摘要
分别于2010和2011年,采用田间定点观测法和添加试验法,研究了大豆田鳢肠发生动态及其与大豆的竞争关系。结果表明:鳢肠出草高峰期为大豆播后第12～18天;鳢肠在大豆播后第40天进入株高和鲜重的快速增长期,比大豆推迟20 d。每平方米大豆有效株数、单株有效荚数和大豆产量均随着鳢肠密度的增加而显著下降,大豆理论产量损失率(Y)与鳢肠密度(X)之间符合二次曲线方程:Y=-0.038X2+3.147X+3.746(r2=0.971)。
Point-survey and additive experiment were adopted to study the occurrence dynamics of Eclipta prostrata and its competition with soybean in 2010s and 2011s.Results showed that the emergence fastigium was observed 12-18 days after sowing of soybean.The rapid increasing period of plant height and fresh weight of E.prostrata occurred at 40 days after sowing of soybean,which was later than soybean by 20 days.Moreover,the number of productive plant,pod number per plant and yield of soybean were declined significantly with increasing density of E.prostrata.The correlation between weed density and percentage soybean yield loss followed：Y=-0.038X2＋3.147X＋3.746（r2=0.971）.
出处
《大豆科学》
CAS
CSCD
北大核心
2012年第5期789-792,共4页
Soybean Science
基金
国家"十一五"科技支撑计划项目(2006BAD08A09)
中国农业科学院杂草害鼠生物学与治理重点开放实验室开放课题
江苏省农药学重点实验室开放课题(NYXKT201003)
关键词
鳢肠
发生动态
大豆
竞争关系
Eclipta prostrata
Occurrence dynamics
Soybean
Competition relationship
