农艺措施对线状匍匐茎藨草发生的影响  

Effects of agronomic practices on occurrence of Scirpus lineolatus

作　　者：沈国辉[1] 张士新 张建汉 李涛[1] 冯丽菊 沈杰 钱振官[1] 王风波 支凤高 孙永斌 

机构地区：[1]上海市农业科学院生态环境保护研究所,上海201106 [2]上海万事发实业总公司现代生态农业研究发展中心,上海202178

出　　处：《上海农业学报》2009年第4期1-4,共4页Acta Agriculturae Shanghai

基　　金：上海市农业"四新"技术推广项目"水稻高产高新技术集成创新示范工程"(沪农科推字2005第1-2号)资助

摘　　要：在摸清线状匍匐茎藨草田间发生消长动态和分布型的基础上,开展了不同茬口模式、翻耕深度等农艺措施对线状匍匐茎藨草出苗影响的研究。结果表明:线状匍匐茎藨草在水稻播种后即出苗,3个月内持续快速增长,每周平均增加391.57株/m^2;线状匍匐茎藨草在田间呈集群分布;与水稻-麦子-水稻茬口相比,西瓜-麦子-水稻茬口可减少线状匍匐茎藨草发生量85%以上;线状匍匐茎藨草随土层翻耕深度的增加发生数量逐渐减少,使用农机具田间翻耕深度14～16 cm较浅耕(8～10 cm)可减少线状匍匐茎藨草发生量64.4%。The effects of such agronomic practices as pattern of crop rotation and ploughing depth on the emergence of S. lineolatus were studied on the basis of surveying its population dynamics and distribution. The results showed that S. lineolatus emerged immediately after sowing rice seeds,and in the first 3 months the number of emergence grew rapidly at average 391.57 plants/m^2 every week. The plants＇distribution in field was in clusters. Compared with the crop rotation rice-wheat-rice, the crop rotation watermelon-wheat-rice could decrease the plants by over 85%. Also the emergence of S. line- olatus declined gradually with ploughing depth increasing. Compared with a shallow ploughing depth of 8- 10 cm, the ploughing depth of 14- 16 cm could reduce the population of S. lineolatus by 64. 4%.

关 键 词：线状匍匐茎藨草 种群动态 杂草防除 农艺措施 

分 类 号：S451[农业科学—植物保护]