“千金”对直播稻田千金子的防治效果研究  

Control Result of “Qianjin” to Moleplant Seed in Direct Sowing Rice Field

作　　者：张学友[1] 陈小波[1] 沈俊明[1] 韩娟[1] 冒宇翔[1] 

机构地区：[1]江苏沿江地区农业科学研究所,江苏如皋226541

出　　处：《南京农专学报》2000年第4期15-19,共5页Journal of Nanjing Agricultural Technology College

基　　金：江苏’95重大攻关项目!"稻田草害技术";南通市科委项目!"稻田恶性杂草千金子繁制技术研究"

摘　　要：直播水稻具有省工、节本、产量潜力高等优点 ,直播稻苗与杂草无时差、位差 ,不存在“空间”竞争优势 ,增加了杂草的危害程度 ,尤其是千金子 ,对目前稻田常用除草剂不敏感 ,已逐渐成为直播水稻田间的恶性杂草 ,部分地块甚至因其猖獗危害而绝收。 1 998、 1 999年以千金与苄黄隆混用防治直播水稻田杂草两年的试验研究表明 ,千金作为直播稻田在秧苗早期使用对水稻生长发育安全 ,用量 45 0～ 75 0 ml· hm- 2 ,对千金子防治效果可稳定在 95 %以上 ,同时对稗草可达 80 %以上的兼治作用。千金与苄黄隆混用 ,在秧苗 2～ 3叶期用千金 75 0 ml· hm- 2加苄黄隆 2 2 5～ 3 0 0 g·hm- 2 ,对直播稻田杂草的防治效果达 95 %以上。Because of no differences with weeds in time and location, direct sowing rice with labor saving, low investment and high yield potential also has some shortages in competition for space, so the harm degree of weeds is increased, such as moleplant seed which is unsusceptible to normal weed killers and becomes a severe weed. The authors had a two year research on preventing and controlling weeds in direct sowing rice field with mixed using Qianjin and Bianhuanglong in 1998 and 1999. The results show that when using Qianjin with the amount of 450～750 ml·hm -2 in the early period of young plant for direct sowing rice, it is safe for rice and the percentage of control to moleplant seed reaches above 95%, and above 80% to panic grass at the same time; if mixed using Qianjin with 750ml·hm -2 and Bianhuanglong with 225～300 g·hm -2 at the stage of 2 or 3 leaf of young plants, the percentage of control to weeds in direct sowing rice field can reach above 95%.

关 键 词：千金子 苄黄隆 直播稻田杂草 除草剂 药效试验 

分 类 号：S451.21[农业科学—植物保护] S482.4