CN107853336A - 一种功能型生物除草剂的制备方法 - Google Patents
一种功能型生物除草剂的制备方法 Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
- A01N43/14—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings
- A01N43/16—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings with oxygen as the ring hetero atom
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/08—Alkali metal chlorides; Alkaline earth metal chlorides
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N63/00—Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
- A01N63/10—Animals; Substances produced thereby or obtained therefrom
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/40—Liliopsida [monocotyledons]
- A01N65/44—Poaceae or Gramineae [Grass family], e.g. bamboo, lemon grass or citronella grass
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Environmental Sciences (AREA)
- Plant Pathology (AREA)
- Dentistry (AREA)
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- Microbiology (AREA)
- Biotechnology (AREA)
- Natural Medicines & Medicinal Plants (AREA)
- Mycology (AREA)
- Virology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
本发明公开了一种功能型生物除草剂的制备方法,属于农药制备技术领域。本发明技术方案研制的除草剂是由壳聚糖、酪素、磷脂、混合剂、干燥下层沉淀物和水混合后低温喷雾干燥制得,而其中干燥下层沉淀物制备过程中,是采用杂草叶喂食蝗虫幼虫,喂食期间,定时向蝗虫腹部注射杂草根汁液,再将成虫后的蝗虫与缓冲液混合榨汁,再经无水乙醇沉淀后离心分离,并干燥,而指的干燥下层沉淀物;另外,添加的混合剂是由葡萄糖、果糖、天门冬氨酸和氯化钾等物质组成。本发明所制得的除草剂具有优异的除草效果。
Description
技术领域
本发明公开了一种功能型生物除草剂的制备方法,属于农药制备技术领域。
背景技术
除草剂是指可使杂草彻底地或选择地发生枯死的药剂,又称除莠剂,用以消灭或抑制植物生长的一类物质。
其中的氯酸钠、硼砂、砒酸盐、三氯醋酸对于任何种类的植物都有枯死的作用,其作用受除草剂、植物和环境条件三因素的影响。按作用分为灭生性和选择性除草剂,选择性除草剂特别是硝基苯酚、氯苯酚、氨基甲酸的衍生物多数都有效。世界除草剂发展渐趋平稳,主要发展高效、低毒、广谱、低用量的品种,对环境污染小的一次性处理剂逐渐成为主流。
除草剂根据其作用方式分类,可分为:(1)选择性除草剂:除草剂对不同种类的苗木,抗性程度也不同,此药剂可以杀死杂草,而对苗木无害。如盖草能、氟乐灵、扑草净、西玛津、果尔除草剂等。(2)灭生性除草剂:除草剂对所有植物都有毒性,只要接触绿色部分,不分苗木和杂草,都会受害或被杀死。主要在播种前、播种后出苗前、苗圃主副道上使用。如草甘膦等。
根据除草剂在植物体内的移动情况分类,可分为:(1)触杀型除草剂:药剂与杂草接触时,只杀死与药剂接触的部分,起到局部的杀伤作用,植物体内不能传导。只能杀死杂草的地上部分,对杂草的地下部分或有地下茎的多年生深根性杂草,则效果较差。如除草醚、百草枯等。(2)内吸传导型除草剂:药剂被根系或叶片、芽鞘或茎部吸收后,传导到植物体内,使植物死亡。如草甘膦、扑草净等。(3)内吸传导、触杀综合型除草剂:具有内吸传导、触杀型双重功能,如杀草胺等。
按照其使用方法分类,可分为:(1)茎叶处理剂:将除草剂溶液兑水,以细小的雾滴均匀的喷洒在植株上,这种喷洒法使用的除草剂叫茎叶处理剂,如盖草能、草甘膦等。(2)土壤处理剂:将除草剂均匀地喷洒到土壤上形在一定厚度的药层,当杂草种子的幼芽、幼苗及其根系被接触吸收而起到杀草作用,这种作用的除草剂,叫土壤处理剂,如西玛津、扑草净、氟乐灵等,可采用喷雾法、浇洒法、毒土法施用。(3)茎叶、土壤处理剂:可作茎叶处理,也可作土壤处理,如阿特拉津等。
常用的品种为有机化合物,可广泛用于防治农田、果园、花卉苗圃、草原及非耕地、铁路线、河道、水库、仓库等地杂草、杂灌、杂树等有害植物。因为目前传统的除草剂还存在除草效果不佳、改善土壤环境效果差的问题,所以还需对其进行进一步研究。
发明内容
本发明主要解决的技术问题是:针对传统除草剂除草效果不佳的问题,提供了一种功能型生物除草剂的制备方法。
为了解决上述技术问题,本发明所采用的技术方案是:
(1)将杂草根与生理盐水按质量比为1:5~1:10混合后榨汁,再经过滤,得杂草根汁液;
(2)用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫,在蝗虫生长期间,每隔12~24h向蝗虫腹部注射3~5uL杂草根汁液;
(3)将5龄期蝗虫与磷酸盐缓冲液按质量比为1:10~1:12混合后榨汁、过滤,得蝗虫汁液;
(4)向蝗虫汁液中滴加蝗虫汁液体积4~8%的无水乙醇后,离心分离,收集下层沉淀物,再经真空冷冻干燥,得干燥下层沉淀物;
(5)按重量份数计,依次取4~8份壳聚糖,3~5份酪素,4~8份磷脂,4~6份混合剂,20~30份干燥下层沉淀物,80~100份水,先将壳聚糖、酪素和水搅拌混合后,静置溶胀,再加入磷脂、混合剂和干燥下层沉淀物,高速搅拌混合后,低温喷雾干燥,即得功能型生物除草剂。
所述杂草为稗草、白茅、虾须草或狗牙草中的任意一种。
步骤(1)所述生理盐水是由以下重量分数的原料配置而成:5~7份氯化钠,0.1~0.2份氯化钙,0.2~0.3份氯化钾,0.1~0.2份六水合氯化镁,0.10~0.15份碳酸氢钠,0.15~0.18份磷酸二氢钾,5~7份葡萄糖,1000~1200份水。
步骤(3)所述磷酸盐缓冲液为pH为6.2~6.4的磷酸盐缓冲液。
步骤(5)所述壳聚糖为脱乙酰度为90~95%的壳聚糖。
步骤(5)所述磷脂为大豆卵磷脂或蛋黄卵磷脂中的任意一种。
步骤(5)所述混合剂是由以下重量份数的原料组成:8~10份葡萄糖、4~8份天门冬氨酸、2~4份果糖、3~5份氯化钾和80~100份水。
本发明的有益效果是:
(1)本发明技术方案通过采用蝗虫体内具有对杂草叶片及根部具有优异降解能力的酶及微生物,在使用过程中喷洒后,酶可将杂草叶片及根部表面植物细胞降解,在表面形成伤口,从而有利于产品中对杂草有侵害作用的细菌及病毒等微生物进入杂草体内,从而导致杂草衰败死亡,待杂草死亡后,酶和微生物可进一步对杂草进行降解,使其降解为小分子有机质而被土壤吸收,从而提高土壤营养值,从而起到对杂草的无害化处理;
(2)本发明技术方案通过利用杂草根汁液在蝗虫生长过程中进行注射,诱导蝗虫体内产生对杂草根中成分具有优异降解能力的酶及微生物,且杂草根因生长过程中,长期与土壤接触,因此,其中含有土壤中细菌及病毒,利用其注射进入蝗虫体内后,可使蝗虫体内产生对土壤中细菌及病毒有抑制作用的有益成分,在使用过程中,此类有益成分可随杂草降解后生成的营养物质一起渗透进入土壤,实现对土壤中有害微生物的抑制,从而改善土壤环境;
(3)本发明技术方案通过在产品中添加具有对微生物孢子萌发具有诱导能力的混合剂,有利于产品在使用过程中,诱导产品中休眠的微生物孢子快速萌发,从而提高产品的除草效果,且产品中有效成分为生物型,在使用过程中,不会使杂草产生抗药性,且添加的物质后期可作为土壤营养成分,调节土壤环境,不会对环境造成污染。
具体实施方式
将杂草用水清洗,去除表面污物,再将清洗后的杂草叶和杂草根切断分离,将杂草根与生理盐水按质量比为1:5~1:10混合倒入榨汁机中,榨汁后过滤,得滤液,即为杂草根汁液;于温度为25~30℃,相对湿度为45~50%条件下,用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫,在蝗虫生长期间,每隔12~24h向每只蝗虫腹部注射3~5uL杂草根汁液;将所得5龄期蝗虫与pH为6.2~6.4的磷酸盐缓冲液按质量比为1:10~1:12混合倒入榨汁机中,进行榨汁后,过滤,得蝗虫汁液;并将所得蝗虫汁液倒入烧杯中,于玻璃棒搅拌状态下,向烧杯中滴加蝗虫汁液体积4~8%的无水乙醇,待无水乙醇滴加结束,继续用玻璃棒搅拌混合20~30min,得混合液,并将所得混合液转入离心机,以6000~8000r/min转速离心分离10~15min,收集下层沉淀物,并将所得下层沉淀物转入真空冷冻干燥箱,干燥4~6h,出料,得干燥下层沉淀物;按重量份数计,依次取4~8份壳聚糖,3~5份酪素,4~8份磷脂,4~6份混合剂,20~30份干燥下层沉淀物,80~100份水,先将壳聚糖、酪素和水倒入混料机中,于转速为200~300r/min条件下,搅拌混合10~15min后,停止搅拌,静置溶胀2~4h,再向混料机中依次加入磷脂、混合剂和干燥下层沉淀物,于转速为1200~1500r/min条件下,高速搅拌混合2~4min后,出料,得混合料,并将所得混合料输送至喷雾干燥器,于进风温度为45~50℃,出风温度为40~42℃条件下,低温喷雾干燥,即得功能型生物除草剂。所述杂草为稗草、白茅、虾须草或狗牙草中的任意一种。所述生理盐水是由以下重量分数的原料配置而成:5~7份氯化钠,0.1~0.2份氯化钙,0.2~0.3份氯化钾,0.1~0.2份六水合氯化镁,0.10~0.15份碳酸氢钠,0.15~0.18份磷酸二氢钾,5~7份葡萄糖,1000~1200份水。所述壳聚糖为脱乙酰度为90~95%的壳聚糖。所述磷脂为大豆卵磷脂或蛋黄卵磷脂中的任意一种。所述混合剂是由以下重量份数的原料组成:8~10份葡萄糖、4~8份天门冬氨酸、2~4份果糖、3~5份氯化钾和80~100份水。
实例1
将杂草用水清洗,去除表面污物,再将清洗后的杂草叶和杂草根切断分离,将杂草根与生理盐水按质量比为1:10混合倒入榨汁机中,榨汁后过滤,得滤液,即为杂草根汁液;于温度为30℃,相对湿度为50%条件下,用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫,在蝗虫生长期间,每隔24h向每只蝗虫腹部注射5uL杂草根汁液;将所得5龄期蝗虫与pH为6.4的磷酸盐缓冲液按质量比为1:12混合倒入榨汁机中,进行榨汁后,过滤,得蝗虫汁液;并将所得蝗虫汁液倒入烧杯中,于玻璃棒搅拌状态下,向烧杯中滴加蝗虫汁液体积8%的无水乙醇,待无水乙醇滴加结束,继续用玻璃棒搅拌混合30min,得混合液,并将所得混合液转入离心机,以8000r/min转速离心分离15min,收集下层沉淀物,并将所得下层沉淀物转入真空冷冻干燥箱,干燥6h,出料,得干燥下层沉淀物;按重量份数计,依次取8份壳聚糖,5份酪素,8份磷脂,6份混合剂,30份干燥下层沉淀物,100份水,先将壳聚糖、酪素和水倒入混料机中,于转速为300r/min条件下,搅拌混合15min后,停止搅拌,静置溶胀4h,再向混料机中依次加入磷脂、混合剂和干燥下层沉淀物,于转速为1500r/min条件下,高速搅拌混合4min后,出料,得混合料,并将所得混合料输送至喷雾干燥器,于进风温度为50℃,出风温度为42℃条件下,低温喷雾干燥,即得功能型生物除草剂。所述杂草为稗草。所述生理盐水是由以下重量分数的原料配置而成:7份氯化钠,0.2份氯化钙,0.3份氯化钾,0.2份六水合氯化镁,0.15份碳酸氢钠,0.18份磷酸二氢钾,7份葡萄糖,1200份水。所述壳聚糖为脱乙酰度为95%的壳聚糖。所述磷脂为大豆卵磷脂。所述混合剂是由以下重量份数的原料组成:10份葡萄糖、8份天门冬氨酸、4份果糖、5份氯化钾和100份水。
实例2
于温度为30℃,相对湿度为50%条件下,用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫;将所得5龄期蝗虫与pH为6.4的磷酸盐缓冲液按质量比为1:12混合倒入榨汁机中,进行榨汁后,过滤,得蝗虫汁液;并将所得蝗虫汁液倒入烧杯中,于玻璃棒搅拌状态下,向烧杯中滴加蝗虫汁液体积8%的无水乙醇,待无水乙醇滴加结束,继续用玻璃棒搅拌混合30min,得混合液,并将所得混合液转入离心机,以8000r/min转速离心分离15min,收集下层沉淀物,并将所得下层沉淀物转入真空冷冻干燥箱,干燥6h,出料,得干燥下层沉淀物;按重量份数计,依次取8份壳聚糖,5份酪素,8份磷脂,6份混合剂,30份干燥下层沉淀物,100份水,先将壳聚糖、酪素和水倒入混料机中,于转速为300r/min条件下,搅拌混合15min后,停止搅拌,静置溶胀4h,再向混料机中依次加入磷脂、混合剂和干燥下层沉淀物,于转速为1500r/min条件下,高速搅拌混合4min后,出料,得混合料,并将所得混合料输送至喷雾干燥器,于进风温度为50℃,出风温度为42℃条件下,低温喷雾干燥,即得功能型生物除草剂。所述杂草为稗草。所述生理盐水是由以下重量分数的原料配置而成:7份氯化钠,0.2份氯化钙,0.3份氯化钾,0.2份六水合氯化镁,0.15份碳酸氢钠,0.18份磷酸二氢钾,7份葡萄糖,1200份水。所述壳聚糖为脱乙酰度为95%的壳聚糖。所述磷脂为大豆卵磷脂。所述混合剂是由以下重量份数的原料组成:10份葡萄糖、8份天门冬氨酸、4份果糖、5份氯化钾和100份水。
实例3
将杂草用水清洗,去除表面污物,再将清洗后的杂草叶和杂草根切断分离,将杂草根与生理盐水按质量比为1:10混合倒入榨汁机中,榨汁后过滤,得滤液,即为杂草根汁液;于温度为30℃,相对湿度为50%条件下,用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫,在蝗虫生长期间,每隔24h向每只蝗虫腹部注射5uL杂草根汁液;将所得5龄期蝗虫与pH为6.4的磷酸盐缓冲液按质量比为1:12混合倒入榨汁机中,进行榨汁后,过滤,得蝗虫汁液;并将所得蝗虫汁液倒入烧杯中,于玻璃棒搅拌状态下,向烧杯中滴加蝗虫汁液体积8%的无水乙醇,待无水乙醇滴加结束,继续用玻璃棒搅拌混合30min,得混合液,并将所得混合液转入离心机,以8000r/min转速离心分离15min,收集下层沉淀物,并将所得下层沉淀物转入真空冷冻干燥箱,干燥6h,出料,得干燥下层沉淀物;按重量份数计,依次取8份壳聚糖,5份酪素,8份磷脂,30份干燥下层沉淀物,100份水,先将壳聚糖、酪素和水倒入混料机中,于转速为300r/min条件下,搅拌混合15min后,停止搅拌,静置溶胀4h,再向混料机中依次加入磷脂和干燥下层沉淀物,于转速为1500r/min条件下,高速搅拌混合4min后,出料,得混合料,并将所得混合料输送至喷雾干燥器,于进风温度为50℃,出风温度为42℃条件下,低温喷雾干燥,即得功能型生物除草剂。所述杂草为稗草。所述生理盐水是由以下重量分数的原料配置而成:7份氯化钠,0.2份氯化钙,0.3份氯化钾,0.2份六水合氯化镁,0.15份碳酸氢钠,0.18份磷酸二氢钾,7份葡萄糖,1200份水。所述壳聚糖为脱乙酰度为95%的壳聚糖。所述磷脂为大豆卵磷脂。
实例4
将杂草用水清洗,去除表面污物,再将清洗后的杂草叶和杂草根切断分离,将杂草根与生理盐水按质量比为1:10混合倒入榨汁机中,榨汁后过滤,得滤液,即为杂草根汁液;于温度为30℃,相对湿度为50%条件下,用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫,在蝗虫生长期间,每隔24h向每只蝗虫腹部注射5uL杂草根汁液;将所得5龄期蝗虫与pH为6.4的磷酸盐缓冲液按质量比为1:12混合倒入榨汁机中,进行榨汁后,过滤,得蝗虫汁液;并将所得蝗虫汁液倒入烧杯中,于玻璃棒搅拌状态下,向烧杯中滴加蝗虫汁液体积8%的无水乙醇,待无水乙醇滴加结束,继续用玻璃棒搅拌混合30min,得混合液,并将所得混合液转入离心机,以8000r/min转速离心分离15min,收集下层沉淀物,并将所得下层沉淀物转入真空冷冻干燥箱,干燥6h,出料,得干燥下层沉淀物;按重量份数计,依次取8份壳聚糖,5份酪素,6份混合剂,30份干燥下层沉淀物,100份水,先将壳聚糖、酪素和水倒入混料机中,于转速为300r/min条件下,搅拌混合15min后,停止搅拌,静置溶胀4h,再向混料机中依次加入混合剂和干燥下层沉淀物,于转速为1500r/min条件下,高速搅拌混合4min后,出料,得混合料,并将所得混合料输送至喷雾干燥器,于进风温度为50℃,出风温度为42℃条件下,低温喷雾干燥,即得功能型生物除草剂。所述杂草为稗草。所述生理盐水是由以下重量分数的原料配置而成:7份氯化钠,0.2份氯化钙,0.3份氯化钾,0.2份六水合氯化镁,0.15份碳酸氢钠,0.18份磷酸二氢钾,7份葡萄糖,1200份水。所述壳聚糖为脱乙酰度为95%的壳聚糖。所述混合剂是由以下重量份数的原料组成:10份葡萄糖、8份天门冬氨酸、4份果糖、5份氯化钾和100份水。
实例5
将杂草用水清洗,去除表面污物,再将清洗后的杂草叶和杂草根切断分离,将杂草根与生理盐水按质量比为1:10混合倒入榨汁机中,榨汁后过滤,得滤液,即为杂草根汁液;于温度为30℃,相对湿度为50%条件下,用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫,在蝗虫生长期间,每隔24h向每只蝗虫腹部注射5uL杂草根汁液;将所得5龄期蝗虫与pH为6.4的磷酸盐缓冲液按质量比为1:12混合倒入榨汁机中,进行榨汁后,过滤,得蝗虫汁液;并将所得蝗虫汁液倒入烧杯中,于玻璃棒搅拌状态下,向烧杯中滴加蝗虫汁液体积8%的无水乙醇,待无水乙醇滴加结束,继续用玻璃棒搅拌混合30min,得混合液,并将所得混合液转入离心机,以8000r/min转速离心分离15min,收集下层沉淀物,并将所得下层沉淀物转入真空冷冻干燥箱,干燥6h,出料,得干燥下层沉淀物;按重量份数计,依次取8份壳聚糖,5份酪素,8份磷脂,6份混合剂,30份干燥下层沉淀物,100份水,先将壳聚糖、酪素和水倒入混料机中,于转速为300r/min条件下,搅拌混合15min后,停止搅拌,静置溶胀4h,再向混料机中依次加入磷脂、混合剂和干燥下层沉淀物,于转速为1500r/min条件下,高速搅拌混合4min后,出料,得混合料,并将所得混合料输送至喷雾干燥器,于进风温度为50℃,出风温度为42℃条件下,低温喷雾干燥,即得功能型生物除草剂。所述杂草为稗草。所述生理盐水是由以下重量分数的原料配置而成:7份氯化钠,0.2份氯化钙,0.3份氯化钾,0.2份六水合氯化镁,0.15份碳酸氢钠,0.18份磷酸二氢钾,7份葡萄糖,1200份水。所述壳聚糖为脱乙酰度为60%的壳聚糖。所述磷脂为大豆卵磷脂。所述混合剂是由以下重量份数的原料组成:10份葡萄糖、8份天门冬氨酸、4份果糖、5份氯化钾和100份水。
对比例:河南某农业科技有限公司生产的除草剂。
将实例1至5所得除草剂和对比例产品进行性能检测,具体检测方法如下:
试验区位于河西走廊东端,属于大陆性干旱气候。海拔1670m,年平均气温7.5~7.9℃,北纬37°30′,东经103°5′,年平均降雨量190.5~200mm,年均日照时数2724.8h,≥10℃的有效积温2700~3000℃,无霜期约150天。试验田土壤为砂壤土,土壤肥力状况:有机质1.8g/kg,速效氮52.3mg/kg,速效磷21.6mg/kg,速效钾187.5mg/kg,pH值7.8。小区面积:4.0m×1.2m。记录除草剂可能对作物
带来的不利影响及记录施药后杂草的变化,比如不出苗、生育受抑、失绿、畸形、枯死等症状。在药效达高峰期时,调查单位面积杂草优势种株数。
杂草株数防效=(对照区杂草株数-处理区杂草株数)/对照区杂草株数×100%
具体检测结果如表1所示:
表1
由表1检测结果可知,本发明所得除草剂的除草效果得到了有效提高。
Claims (7)
1.一种功能型生物除草剂的制备方法,其特征在于具体制备步骤为:
(1)将杂草根与生理盐水按质量比为1:5~1:10混合后榨汁,再经过滤,得杂草根汁液;
(2)用杂草叶喂食3龄期蝗虫幼虫,直至生长至5龄期蝗虫,在蝗虫生长期间,每隔12~24h向蝗虫腹部注射3~5uL杂草根汁液;
(3)将5龄期蝗虫与磷酸盐缓冲液按质量比为1:10~1:12混合后榨汁、过滤,得蝗虫汁液;
(4)向蝗虫汁液中滴加蝗虫汁液体积4~8%的无水乙醇后,离心分离,收集下层沉淀物,再经真空冷冻干燥,得干燥下层沉淀物;
(5)按重量份数计,依次取4~8份壳聚糖,3~5份酪素,4~8份磷脂,4~6份混合剂,20~30份干燥下层沉淀物,80~100份水,先将壳聚糖、酪素和水搅拌混合后,静置溶胀,再加入磷脂、混合剂和干燥下层沉淀物,高速搅拌混合后,低温喷雾干燥,即得功能型生物除草剂。
2.根据权利要求1所述的一种功能型生物除草剂的制备方法,其特征在于:所述杂草为稗草、白茅、虾须草或狗牙草中的任意一种。
3.根据权利要求1所述的一种功能型生物除草剂的制备方法,其特征在于:步骤(1)所述生理盐水是由以下重量分数的原料配置而成:5~7份氯化钠,0.1~0.2份氯化钙,0.2~0.3份氯化钾,0.1~0.2份六水合氯化镁,0.10~0.15份碳酸氢钠,0.15~0.18份磷酸二氢钾,5~7份葡萄糖,1000~1200份水。
4.根据权利要求1所述的一种功能型生物除草剂的制备方法,其特征在于:步骤(3)所述磷酸盐缓冲液为pH为6.2~6.4的磷酸盐缓冲液。
5.根据权利要求1所述的一种功能型生物除草剂的制备方法,其特征在于:步骤(5)所述壳聚糖为脱乙酰度为90~95%的壳聚糖。
6.根据权利要求1所述的一种功能型生物除草剂的制备方法,其特征在于:步骤(5)所述磷脂为大豆卵磷脂或蛋黄卵磷脂中的任意一种。
7.根据权利要求1所述的一种功能型生物除草剂的制备方法,其特征在于:步骤(5)所述混合剂是由以下重量份数的原料组成:8~10份葡萄糖、4~8份天门冬氨酸、2~4份果糖、3~5份氯化钾和80~100份水。
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