雀麦对小麦危害损失及防除指标研究

Studies on Damaging of Brome to Wheat and Its Controlling Index

本文研究了雀麦对小麦经济产量的影响程度及与组成小麦产量结构之间的关系。结果表明,田间雀麦每增加1万穗/hm^2,小麦减产2.12 kg(回归关系式y=4481.7-2.12x)。根据危害损失和生产实际,将雀麦发生程度区分为0、1、2、3、4、5六个等级,提出了不同类型麦田雀麦发生量和应采取的防除策略;初步确定了麦田雀麦防除指标为50.8穗/m^2或10.3株/m^2,为因地制宜开展雀麦防除提供了科学依据。

This paper deals with the affection degrees of Bromiis japonicus to wheat economic yield and the relation to the factors of wheat yield structure.The result showed that wheat yield reduced 2.12 kilograms, while the field brome amount increased to each 10,000 ears (the regression equation; y=298.78—2.12x±9.67).Relying on the damage and actual production, six occurrence amount degrees of brome were provided, i.e.0,1,2,3,4,5.The brome occurrence amount in different type fields and the related controlling methods were also provided.The reference controlling index for brome in wheat field is 50.8 ears/m^2.