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| 抛栽水稻田间杂草生态防治阈期 | |
| 引用本文： | 李永丰,娄群峰,吴竞仑,周恒昌,刘丽萍.抛栽水稻田间杂草生态防治阈期[J].江苏农业学报,2004,20(4):244-248. |
| 作者姓名： | 李永丰 娄群峰 吴竞仑 周恒昌 刘丽萍 |
| 作者单位： | 1. 江苏省农业科学院植物保护研究所,江苏,南京,210014 2. 江苏省农业科学院农业现代化研究所,江苏,南京,210014 3. 江苏省仪征市农业生产资料公司,江苏,仪征,214400 |
| 基金项目： | 国家"十五"科技攻关项目(2001BA509B07);江苏省科技攻关专题(BE2001347);江苏省科技厅应用基础项目(BJ97129) |
| 摘 要： | 通过多年多点试验 ,建立抛栽水稻大田立苗后有草天数或无草天数与水稻产量损失率之间的函数关系 ,以探明抛栽水稻田间杂草的生态防治阈期。结果表明 :抛栽水稻田间杂草的生态防治阈期 ,汕优 6 3为抛后 14～ 2 3d ;武运粳 8号为抛后 12～ 31d ,此时水稻处于 6叶期至 8叶期 ,此阈期的始期和终期为田间杂草密度及生物量的快速增长期。在此阈期内保持田间无草 ,既能使杂草造成的水稻减产率低于 3% ,又能充分发挥杂草在田间生态系统中所起的积极作用 |
| 关 键 词： | 水稻 杂草 生态防治阈期 |
| 文章编号： | 1000-4440(2004)04-0244-05 |
| 修稿时间： | 2004年4月29日 |
Threshold Period of Weed Control in Rice Field of the Seedling Transplanted by Throwing |
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| LI Yong-feng,LOU Qun-feng,WU Jing-lun,ZHOU Heng-chang,LIU Li-ping.Threshold Period of Weed Control in Rice Field of the Seedling Transplanted by Throwing[J].Jiangsu Journal of Agricultural Sciences,2004,20(4):244-248. | |
| Authors: | LI Yong-feng LOU Qun-feng WU Jing-lun ZHOU Heng-chang LIU Li-ping |
| Institution: | LI Yong-feng~1,LOU Qun-feng~2,WU Jing-lun~1,ZHOU Heng-chang~3,LIU Li-ping~1 |
| Abstract: | Field experiments were conducted in paddy to study the functional relationships between the weedy or weed-free days and the yield loss rate of rice transplanted by throwing,and determine the threshold period of weed control in rice field. The results indicated that the critical period for weed control in rice transplanted by throwing was about 14 to 23 days for Shanyou 63 or about 12 to 31 days for Wuyunging 8 after throwing,which was about 6 to 8 leaf age of rice. Marked increase in density and biomass occurred at both ends of the critical period. Weed-free period treatment during the critical period was able to not only ensure rice yield loss less than 3% level, but also maximally utilize the beneficial role of the weed in field ecology system. |
| Keywords: | rice weed threshold period of weed control |
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