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采用模拟试验方法研究新农药单甲脒对棉花、大豆种群生物量和结构的影响．结果表明，单甲脒对作物种群生物量和结构的影响因浓度和作物种类而不同．与对照比较，１０００倍稀释液处理的棉花、大豆地上和地下部分生物量都高于对照，有促进作用；１０倍处理的棉花地上、地下部分生物量明显低于对照，而大豆生物量５０倍已明显低于对照．单甲脒对作物生产结构的影响，１０００、５００、１００倍处理的棉花，有一定促进作用，以５００倍处理的最明显．同化系统最高数量的一层可为对照的２．５倍，非同化系统数量也高于对照，１０００倍处理的最明显，可为对照的１．５倍．１０倍处理的棉花同化、非同化系统各层数量变化，与对照比差别显著，叶层、根量、高度都受到抑制．单甲脒对大豆种群结构影响也依浓度和酸度而变化，１０００倍处理的同化、非同化系统数量比对照高，有促进作用，分别比对照提高２．２倍和１倍，而５０倍处理的大豆，生产结构已明显受抑制．光照强度与作物的光合速率与各层同化系统数量有相互影响的关系．说明单甲脒稀释液的浓度与酸度对作物种群的影响，也同样反映在种群的生物量和生产结构上．
The effects of the new pesticide monoamidine on the biomass and structure of cotton and soybean populations were studied by using the simulation test. The results showed that the effect of amitraz on biomass and structure of crop populations varied with the concentration and crop type. Compared with the control, the biomass of above-ground and underground parts of cotton and soybean treated with 1000-fold diluted was higher than that of the control, and the biomass of 10-fold-treated cotton was obviously lower than that of the control while the biomass of soybean was 50 times Has been significantly lower than the control. Monamidine on the structure of crop production, 1000,500,100 times the treated cotton, a certain role in promoting, the most obvious deal with 500 times. The maximum number of assimilation system layers can be 2.5 times that of the control, and the number of non-assimilation systems is also higher than that of the control. The most obvious one is 1000 times, which can be 1.5 times of the control. The changes of the numbers of assimilation and non-assimilation systems at 10-fold treatments were significantly different from those of the control, and the leaf layers, root volume and height were all inhibited. The effect of monoamidine on the structure of soybean population also varied according to the concentration and acidity. The number of assimilation and non-assimilation systems at 1000-fold treatment was higher than that of the control, which was 2.2 times and 1 times higher than that of the control, respectively. Of soybean, the production structure has been significantly inhibited. The relationship between light intensity and crop photosynthetic rate and the number of assimilation systems in each layer have an impact on each other. Explain the impact of the concentration and acidity of the monoamidine dilution on the crop population is also reflected in the biomass and production structure of the population.