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通过对小麦田主要杂草藜、野燕麦不同密度对小麦产量构成因素的影响 ,及防治中生态经济阈值模型的初步研究 ,建立了藜、野燕麦不同密度与小麦有效穗数、小穗数、穗粒数、千粒重和小麦产量损失率间的函数关系式 ,明确了藜、野燕麦不同密度对构成小麦产量各因素影响作用 ,制定出适合当地杂草藜和野燕麦的生态经济阈值 ,即田间藜密度达到 1 4 5～ 1 83株 /m2 时 ,野燕麦密度达 7 15～ 8 60株 /m2 时 ,分别使用 72 % 2 ,4 D丁酯乳油和 10 %骠马乳油进行化学防治。
Through the preliminary study of the impact of the different density of the main weeds Quinoa and wild oats on the yield components of wheat in wheat field and the ecological economic threshold model in the prevention and control, the relationship between different density of quinoa and wild oats and the number of effective panicles, spikelets, Grain weight per spike, grain weight per 1000-grain weight and yield loss of wheat, the effects of different densities of quinoa and wild oats on the factors that make up wheat yield were clarified, and the ecological and economic thresholds suitable for the local weeds Quinoa and wild oats were established, that is, When the density of quinoa reached 145 ~ 1 83 plants / m2 and the density of wild oats reached 7 15 ~ 8 60 plants / m2, the chemical control was 72% 2, 4 D butyl ester EC and 10% RSM respectively.