光合作用抑制型除草剂灭草松最低有效使用剂量的测定  

Determination of Minimum Effective Dose on Photosynthesis Inhibiting Herbicide Bentazone

作　　者：赵秀梅[1] 王连霞[1] 郑旭[1] 刘洋[1] 王立达[1] 武琳琳[1] 迟莉[1] 

机构地区：[1]黑龙江省农业科学院齐齐哈尔分院,黑龙江齐齐哈尔161006

出　　处：《黑龙江农业科学》2017年第5期55-59,66,共6页Heilongjiang Agricultural Sciences

基　　金：齐齐哈尔市科学技术局农业攻关资助项目(NYGG-201512)

摘　　要：为进一步研究东北地区大豆田苗后茎叶化学除草,在大豆苗后杂草2~4叶期茎叶喷施不同剂量的480g·L^(-1)灭草松水剂,通过植物光合作用测定仪对大豆及一年生阔叶杂草的光合率进行测定,确定光合作用抑制型除草剂灭草松最低有效使用剂量。结果表明:灭草松对一年生阔叶杂草表现快速防除效果,一般在施药后5~10d杂草即干枯死亡,其中对刺蓼、苘麻表现非常敏感,对藜表现一般敏感,对反枝苋表现不敏感。当杂草的光合率值低于20%时,灭草松对杂草的株防效及鲜重防效大于90%,杂草得到有效防控;当光合率值高于40%时,灭草松对杂草的株防效及鲜重防效低于60%,杂草不能得到有效控制。使杂草的光合率低于20%,而对作物的光合率高于70%的剂量即为光合作用抑制型除草剂的最低有效使用剂量。以一般敏感杂草藜(2~4叶龄)为基准,光合作用抑制型除草剂灭草松的最低有效使用剂量为600g·hm^(-2)。In order to further study the herbicide of soybean field in northeast China, stem and leaves were sprayed different doses of 480 g· L-1 Bentazone AS in weeds 2-4 leaf stage after soybean seeding, photosynthetic rate of soybean and annual broadleaf weeds were determined by plant photosynthesis meter. The results showed that： Bentazone showed rapid control effect to annual broadleaf weeds,weeds went dry to death usually after spraying for 5-10 days, Polygonum bungeanum Turz. and Abutilon theophrasti Medic were very sensitive, Chenopodium album L. was general sensitive,Amaranthus retroflexus L. was insensitive. When photosynthetic rate of weeds was less than 20% ,Strains effect and fresh weight effect of weeds were more than 90% on Bentazone,Weeds were effectively controlled; when photosynthetic rate of weeds was more than 40 %, strains effect and fresh weight effect of weeds were less than 60 % on Bentazone, weeds were not effectively controlled. When photosynthetic rate of weeds was less than 20%, photosynthetic rate of crop was more than 70%, the dose was minimum effective dose on photosynthesis inhibiting herbicide. To general sensitive weed Chenopodium album L. （2-4 leaf age） as datum, the minimum effective dose of photosynthesis inhibiting herbicide Bentazone was 600 g·hm-2.

关 键 词：光合作用抑制型除草剂 灭草松 最低有效使用剂量 光合率 防除效果 

分 类 号：S451.224[农业科学—植物保护]