摘要
杂交稻田有杂草３ ～４ 种，杂草覆盖度为１ ．６ ％ ，分别比粳稻田低６６ ％ 和９５ ％ 。杂交稻 汕优６３对鸭舌草、矮慈姑 和 水竹 叶的 控 制效 果 平均 为 ８９ ％ 。在 无 芒稗 ５０ 株／ ｍ ２ 干 扰 下， 杂交 稻 平 均减 产３ ．８ ％ ，而粳稻平均减产３４ ．７ ％ 。
There were 3～4 species of weeds in hybrid rice with a weed cover ratio of 1.6% which reduced in 66% and 95% respectively compared in japonica rice. Shanyou 63, a hybrid rice provided 89% control of Monochoria vaginalis, Sagittaria pygmaea and Murdannia triquetra . The rice grain yield was given the slight losses of 3.8% under barnyardgrass [ Echinocholoa crusgalli (L.)Beauv. var. mitis ] interference of 50 plants/m 2 in hybrid rice. However, japonica rice was suffered heavy losses of grain yield with 34.7%.
出处
《植保技术与推广》
1999年第5期25-26,共2页
Plant Protection Technology and Extension
基金
国家"九.五"攻关资助。
