春小麦田藜和野燕麦生态经济阈值模型的初步研究

Preliminary Study on Eco economic Threshold Model for Chenopodium album L and Avena fatua L.in Spring Wheat Field

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。

The function equations between the different density of Chenopodium album L ,Avena fatua L.and wheat spica,spikelet,spica gains,thousand kernel weight and yield reduction rate were established by studying the effect of Chenopodium album L ,Avena fatua L.density on wheat yield factors,and their eco economic threshold model.The result showed Chenopodium album L.and Avena fatua L.should be controled using 72% 2,4 D butylate and 10% Puma super when their density in field were up to 1 45-1 83 plants/m 2,7 15-8 60 plants/m 2 respectively.