抗高效氟吡甲禾灵日本看麦娘生长速率与生长密度研究  

Research on Growth Rate and Planting Density of Japanese Foxtail (Alopecurus japonicus) Resistant to Haloxyfop-R-methyl

作　　者：张彬[1] 李俊[1,2] 董立尧[1,2] 

机构地区：[1]南京农业大学植物保护学院/农业部作物病虫害监测与防控重点开放实验室,江苏南京210095 [2]南京农业大学理学院/江苏省农药学重点实验室,江苏南京210095

出　　处：《杂草科学》2011年第2期43-46,共4页Weed Science

基　　金：国家自然科学基金(编号:30971928);国家博士点基金新教师类项目(编号:20090097120046)

摘　　要：抗性日本看麦娘种群与敏感种群种子在低温（4℃）清水浸泡处理超过6 d后萌发率均能达90%以上,但抗性种群休眠解除的时间要长于敏感种群;敏感种群在播种后的前15 d内生长速率快于抗性种群,但此后抗性种群生长速率逐渐超过敏感种群;抗性种群在播种后20 d开始长出第2片叶,比敏感种群晚2 d,播种后25 d两种群出现第2片叶的比例均超过95%,进一步说明在生长后期抗性种群生长速率超过敏感种群;在相同的播种密度下,抗性种群长势优于敏感种群,150~200株/0.11m2的密度范围内有利于日本看麦娘的生长,抗性种群的最佳生长密度为208株/0.11m2,而敏感种群为186株/0.11m2。The germination rate of Japanese foxtail（Alopecurus japonicus）in the resistant and sensceptible population to haloxyfp-R-methyl could reach to more than 90% after 6 days for water soaking at 4 ℃,but dormancy breaking in the resistant population needed more time than that of sensceptible population.The resistant population presented a lower growths rate than that of sensceptible population after 15 days of sowing,but after that date the growth rate in resistant poputation was getting higher than that of sensceptible poputation.The resistant population began to appear the second leaf after 20 days for sowing that was later than sensceptible population by 2days,and the rate for the second leaf appearance in both populations could reach to 95% affer 25 days of sowing which proved that the resistant population grew more rapidly than that of sensceptible population during the later period of growth time after sowing.The resistant population performed a better growth than that of sensceptible population under the same planting density.Japanese foxtail could grow well under the planting density of 150~200 plants/0.11m2.The suitable growth density for resistant population cowld he designed as 208 plants/0.11m2,but 186 plants/0.11m2 for sensceptible population.

关 键 词：日本看麦娘 解除休眠 生长速率 生长密度 

分 类 号：S451[农业科学—植物保护]