摘要
经调查,桃源县直播稻田杂草发生特点主要表现为:发生时间长;有3个出草高峰,即播后7～10 d、15～20 d、35～50 d。有利杂草发生的成因主要是直播稻田干湿交替时间长,水稻前期竞争力弱,秧苗期和本田期整个生育期长等。针对杂草发生特点,因地制宜提出了选取"除、封、杀、补(或拔)"的杂草综合防除对策。
The major characteristics of weeds occur in direct sowing rice field in Taoyuan County are as follows： long occurrence time; there are three germination peaks, which are 7-10 days, 15-20 days and 35-50 days after sowing. The favorable causes for weeds occurrence mainly are as follows： long alternate time of dry-wet in direct sowing rice field, weak competitive power in prophase of rice growth, long whole growth period （seedling period and growth period）. According to these characteristics of weeds occurrence, the integrated control strategies for local status were proposed, which are removing, sealing, killing and pulling.
出处
《湖南农业科学》
2010年第2期82-84,共3页
Hunan Agricultural Sciences
关键词
直播稻
杂草
特点
成因
防除
direct sowing rice
weed
characteristic
cause
control
