CN114303840A - Planting method for reducing incidence rate of hollowing of potato tubers - Google Patents
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Abstract
The invention provides a planting method for reducing the incidence rate of hollowing of potato tubers, and relates to the technical field of agricultural planting. The planting method for reducing the incidence rate of hollow tubers of potatoes comprises the following steps: s1, accelerating germination of seed potatoes; s2, determining a seeding date; s3, treating soil and applying base fertilizer; s4, sowing the seed potatoes with buds; s5, film mulching planting; s6, fertilizing in the flowering period; s7, seedling killing and harvesting. By adopting seed potato germination acceleration (gibberellin GA4+ GA7, 0.398%), spreading trichoderma in soil, applying a base fertilizer and a water-soluble calcium fertilizer, spraying water-soluble Ca (1500 times liquid) for 1 time when the potatoes bloom, and spraying calcium lactate (1500 times liquid) for 1 time every 7 days, the incidence rate of hollowing of potato tubers is reduced, and the nutritional quality and market competitiveness of the commercial potatoes are improved.
Description
Technical Field
The invention relates to the technical field of agricultural planting, in particular to a planting method for reducing the incidence rate of hollow tubers of potatoes.
Background
Potatoes belong to solanaceae, annual herbaceous plants are available, tubers are edible, are the fourth most important grain crops in the world, are inferior to wheat, rice and corn, potatoes are also named as potatoes, are one of high-yield crops with development prospects, are also one of ten most popular nutritional healthy foods, are inferior to rice, corn and wheat, are highly valued all over the world due to high and stable yield, wide adaptability, full nutritional ingredients and long industrial chain, and potato seeds and various processed products become important components in the global economic trade.
The hollow potato tuber is one of the important quality defects of potatoes, at present, the hollow potato tuber is frequent due to climate warming and the like, the nutritional ingredients (Vc content and Ca content) of the potatoes are reduced due to the hollow, meanwhile, visible mould is arranged at the hollow part, the potatoes cannot be eaten and can possibly influence the body health, and the current hollow control method mainly comprises the following steps: selecting a variety with low hollowness incidence rate, reasonably close planting, applying fertilizer according to a formula, applying potassium fertilizer additionally, keeping proper soil humidity in a tuber expansion period, optimizing field management and other methods, wherein the methods are unstable and hollowness still occurs in drought years or after potassium fertilizer application measures.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a planting method for reducing the incidence rate of potato tuber hollowing, and solves the problem that the incidence rate of potato tuber hollowing cannot be reduced by the conventional planting method.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a planting method for reducing the incidence rate of hollowing of potato tubers comprises the following steps:
s1, accelerating germination of seed potatoes
A) Adding 10ml (gibberellin GA4+ GA7, 0.398%) of water into 2000ml of healthy and detoxified first-grade seed potatoes and the seed potatoes of the above grades in a sprinkling can, shaking uniformly to obtain a solution, then uniformly sprinkling the solution on the surfaces of the seed potatoes by using the sprinkling can, cutting the seed potatoes by using a cutter 1-2 days before sowing after the seed potatoes are dried in the air, soaking the seed potatoes for 3-5 min by using a potassium permanganate solution before cutting the cutter, ensuring that 1-2 buds exist on each potato block during cutting, ensuring that the mass of each potato block is 15-25 g, adding 15kg of water into 30g (20% of thiadiazole copper) after cutting, drying in the air, then spraying 15kg of water mixed with 2.8% of fludioxonil and mefenoxam, and mixing the water with 15kg of talcum powder for the variety of which the tuber water content is higher than 85% after drying in the air;
B) 80-100 g of healthy detoxified first-grade seed potatoes and above-grade seed potatoes are selected for spring crop, 30g (20 percent of thiadiazole copper) of healthy detoxified first-grade seed potatoes is added with 15kg of water 1-2 days before sowing, the mixture is uniformly sprayed on the surfaces of the seed potatoes, and the whole potatoes are ready to be sowed after the seed potatoes are dried in the air;
s2, determining the sowing time
The sowing period of the potatoes planted in winter is from the middle ten days to the bottom of 11 months, the sowing period of the potatoes planted in spring is from the beginning of 12 months to the beginning of 1 month, and the sowing period of the potatoes planted in spring is from the bottom of 2 months to the beginning of 4 months;
s3, soil treatment and base fertilizer application
In a winter planting area, weeds in the field are pulled out 7-10 days before sowing, the field is dried, a rotary cultivator is used for rotary tillage treatment on the soil 3 days before sowing, water seepage treatment is carried out on the soil 7-10 days before sowing in spring, the rotary cultivator is used for rotary tillage, fine harrowing and ridging are carried out on the field after the field is dried, the height of each ridge is 30-40 cm, the field is prepared 1 day before spring planting, organic fertilizer is sprayed on the field according to the standard of 200 kg/mu, compound fertilizer with the ratio of N, P, K being 15:15 or 17:17:17 is sprayed on the field according to the standard of 100-120 kg/mu, calcium superphosphate is sprayed on the field according to the standard of 100-150 kg/mu, and calcium lactate is sprayed on the field according to the standard of 4 kg/mu;
s4, sowing the seeds of the potatoes with buds
Single-ridge single-row or large-ridge double-row planting is adopted during planting, 1kg of trichoderma is mixed with soil and is broadcast-applied according to the proportion of 1:4 in each mu of land during sowing, furrow application is adopted for potato seed sowing, also furrow application is carried out on trichoderma, hole sowing is carried out on the potato seeds, and also hole sowing is carried out on the trichoderma;
s5. film mulching planting
Covering and cultivating the winter crop area by adopting straws at the elevation of 500-800 meters, sowing the whole potatoes in spring, planting the potatoes at the elevation of more than 2000 meters by adopting a side film mulching mode, uncovering the film 50 days after seedling emergence in the middle and later stages of growth, mechanically ridging, returning the soil on the side film ridges to the potato seed sowing position and ridging;
s6, fertilizing in flowering period
Spraying water-soluble calcium solution (1500 times of solution) once when the potato blooms, and spraying calcium lactate once every seven days;
s7, seedling killing and harvesting
The harvesting period is determined according to market conditions when winter crops grow in the middle and last ten days of 3 months, seedlings are killed in advance 3-5 days before harvesting, spring crops are harvested from the bottom of 4 months to the beginning of 5 months when overground parts are yellow and dry, and spring crops are harvested in the middle and last ten days of 10 months.
Preferably, in the step S5, in the film mulching planting, the areas for winter and spring crop should pay close attention to rainfall, drainage should be performed in time when heavy rainstorm occurs, and irrigation should be performed in time when no rainfall occurs 15 days after sowing, so as to ensure seedling emergence.
Preferably, in the step S5, in the film mulching planting, the film mulching is carried out on the side films in spring in the middle and later growth stages, the films are timely uncovered after 50 days of the seedling stage, and the soil on the ridges of the side films is returned to the potato seed sowing position and ridged.
Preferably, the first-stage healthy detoxified potato is any one of the Yunshiya 306, the Yunshiya 109 or the Yunshiya 506.
Preferably, the planting density of the ipomoea batatas 306 is 5000 plants/mu, the planting density of the ipomoea batatas 109 is 4800 plants/mu, and the planting density of the ipomoea batatas 506 is 4500 plants/mu.
(III) advantageous effects
The invention provides a planting method for reducing the incidence rate of hollow tubers of potatoes. The method has the following beneficial effects:
the method adopts seed potatoes for germination acceleration (gibberellin GA4+ GA7, 0.398%), trichoderma is applied to soil in a spreading mode, water-soluble calcium fertilizers are applied to base fertilizers, water-soluble Ca (1500 times liquid) is sprayed for 1 time when the potatoes bloom, and water-soluble Ca (8%, 2% of magnesium sulfate, 0.05% of boron, Vc30mg/100g, L-galactonic acid-1, 4-lactone 30mg/100g and 1500 times liquid are sprayed for 1 time every 7 days, so that the incidence rate of hollow tubers of the potatoes is reduced, the nutritional quality and market competitiveness of the commercial potatoes are improved, the method is simple in operation compared with the conventional method, the prevention and control effect is stable, the incidence rate of hollow tubers of the potatoes is effectively reduced, the environmental stress resistance of the varieties is improved, the method is good in taste and processing quality, and is worthy of being well compensated and improved for the varieties with hollow defects, and is widely popularized.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a planting method for reducing the incidence rate of hollowing of potato tubers, which comprises the following steps:
s1, accelerating germination of seed potatoes
A) Adding 10ml (gibberellin GA4+ GA7, 0.398%) of water 2000ml of the first-grade seed potatoes which are healthy and detoxified into a spraying pot, shaking uniformly to obtain a solution, then uniformly spraying the solution on the surfaces of the seed potatoes by using the spraying pot, cutting the seed potatoes by using a cutter 2 days before sowing after the seed potatoes are dried in the air, soaking the seed potatoes for 5min by using a potassium permanganate solution before the seed potatoes are cut into blocks, ensuring that 2 buds are arranged on each potato block during cutting, ensuring that the mass of each potato block is 25g, adding 30g (20% of thiadiazole copper) of water 15kg after the seed potatoes are cut into the blocks, drying in the air after spraying, spraying 15kg of fludioxonil and 2.8% of mefenoxam by adding water, and mixing talcum powder with the water content of the tubers higher than 85% after the seed potatoes are dried in the air;
B) selecting 100g of healthy detoxified first-grade seed potatoes and the seed potatoes of above grades in spring, adding 30g (20% of thiadiazole copper) of water 15kg by using a sprinkling can 2 days before sowing, uniformly sprinkling the mixture on the surfaces of the seed potatoes, and airing the seed potatoes to obtain the whole potatoes to be sowed;
s2, determining the sowing time
The sowing period of the potatoes planted in winter is from the middle ten days to the bottom of 11 months, the sowing period of the potatoes planted in spring is from the beginning of 12 months to the beginning of 1 month, and the sowing period of the potatoes planted in spring is from the bottom of 2 months to the beginning of 4 months;
s3, soil treatment and base fertilizer application
In a winter planting area, weeds in the field are pulled out 10 days before sowing, the field is dried, a rotary cultivator is used for rotary tillage treatment on the soil 3 days before sowing, water seepage treatment is carried out on the soil 10 days before sowing in spring, after the field is dried, the rotary cultivator is used for rotary tillage, fine harrowing and ridging are carried out on the field, the height of each ridge is 40cm, the field is prepared 1 day in advance in spring planting, organic fertilizer is sprayed on the field according to the standard of 200 kg/mu, N is sprayed on the field according to the standard of 120 kg/mu, P is a compound fertilizer with the ratio of 15:15:15 or 17:17:17, calcium superphosphate is sprayed on the field according to the standard of 150 kg/mu, and calcium lactate is sprayed on the field according to the standard of 4 kg/mu;
s4, sowing the seeds of the potatoes with buds
Single-ridge single-row or large-ridge double-row planting is adopted during planting, 1kg of trichoderma is mixed with soil and is broadcast-applied according to the proportion of 1:4 in each mu of land during sowing, furrow application is adopted for potato seed sowing, also furrow application is carried out on trichoderma, hole sowing is carried out on the potato seeds, and also hole sowing is carried out on the trichoderma;
s5. film mulching planting
Covering and cultivating the winter crop area by adopting straws at the elevation of 500-800 meters, sowing the whole potatoes in spring, planting the potatoes at the elevation of more than 2000 meters by adopting a side film mulching mode, uncovering the film 50 days after seedling emergence in the middle and later stages of growth, mechanically ridging, returning the soil on the side film ridges to the potato seed sowing position and ridging;
s6, fertilizing in flowering period
Spraying water-soluble calcium solution (1500 times of solution) once when the potato blooms, and spraying calcium lactate once every seven days;
s7, seedling killing and harvesting
The harvesting period is determined according to market conditions when winter crops grow in the middle and last ten days of 3 months, seedlings are killed in advance 3-5 days before harvesting, spring crops are harvested from the bottom of 4 months to the beginning of 5 months when overground parts are yellow and dry, and spring crops are harvested in the middle and last ten days of 10 months.
By adopting seed potato germination acceleration (gibberellin GA4+ GA7, 0.398%), spreading trichoderma in soil, fertilizing base fertilizer and increasing calcium fertilizer, spraying water-soluble Ca (1500 times liquid) for 1 time when the potatoes bloom, and spraying water-soluble Ca (1500 times liquid) for 1 time every 7 days, the incidence rate of hollowing potato tubers is reduced, the nutritional quality and market competitiveness of the commercial potatoes are improved, the method is simpler in operation than the conventional method, the control effect is stable, and the incidence rate of hollowing potato tubers is effectively reduced.
In the step S5, in the film mulching planting, the areas for winter and spring crop should pay close attention to rainfall, drainage is carried out in time when heavy rainstorm exists, irrigation is carried out in time when no rainfall exists 15 days after sowing, and seedling emergence is guaranteed.
And S5, in the step of film mulching planting, in the middle and later growth period of the spring side film mulching planting, uncovering the film in time after 50 days of the seedling period, returning the soil on the side film ridges to the potato seed sowing position and ridging.
The first-stage potato for health detoxification is selected from one of Yunshu 306, Yunshu 109 or Yunshu 506.
The planting density of the ipomoea batatas 306 is 5000 plants/mu, the planting density of the ipomoea batatas 109 is 4800 plants/mu, and the planting density of the ipomoea batatas 506 is 4500 plants/mu.
Example two:
the embodiment of the invention provides a planting method for reducing the incidence rate of hollowing of potato tubers, which comprises the following steps:
s1, accelerating germination of seed potatoes
A) Adding 2000ml of water into 10ml (gibberellin GA4+ GA7, 0.398%) and 2000ml of water into a spraying pot to shake uniformly to obtain a solution, then uniformly spraying the solution on the surface of the seed potatoes by using the spraying pot, cutting the seed potatoes by using a cutter 1 day before sowing after the seed potatoes are dried in the air, soaking the seed potatoes for 3min by using a potassium permanganate solution before cutting by using the cutter, ensuring that 1-2 buds are arranged on each potato block during cutting, ensuring that the mass of each potato block is 15g, adding 15kg of 30g (20% thiadiazole copper) of water after cutting, spraying, drying in the air, adding 15kg of water containing 2.8% of fludioxonil and mefenoxam, and spraying and drying in the air, and mixing seeds by using talcum powder for the variety of which the water content of the tuber is higher than 85%;
B) 80g of healthy detoxified first-grade seed potatoes and the seed potatoes of above grades are selected for spring crop, 30g (20 percent of thiadiazole copper) of the seed potatoes is added with 15kg of water by using a sprinkling can 1 day before sowing, the mixture is uniformly sprinkled on the surfaces of the seed potatoes, and the whole potatoes are ready to be sowed after the seed potatoes are dried in the air;
s2, determining the sowing time
The sowing period of the potatoes planted in winter is from the middle ten days to the bottom of 11 months, the sowing period of the potatoes planted in spring is from the beginning of 12 months to the beginning of 1 month, and the sowing period of the potatoes planted in spring is from the bottom of 2 months to the beginning of 4 months;
s3, soil treatment and base fertilizer application
In a winter planting area, weeds in the field are pulled out 7 days before sowing, the field is dried, a rotary cultivator is used for carrying out rotary tillage treatment on the soil 3 days before sowing, water seepage treatment is carried out on the soil 7 days before sowing in spring, after the field is dried, the rotary cultivator is used for carrying out rotary tillage, fine harrowing and ridging on the field, the height of each ridge is 30cm, the field is prepared 1 day in advance in spring planting, organic fertilizer is sprayed on the field according to the standard of 200 kg/mu, N is sprayed on the field according to the standard of 100 kg/mu, P is a compound fertilizer with the ratio of 15:15:15 or 17:17:17, calcium superphosphate is sprayed on the field according to the standard of 100 kg/mu, and calcium lactate is sprayed on the field according to the standard of 4 kg/mu;
s4, sowing the seeds of the potatoes with buds
Single-ridge single-row or large-ridge double-row planting is adopted during planting, 1kg of trichoderma is mixed with soil and is broadcast-applied according to the proportion of 1:4 in each mu of land during sowing, furrow application is adopted for potato seed sowing, also furrow application is carried out on trichoderma, hole sowing is carried out on the potato seeds, and also hole sowing is carried out on the trichoderma;
s5. film mulching planting
Covering and cultivating the winter crop area by adopting straws at the elevation of 500-800 meters, sowing the whole potatoes in spring, planting the potatoes at the elevation of more than 2000 meters by adopting a side film mulching mode, uncovering the film 50 days after seedling emergence in the middle and later stages of growth, mechanically ridging, returning the soil on the side film ridges to the potato seed sowing position and ridging;
s6, fertilizing in flowering period
Spraying water-soluble calcium solution (1500 times of solution) once when the potato blooms, and spraying calcium lactate once every seven days;
s7, seedling killing and harvesting
The harvesting period is determined according to market conditions when winter crops grow in the middle and last ten days of 3 months, seedlings are killed in advance 3-5 days before harvesting, spring crops are harvested from the bottom of 4 months to the beginning of 5 months when overground parts are yellow and dry, and spring crops are harvested in the middle and last ten days of 10 months.
By adopting seed potato germination acceleration (gibberellin GA4+ GA7, 0.398%), spreading trichoderma in soil, fertilizing base fertilizer and increasing calcium fertilizer, spraying water-soluble Ca (1500 times liquid) for 1 time when the potatoes bloom, and spraying water-soluble Ca (1500 times liquid) for 1 time every 7 days, the incidence rate of hollowing potato tubers is reduced, the nutritional quality and market competitiveness of the commercial potatoes are improved, the method is simpler in operation than the conventional method, the control effect is stable, and the incidence rate of hollowing potato tubers is effectively reduced.
In the step S5, in the film mulching planting, the areas for winter and spring crop should pay close attention to rainfall, drainage is carried out in time when heavy rainstorm exists, irrigation is carried out in time when no rainfall exists 15 days after sowing, and seedling emergence is guaranteed.
And S5, in the step of film mulching planting, in the middle and later growth period of the spring side film mulching planting, uncovering the film in time after 50 days of the seedling period, returning the soil on the side film ridges to the potato seed sowing position and ridging.
The first-stage potato for health detoxification is selected from one of Yunshu 306, Yunshu 109 or Yunshu 506.
The planting density of the ipomoea batatas 306 is 5000 plants/mu, the planting density of the ipomoea batatas 109 is 4800 plants/mu, and the planting density of the ipomoea batatas 506 is 4500 plants/mu.
| Species of seed potato | Trichoderma treatment | Hollow rate |
| Cloud potato 506 | Is that | 3.3％ |
| Cloud potato 506 | Whether or not | 40％ |
The table above is an experimental data table of the influence of the spreading of trichoderma on the hollow rate of the potato tuber;
| species of seed potato | Seed potato germination accelerating treatment | Fertilization treatment in flowering period | Hollow rate |
| Cloud potato 306 | Is that | Is that | 3.8％ |
| Cloud potato 306 | Is that | Whether or not | 55.6％ |
The table is an experimental data table of the influence of fertilization treatment in the flowering period on the hollow rate of potato tuber stems;
| species of seed potato | Presence or absence of processing | Hollow rate |
| Cloud potato 306 | Whether or not | 85.7％ |
The table above is a table of experimental data on the effect of no treatment on the hollowness of potato tubers at the time of planting. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A planting method for reducing the incidence rate of hollowing of potato tubers is characterized by comprising the following steps: the method comprises the following steps:
s1, accelerating germination of seed potatoes
A) Adding 10ml (gibberellin GA4+ GA7, 0.398%) of water into 2000ml of healthy and detoxified first-grade seed potatoes and the seed potatoes of the above grades in a sprinkling can, shaking uniformly to obtain a solution, then uniformly sprinkling the solution on the surfaces of the seed potatoes by using the sprinkling can, cutting the seed potatoes by using a cutter 1-2 days before sowing after the seed potatoes are dried in the air, soaking the seed potatoes for 3-5 min by using a potassium permanganate solution before cutting the cutter, ensuring that 1-2 buds exist on each potato block during cutting, ensuring that the mass of each potato block is 15-25 g, adding 15kg of water into 30g (20% of thiadiazole copper) after cutting, drying in the air, then spraying 15kg of water mixed with 2.8% of fludioxonil and mefenoxam, and mixing the water with 15kg of talcum powder for the variety of which the tuber water content is higher than 85% after drying in the air;
B) 80-100 g of healthy detoxified first-grade seed potatoes and the seed potatoes of above grades are selected for spring crop, 30g (20 percent of thiadiazole copper) of the seed potatoes is added with 15kg of water by using a sprinkling can 1-2 days before sowing, the mixture is uniformly sprayed on the surfaces of the seed potatoes, and the whole potatoes are ready to be sowed after the seed potatoes are dried in the air;
s2, determining the sowing time
The sowing period of the potatoes planted in winter is from the middle ten days to the bottom of 11 months, the sowing period of the potatoes planted in spring is from the beginning of 12 months to the beginning of 1 month, and the sowing period of the potatoes planted in spring is from the bottom of 2 months to the beginning of 4 months;
s3, soil treatment and base fertilizer application
In a winter planting area, weeds in the field are pulled out 7-10 days before sowing, the field is dried, a rotary cultivator is used for rotary tillage treatment on the soil 3 days before sowing, water seepage treatment is carried out on the soil 7-10 days before sowing in spring, the rotary cultivator is used for rotary tillage, fine harrowing and ridging are carried out on the field after the field is dried, the height of each ridge is 30-40 cm, the field is prepared 1 day before spring planting, organic fertilizer is sprayed on the field according to the standard of 200 kg/mu, compound fertilizer with the ratio of N, P, K being 15:15 or 17:17:17 is sprayed on the field according to the standard of 100-120 kg/mu, calcium superphosphate is sprayed on the field according to the standard of 100-150 kg/mu, and calcium lactate is sprayed on the field according to the standard of 4 kg/mu;
s4, sowing the seeds of the potatoes with buds
Single-ridge single-row or large-ridge double-row planting is adopted during planting, 1kg of trichoderma is mixed with soil and is broadcast-applied according to the proportion of 1:4 in each mu of land during sowing, furrow application is adopted for potato seed sowing, also furrow application is carried out on trichoderma, hole sowing is carried out on the potato seeds, and also hole sowing is carried out on the trichoderma;
s5. film mulching planting
Covering and cultivating the winter crop area by adopting straws at the elevation of 500-800 meters, sowing the whole potatoes in spring, planting the potatoes at the elevation of more than 2000 meters by adopting a side film mulching mode, uncovering the film 50 days after seedling emergence in the middle and later stages of growth, mechanically ridging, returning the soil on the side film ridges to the potato seed sowing position and ridging;
s6, fertilizing in flowering period
Spraying water-soluble calcium solution (1500 times of solution) once when the potato blooms, and spraying calcium lactate once every seven days;
s7, seedling killing and harvesting
The harvesting period is determined according to market conditions when winter crops grow in the middle and last ten days of 3 months, seedlings are killed in advance 3-5 days before harvesting, spring crops are harvested from the bottom of 4 months to the beginning of 5 months when overground parts are yellow and dry, and spring crops are harvested in the middle and last ten days of 10 months.
2. The planting method for reducing incidence of hollowing of potato tubers as claimed in claim 1, wherein: in the step S5, in the film mulching planting, the areas for winter and spring crop should pay close attention to rainfall, drainage is carried out in time when heavy rainstorm exists, and irrigation is carried out in time when no rainfall exists 15 days after sowing, so that seedling emergence is ensured.
3. The planting method for reducing incidence of hollowing of potato tubers as claimed in claim 1, wherein: in the step S5, in the film mulching planting, the film mulching is carried out on the side films of the spring crops in the middle and later growth stages, the films are timely uncovered after 50 days of the seedling stage, and the soil on the ridges of the side films is returned to the potato seed sowing position and ridged.
4. The planting method for reducing incidence of hollowing of potato tubers as claimed in claim 1, wherein: the first-stage healthy detoxified potato is selected from any one of Yunshi 306, Yunshi 109 or Yunshi 506.
5. The planting method for reducing incidence of hollowing of potato tubers according to claim 4, wherein: the planting density of the ipomoea batatas 306 is 5000 plants/mu, the planting density of the ipomoea batatas 109 is 4800 plants/mu, and the planting density of the ipomoea batatas 506 is 4500 plants/mu.
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