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野燕麦是江苏省里下河地区部分冬小麦田的一种恶性杂草,自1987年零星发生以来,发生面积不断扩大,危害逐年加重。一般小麦减产10～20％,重者减产40～50％,成为三麦持续增产的严重威胁。为有效控制野燕麦的危害,笔者于1990～1992年对野燕麦的生物学特性和防除方法进行了研究。一、内容与方法 (一) 出苗特性观察 1.种子不同吸水时间的出苗率:将当年6月收集的野燕麦种子,晒干后分种子吸水时间0、6、12、18、24、30小时6个处理,重复3次,播于培养皿内。每个培养皿播种100粒,随后移入
Wild oat is a kind of malignant weed in some winter wheat fields in the Lixiahe area of Jiangsu Province. Since sporadic occurrence in 1987, the area has been expanding constantly, and its harm has been increasing year by year. General wheat cut 10 to 20%, heavy cut 40 to 50%, as a serious threat to the continued production of three wheat. In order to effectively control the damage of wild oats, the author studied the biological characteristics and control methods of wild oats from 1990 to 1992. First, the content and methods (A) observation of the emergence of seedlings 1. Seed germination rate of different water absorption time: the wild oat seeds collected in June of the same year, after drying seed sub-water absorption time 0,6,12,18,24,30 hours 6 treatments, repeated 3 times, broadcast in Petri dishes. Each dish was seeded with 100 pieces and then moved in