宁夏灌区大豆田化学药剂除草效果评价研究

Evaluation of the Effect of Herbicides in Soybean Fields in Ningxia Irrigation Area

应用4种化学药剂对宁夏灌区大豆田除草效果进行研究。结果表明:用药后15 d,防除禾本科杂草效果比较好的是8.8%精喹禾灵乳油+250 g/L氟磺胺草醚水剂处理和10.8%精喹禾灵乳油处理;其次为480 g/L灭草松处理,防效分别达到98.2%、97.1%、87.8%。防除阔叶杂草效果比较好的是8.8%精喹禾灵乳油+250 g/L氟磺胺草醚水剂处理和480 g/L灭草松处理;其次为10.8%精喹禾灵乳油处理,防效分别达到95.4%、94.5%、87.3%。用药后30 d,防除禾本科杂草效果比较好的是8.8%精喹禾灵乳油+250 g/L氟磺胺草醚水剂处理和10.8%精喹禾灵乳油处理,防效分别达到95.7%、93.6%;防除阔叶杂草效果较好的是8.8%精喹禾灵乳油+250 g/L氟磺胺草醚水剂处理,防效达到91.2%。喷施4种除草剂的处理均较对照大豆产量具有不同幅度的增产,其中8.8%精喹禾灵乳油+250 g/L氟磺胺草醚水剂处理较对照增产669.0 kg/hm^(2),增产16.5%。

Weed control effect of 4 kinds of chemical agent,in soybean fields in irrigation area of Ningxia was studied in this paper.The results showed that after 15 days,8.8%quizalofopp-ethyl EC+250 g/L fomesafen treatment and 10.8%quizalofopp-ethyl EC treatment had better control effect for gramineae weeds,and then came 480g/L bentazone treatment;The efficacy was 98.2%,97.1%and 87.8%,respectively.8.8%quizalofopp-ethyl EC+250 g/L fomesafen treatment and 480 g/L bentazone treatment had better control effect for broad-leaved weeds,and then came 10.8%quizalofopp-ethyl EC;The efficacy was 95.4%,94.5%and 87.3%,respectively.After 30 days,8.8%quizalofopp-ethyl EC+250 g/L fomesafen treatment and 10.8%quizalofopp-ethyl EC treatment had better control effect for gramineae weeds;The efficacy was 95.7%and 93.6%,respectively.8.8%quizalofopp-ethyl EC+250 g/L fomesafen had better control effect for broad-leaved weeds;The efficacy was 91.2%.Compared with the CK,the 4 kinds of chemical agents can all made yield of soybean increase.Compared with the CK,8.8%quizalofopp-ethyl EC+250 g/L fomesafen treatment made the yield increase by 669.0 kg/hm^(2),increasing 16.5%.