几种除草剂对不同麦类品种的效应

1991～1993年对50个麦类品种和4个除草剂效应进行了研究。一种除草剂对不同的麦类品种在出苗数、百株苗分蘖数、百株苗鲜重的抑制率有差异,不同的除草剂对一个麦类品种也产生不同的抑制率。从中选出14个品种用甲黄隆超微WP ai 0.5g/666.7m~2进行喷雾处理作产量测定,增产率最高的是浙麦4号,为24.18％,增产率最低的是扬87—158,为0.67％。浙麦1号上几种除草剂的比较试验,增产率最高的是绿黄隆超微WP ai 0.75g/666.7m~2,为33.3％,增产率最低的是丁草胺60％EC75ml/666.7m~2,为16.8％。试验结果表明,甲黄隆在浙麦1号上的最佳施用期是播后芽前至一叶一心期,最佳施用量是ai 0.3～0.4g/666.7m~2。

EFFECTS OF SEVERAL HERBICIDES ON DIFFERENT WHEAT CULTIVARS

Interactive effects between 50 wheat cultivars and 4 herbicides had been studied from 1991 to 1993. The inhibitory percentage of seedling emergence, tiller numbers and fresh weight per hundred seedlings of various wheat cultivars was different when they were treated with the same herbicide. The inhibitory effect was also different when the same wheat cultivar was treated with various herbicides, Fourteen cultivars were selected and sprayed with methsuifuron-methyl (supermicro, 10WP) at 0. 5g ai/666. 7m2 for the yielding test of the tested cultivars, cv. Zhemai No. 1 showed the highest yield increase of 24. 18%, and cv. Yan 87-158 gave the lowest rates of 0. 67% after the herbicide treatment. Comparison test of herbicides was made in cv. Zhemai No. 1 to observe the effect on wheat yield. The treatment with chlorsulfuron (supermicro, 25WP) at 0. 75g ai/666. 7m2 showed the highest yield increase of 33. 3%, and the treatment with butachtor (60EC) at 75ml/666. 7m2 gave the lowest increase of 16. 8%. The suggesed application time and doses for methsuifuron-methyl (supermicro, 10WP) on cv. Zhemai No. 1 were from postsowing and pregermination through 1-leave seedling stage at 0. 3 -0. 4g ai/666. 7m2.