摘要
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。
In this paper, studies on broadleaf weeds in wheat field, showed that 20 breadleaf weeds, 8 of which were most serious, and often appeared in wheat fields. Their appearance characters were early at earlier stage, slow at middle stage and fast at later stage. Product of height multiplied by weight was used as a standard to classify community for broadleaf weeds in wheat fields. Examining the biological targets of broadleaf weeds, there was a closer relationship between the fresh weight and wheat field. By the SSR determination on the effect for broadleaf weeds to wheat field, the difference of 5 - 10 weeds was significant. The relationship among the density (plant/m2) fresh weight (g/m2) of broadleaf weeds and the loss rate of wheat field was striking linear relation. No. of plant Y = 3. 0418 + 1. 4314X (r = 0. 9993 * ' , sum of squares for residual = 0. 3034). Fresh weight Y = l. 0445 + 0. 0366X(r = 0. 9931* ,sum of squares for residual = 3. 1275). Eco-economic threshold and its control threshold for the broadleaf weeds in wheat field was found out. According to the threshold, suggestions on economic control of broadleaf weeds was put forward.
出处
《植物保护学报》
CAS
CSCD
北大核心
1998年第2期175-180,共6页
Journal of Plant Protection
基金
黑龙江省自然科学基金
