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作者对麦田阔叶杂草调查结果表明,麦田常发性阔叶杂草20种,为害严重的8种,发生特点是前早、中缓、后快。作者选用高重积作为麦田阔叶杂草群落划分的标准。研究表明,阔叶杂草的各项生物指标经相关检验,以鲜重与小麦产量间关系密切。阔叶杂草对小麦产量的影响,经SSR检验,5～10株产量差异显著,经计算机模拟,1994年阔叶杂草密度(株/m~2)、鲜重(g/m~2)与小麦产量损失率间为显著的线性关系。株数Y=3.0418+1.4314X(r=0.9993,残差平方和为0.3034)、鲜重Y=1.0445+0.0366X(r=0.9931,残差平方和为3.1275)。求出麦田阔叶杂草的生态经济阈值及生态经济除草阈值,并根据阈值结果提出了麦田阔叶杂草经济防除意见。
The author of broad-leaved weed wheat field survey showed that 20 kinds of broad-leaved weed in the wheat field, severely damaged 8 species, characterized by early onset, slow, fast. The author chooses the high-weight product as the criterion for dividing the broad-leaved weed community in wheat field. Studies have shown that the broadleaf weed biological indicators by the relevant test to fresh weight and yield of wheat are closely related. The effects of broadleaf weeds on the yield of wheat were studied. The results of SSR showed that the yield of 5 ~ 10 plants was significantly different. The density of broadleaf weeds in 1994 (m ^ 2), fresh weight (g / m ~ 2) And wheat yield loss rate is a significant linear relationship. The number of trees Y = 3.0418 + 1.4314X (r = 0.9993, residual square sum of 0.3034), fresh weight Y = 1.0445 + 0.0366X (r = 0.9931, residual sum of squares is 3.1275). The ecological economic threshold and ecological economic weeding threshold of broad-leaved weeds in wheat field were determined. According to the threshold results, the economic control opinions of broad-leaved weed in wheat field were put forward.