江西农业学报2011，Vol.23Issue(10)：121-124,127,5.
稻田双穗雀稗生物学特性、发生危害及防控
Biological Characteristics, Occurrence, Damage and Control of Paspalum distichum in Rice Field
摘要
Abstract
The middle and late rice fields in the northeast, center and southwest part of the Poyang Lake area were sampled and surveyed in 2010, the results indicated that the occurrence frequency of Paspaium distichum L. Was from 70.69% to 86.21% in the rice field, and the occurrence density of this weed was 0. 12 ~0.29 plants per square meter. The rice yield loss caused by Paspaium distichum in mechanically - transplanted late rice fields was determined, it was found that the rice yield loss had obvious positive correlation with the density and plant fresh weight of Paspaium distichum, and the number of productive ear and the filled grains per ear played main role in yield loss components. When there were 1, 2, 3 or 5 plants Paspaium distichum in 1.26 square meter rice field, the corresponding rice yield loss rate reached 17.24% , 27.33% , 49.13% or 57.78% , and one plant Paspaium distichum per square meter could reduce rice yield by 11.0% ~ 17.0%. The paper put forward the following integrated techniques for the control of Paspaium distichum: weeding before plough, controlling the weed by agronomic measures, using selective herbicides at seedling stage.关键词
双穗雀稗/生物学特性/水稻产量损失率/防控技术/鄱阳湖区Key words
Paspaium distichum/Biological characteristics/Loss rate of rice yield/Control technique/Poyang Lake area分类
农业科技引用本文复制引用
王修慧,陆永良,廖冬如,李浩元,余柳青,邱任华..稻田双穗雀稗生物学特性、发生危害及防控[J].江西农业学报,2011,23(10):121-124,127,5.基金项目
国家现代水稻产业技术体系专项(nycytx-01). （nycytx-01）
