological functions.
Disclosure of Invention
The invention provides a karst region rock-soil contact surface soil leakage resistance control method which is suitable for soil leakage resistance control of rock-soil contact surfaces around bare rocks in a karst region and can promote rock desertification control and water and soil conservation in southwest rock karst regions.
A karst region rock-soil contact surface soil leakage resistance control method comprises the following steps of planting plants in the karst region rock-soil contact surface soil, wherein the plant measures are distributed as follows:
taking bare rock in a karst region as a center, and dividing the periphery of the bare rock into 4 plant measure implementation and layout areas of an ascending position, a descending position, a left slope position and a right slope position;
planting herbaceous plants in the area close to the bare rock and surrounding the bare rock for a circle;
planting creeping lianas on the outer side of the herbaceous plant in the upward slope of the bare rock;
the downhill path, the left side and the right side of the bare rock are close to the outside of the herbaceous plant, and the uphill path of the bare rock is close to the outside of the liana, and the fast-growing hedgerow is planted.
According to an embodiment of the present invention, the herbaceous plant is selected from one or more of the group consisting of an indigenous weed, vetiver grass, bermudagrass, and pennisetum alopecuroides.
According to the embodiment of the invention, the vine plant is one or more selected from honeysuckle, Siberian cocklebur fruit, Ficus pumila and pigeon pea.
According to an embodiment of the present invention, the fast-growing hedgerow is selected from one or more of rosa roxburghii, pyracantha fortuneana, crataegus pinnatifida and albizia julibrissin.
According to the embodiment of the invention, the bare rock in the karst region is taken as the center, the herbaceous plants are planted within 10cm of the width of the upward slope of the bare rock, the lianas are planted within 10-30cm (such as 20cm) of the width, and the fast-growing hedges are planted within 30-130cm (such as 100cm) of the width; specifically, the fast-growing hedgerow is used for planting 2 rows of shrubs, the planting distance is 15cm, and the row distance is 50 cm.
According to the embodiment of the invention, the bare rock in the karst region is taken as the center, the herbaceous plants are planted within 20cm of the left slope position and the right slope position of the bare rock, and the fast-growing hedges are planted within 20-140cm (such as 120 cm); specifically, the fast-growing hedgerow is used for planting 2 rows of shrubs, the planting distance is 20cm, and the row distance is 60 cm.
According to the embodiment of the invention, the bare rock in the karst region is taken as the center, the herbaceous plants are planted within 20cm of the downhill position of the bare rock, and the fast-growing hedges are planted within 20-160cm (such as 140 cm); specifically, the fast-growing hedgerow is used for planting 2 rows of shrubs, the planting distance is 25cm, and the row distance is 70 cm.
According to the embodiment of the invention, the karst region rock-soil contact surface soil leakage resistance control method further comprises the steps of obtaining the moisture distribution condition of the karst region rock-soil contact surface soil, and determining the plant types and the plant measure distribution layout according to the moisture distribution condition and the plant water demand characteristics.
According to the embodiment of the invention, the method also comprises the step of adding a soil water-retaining agent to the disturbed soil area of the planted plants. Wherein the water-retaining agent can be selected from Polyacrylamide (PAM), and the application amount of the water-retaining agent is 30-40kg/hm2。
The method solves the problems of poor ecological effect of traditional engineering measures, limited soil leakage effect of the soil-rock contact surface controlled by plant measures and the like, accurately determines the plant measure layout around the bare rock according to the soil moisture distribution and content characteristics of different directions around the bare rock of the karst region and the water demand characteristics of crop growth, has economic benefits and water and soil conservation benefits, and increases the vegetation coverage of the slope by climbing or creeping liana plants over the bare rock. Through the improvement of plant planting structure around the bare rock, through three-dimensional planting, the collocation of grass irrigation, adopt the developed plant of many years's root system, reduce the disturbance to soil, improve the microclimate environment around the bare rock, simultaneously, add right amount soil water-retaining agent in planting soil and carry out soil improvement, reach improvement soil, keep in the palm moisture, finally solve the soil leakage problem of karst area rock soil contact surface.
Drawings
FIG. 1 is a schematic diagram of soil leakage from rock-soil contact surface in karst region.
FIG. 2 is a schematic diagram of the distribution and layout of the vegetation measures around the bare rock according to the embodiment of the present invention.
FIG. 3 is a schematic cross-sectional view illustrating the distribution and layout of vegetation measures around bare rock according to an embodiment of the present invention.
Detailed Description
The invention provides a method for preventing and controlling soil loss of a karst region bare rock soil contact surface, and the specific solution scheme comprises soil moisture determination, plant measure layout and planting soil improvement.
The soil leakage schematic diagram of the rock-soil contact surface in the karst region is shown in figure 1.
(1) Soil moisture determination
Soil on the slope surface of the karst region is separated by bare rocks, so that the soil is discontinuously distributed, the whole slope surface is divided into a plurality of irregular soil patch + bare rock combined micro geomorphic units by the bare rocks, the bare rocks change the surrounding environment and microclimate, and a relatively independent micro hydrogeological unit is formed with the underground karst zone medium space, so that the moisture around the bare rocks has spatial heterogeneity. Experimental research shows that the surface water of soil around bare rock in karst regions is greatly imaged by the bare rock, in dry seasons, in sunny slopes as examples, the water content of soil adjacent to the north side of the bare rock is obviously higher than that of soil adjacent to other directions, and meanwhile, the water content of soil adjacent to the east and west sides of the bare rock is slightly higher than that of soil adjacent to the south side, so that before plant prevention measures are arranged around the bare rock according to the distribution characteristics of the water content of the soil in different directions around the bare rock, typical bare rock is selected firstly to obtain the change situation of the water of the soil around the bare rock in one crop growth season, and the water monitoring range comprises a range 120cm away from the bare rock and a depth of 30 cm. According to the soil moisture distribution condition monitored around the bare rock and the water demand characteristics of the plants, the plant types and the plant measure distribution are determined.
(2) Plant measure layout
Taking a sunny slope as an example, taking bare rock as a center according to the soil moisture distribution characteristics around the bare rock, dividing the periphery of the bare rock into 4 plant measure implementation and layout areas of an upward slope (north, N), a downward slope (south, S), a left slope (west, W) and a right slope (east, E), and planting arbors, shrubs and herbaceous plants respectively.
Planting herbaceous plants around the bare rock for a circle in a region close to the bare rock, wherein the herbaceous plants are selected from one or more of native weeds, vetiver grass, bermudagrass, elephantopus grass and pennisetum alopecuroides, the developed root systems of the herbaceous plants are used for retaining water and fixing soil, direct scouring of rock surface runoff and uphill runoff on soil at the root of the bare rock is reduced, and meanwhile, development of plant communities such as lichens, algae, moss and ferns at the bottom of the bare rock is promoted.
The bare rock uphill position is a shade surface, and the water content of the soil is high relative to other directions, so that the external side of the uphill position close to the herbaceous plant is planted with creeping lianas, the creeping vines cover the bare rock surface to grow, the whole bare rock is covered, the microclimate environment on the bare rock surface is improved, the effects of better shading cover and intercepting rainfall are achieved, the flow velocity of rock surface runoff is reduced, the direct scouring of the rock surface runoff on the soil is reduced, the lianas selects one or more of honeysuckle, litsea cubeba, climbing fig, pigeon pea and the like, and the economic benefit and the water conservation benefit are achieved.
The fast-growing hedges with high water utilization efficiency and strong regulation and storage functions are planted according to the soil water distribution characteristics at the positions of the downhill (south), the left (west) and the right (east) which are close to the outer sides of the herbaceous plants and the uphill (north) which is close to the outer sides of the lianas, the hedges have strong stress resistance and developed root systems, and have economic value and water and soil conservation functions, and the perennial plants are preferably selected, so that the water and soil loss caused by soil turning disturbance after planting is reduced. The fast-growing hedgerow is preferably one or more of roxburgh rose, pyracantha fortuneana, kalanchoe, albizzia julibrissin and the like, and has certain economic value.
Grass of 0-10cm, vine of 10-30cm, shrub of 2 rows planted at 30-130cm on the slope (north) of bare rock, plant spacing of 15cm and row spacing of 50 cm; 0-20m grass on the left slope (west) and the right slope (east) of bare rock, 2 rows of shrubs are planted at 20-140cm, the planting distance is 20cm, and the row distance is 60 cm; grass is planted at the downhill position of bare rock with the distance of 0-20cm, shrubs are planted at the distance of 20-160cm, and the row spacing is 25cm and 70 cm.
After the plant measures are laid, a micro ecological environment of a combination of plants, soil and bare rock is formed, a plant measure planting layout mode of hedges, vines and herbaceous plants is formed from the outer side to the inner side in a planar arrangement mode, direct washing of slope runoff on the bottoms of the bare rock is slowed down, and soil loss of a rock-soil contact surface is effectively prevented and controlled; the vertical arrangement adopts from top to bottom to form a three-dimensional planting unit of liana, bare rock, hedgerow, herbaceous plant and soil, the liana intercepts rainfall and bare rock runoff, slows down direct scouring of stone surface runoff caused by the rainfall on the bare rock bottom rock soil contact surface, and effectively prevents and controls soil loss. The invention takes bare rock as the center and soil moisture as the basis to form a soil leakage resistance control system of a rock-soil contact surface.
The schematic diagram of the distribution and layout of the vegetation measures around the bare rock in this embodiment is shown in fig. 2. The cross section of the distribution and layout of the vegetation measures around the bare rock in this embodiment is schematically shown in fig. 3.
(3) Improvement of planting soil
In karst areas, annual precipitation distribution is extremely uneven, spring rain is insufficient, heavy rain is caused in summer, and the soil is barren due to frequent drought and poor due to double-layer space on the earth surface and underground. Meanwhile, the method is influenced by rainfall and topographic features, the local agricultural irrigation condition is backward, and the cost is high, so after plant measures are implemented around the bare rock, soil water-retaining agent Polyacrylamide (PAM) is added to the disturbed soil area of the planted plants, and the application amount of the water-retaining agent is 30kg/hm2Thereby improving the water retention property and the anti-erosion capability of the planting soil and reducing the water and soil loss of the soil caused by the planting disturbance.
Example 1
In this embodiment, a detailed description is given by taking an example of the control of the soil leakage of the rock-soil contact surface of the karst slope in northwest le town of Monte city, Yunnan province.
The specific method of the embodiment comprises the following steps: determining the water distribution characteristics of soil around the bare rock, determining and distributing plant species, and adding a soil water-retaining agent.
(1) Water distribution characteristics of soil around bare rock
The distribution characteristic of soil moisture around bare rocks is a key basis for implementing plant measure layout, the bare rocks are taken as the center, soil moisture monitoring points are respectively distributed in the east, the west, the south and the north of the bare rocks, the soil moisture change condition in one crop growth season of the soil around the bare rocks is obtained, one monitoring point is distributed at intervals of 20cm from the bottom of the bare rocks to the outside in each direction, 5 monitoring points are distributed, the monitoring depth of each monitoring point is 30cm, 3 depth soil moisture values (0-10cm, 10-20cm and 20-30cm) are monitored, and the monitoring range of the soil moisture comprises a region with the bare rocks as the center and the radius of 1 m.
(2) Plant species determination and layout
In the test base of northwest Lezhen city of Mongolia city, Yunnan province, the plant species and the layout mode are as follows: 0-10cm of vetiver grass, 10-30cm of honeysuckle and 30-130cm of crataegus pinnatifida are planted at the slope (north) of bare rock, the planting distance is 15cm, and the row distance is 50 cm; 0-20m vetiver plants are planted on the left slope (west) and the right slope (east) of bare rock, 2 rows of crataegus pinnatifida are planted at 20-140cm, the plant spacing is 20cm, and the row spacing is 60 cm; 0-20m of vetiver grass on the bare rock downhill, 2 rows of calcium fruits are planted at 20-160cm, the planting distance is 25cm, and the row distance is 70 cm. The planting mode of the vetiver, the honeysuckle and the calcium fruit is formed, and the planting mode has economic benefit and water conservation benefit.
(3) Adding soil water-retaining agent
The soil water-retaining agent can rapidly absorb and retain rainwater or irrigation water in soil without loss, thereby ensuring sufficient water in the rhizosphere range and slowly releasing the water for plants to utilize. The special water absorption, water storage and water retention performances of the novel water-retaining agent can effectively improve the survival rate of plants in the initial stage of planting the plants, promote the development of soil microorganisms and improve the turnover utilization efficiency of soil organic matters. The water-retaining agent is applied to soil, and can change the surrounding soil from compact to loose and increase the pores along with the regular change of water absorption expansion and water loss contraction, thereby improving the permeability of the soil to a certain extent.
The soil water-retaining agent is selected from Polyacrylamide (PAM), powder, anionic type and average molecular weight not less than 1000 ten thousand. The water-retaining agent is applied in a mixing way, namely the water-retaining agent is uniformly mixed with a proper amount of dry fine soil and then uniformly spread around the planted plants, and then the planting soil is covered to promote the water-retaining agent to be uniformly mixedApplied to planting soil with the water-retaining agent application amount of 30kg/hm2。
(4) Soil leakage prevention and control effect
In 2018, the soil leakage resistance control method for the rock-soil contact surface is implemented in a test area (the area of the test area is 0.2 km)2) After more than 3 years of treatment and demonstration, the ecological environment of a test area is obviously improved, the vegetation coverage is improved to more than 60 percent from the original less than 30 percent, the soil erosion modulus is reduced by 47 percent, the output value of the unit area of the land is improved by nearly 30 percent, and better ecological, economic and social benefits are obtained. The results before and after the technical implementation are compared in table 1 below.
Note: the detection method of the soil erosion modulus is obtained by actually measured data of runoff plot laid on site.
TABLE 1
Compared with the prior art, the method has the main advantages that the soil leakage resistance control technology for the rock-soil contact surface of the karst region is developed according to the characteristics and the way of soil leakage of the karst region. According to the soil moisture distribution characteristics around the bare rock, the plant measure variety and the plant measure layout are determined, meanwhile, a proper amount of soil water-retaining agent is added into the planting soil to improve the soil, the developed root system and the soil conditioner of the plant are utilized to preserve moisture and consolidate the soil, the soil underground leakage of the rock-soil contact surface is effectively prevented and controlled, and water and soil resources are protected.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (2)
1. A karst region rock-soil contact surface soil leakage resistance control method comprises the following steps of planting plants in the karst region rock-soil contact surface soil, wherein the plant measures are distributed as follows:
taking bare rock in a karst region as a center, and dividing the periphery of the bare rock into 4 plant measure implementation and layout areas of an ascending position, a descending position, a left slope position and a right slope position;
the upward slope position is a north slope position, the downward slope position is a south slope position, the left slope position is a west slope position, and the right slope position is an east slope position;
planting herbaceous plants in the area close to the bare rock and surrounding the bare rock for a circle;
planting creeping lianas on the outer side of the herbaceous plant in the upward slope of the bare rock;
planting fast-growing plant fences at the downslope position, the left slope position and the right slope position of the bare rock, which are close to the outer sides of the herbaceous plants, and at the upslope position of the bare rock, which is close to the outer sides of the lianas;
wherein,
with bare rock in a karst region as a center, planting the herbaceous plants within 10cm of the upward slope of the bare rock, planting the lianas within 10-30cm of the upward slope of the bare rock, and planting the fast-growing hedges within 30-130cm of the upward slope of the bare rock;
with bare rock in a karst region as a center, planting the herbaceous plants within 20cm of the left slope position and the right slope position of the bare rock, and planting the fast-growing hedges within 20-140cm of the left slope position and the right slope position of the bare rock;
with bare rock in a karst region as a center, planting the herbaceous plants within 20cm of the downhill position of the bare rock, and planting the fast-growing hedges within 20-160cm of the downhill position of the bare rock;
the herbaceous plant is selected from one or more of native weed, vetiver, bermudagrass, grassiness and pennisetum;
the vine plant is selected from one or more of honeysuckle, litsea cubeba, climbing fig and pigeon pea;
the fast-growing hedgerow is selected from one or more of roxburgh rose, pyracantha fortuneana, calcium fruit and albizzia julibrissin;
wherein the fast-growing hedgerow in the upward slope of the bare rock is planted with 2 rows of shrubs, the planting distance is 15cm, and the row distance is 50 cm;
the fast-growing hedgerow in the left slope position and the right slope position of the bare rock is planted with 2 rows of shrubs, the planting distance is 20cm, and the row distance is 60 cm;
the fast-growing hedgerow in the downhill position of the bare rock is planted with 2 rows of shrubs, the planting distance is 25cm, and the row distance is 70 cm;
further comprising the step of adding a soil water-retaining agent to the disturbed soil area of the planted plants; the water-retaining agent is polyacrylamide, and the application amount of the water-retaining agent is 30-40kg/hm2。
2. The karst region rock-soil contact surface soil leakage resistance control method according to claim 1, further comprising the steps of obtaining moisture distribution conditions of the karst region rock-soil contact surface soil, and determining plant types and plant measure distribution layouts according to the moisture distribution conditions and plant water demand characteristics.
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CN101940115B (en) * | 2010-07-21 | 2012-02-01 | 四川省农业科学院土壤肥料研究所 | Forage hedgerow soil conservation planting technology |
CN102960146B (en) * | 2012-11-20 | 2015-01-21 | 周传艳 | Planting method for planting eco-economic vegetation in gentle slope land of karst stony desertification region |
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CN204104387U (en) * | 2014-10-22 | 2015-01-21 | 中国科学院地球化学研究所 | The device of the steady base soil moved in improve the original in a kind of Rocky Desertification Region |
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CN104956980A (en) * | 2015-06-08 | 2015-10-07 | 象州县科学技术情报研究所 | Cultivation method for Indian jujube trees grown on Karst stony desertification mountainous land |
CN106688760A (en) * | 2015-11-18 | 2017-05-24 | 詹小姗 | Cultivation method for Zizyphus mauritiana Lam. in rock-desertification mountainous area |
CN105794456A (en) * | 2016-03-22 | 2016-07-27 | 广西科技大学鹿山学院 | Method for repairing rocky desertification mountain land through interplanting of cornus wilsoniana, raspberry trees and ivy |
CN105875327A (en) * | 2016-04-21 | 2016-08-24 | 贵州师范大学 | Hedging planting method of hedgerow in karst region |
CN106192973A (en) * | 2016-07-15 | 2016-12-07 | 贵州天诚山地旅游开发有限公司 | A kind of stony desertification treatment method |
CN106576801B (en) * | 2016-12-06 | 2020-02-18 | 贵州师范大学 | Method for configuring hedgerow in medium-strength stony desertification environment in karst region |
CN107896548B (en) * | 2017-12-04 | 2020-11-24 | 中国科学院亚热带农业生态研究所 | Method and irrigation system suitable for ecological management of cliff section in karst rocky mountain area |
CN108713363A (en) * | 2018-05-14 | 2018-10-30 | 贵州师范大学 | A kind of Karst Rocky Desertification Region woods grass-shrub vegetation implantation methods |
CN109832074B (en) * | 2019-04-13 | 2021-06-29 | 贵州省分析测试研究院 | Method for recovering vegetation in karst region lead-zinc ore polluted rocky desertification area |
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