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试验研究了20%二氯喹啉酸.吡嘧磺隆WP对水稻直播田杂草的防治效果,以及杂草防除后对田间养分和水稻产量的影响。结果表明,每公顷使用20%二氯喹啉酸.吡嘧磺隆WP有效成分150～270 g对水稻直播田的稗草、鸭舌草、节节草、异型莎草等均具有良好的防除效果,施药后40 d综合密度防效和鲜重防效均达94%以上,显著优于对照药剂50%二氯喹啉酸WP和10%吡嘧磺隆WP。施用20%二氯喹啉酸.吡嘧磺隆WP能有效降低杂草对田间氮、磷、钾和水分的吸收,水稻增产效果显著。
The effect of pyrazosulfuron ethyl WP (20% quinclorac) WP on weeds in direct seeding rice and the effects of weed control on field nutrients and rice yield were studied. The results showed that 20% quinclorac was used per hectare. The active ingredient of pyrazosulfuron-ethyl WP (150 ~ 270 g) had good control effects on barnyardgrass, monocotyledon, arthropod, , 40 days after application of the integrated density control effect and fresh weight control effect reached more than 94%, significantly better than the control agent 50% quinclorac WP and 10% pyrazosulfuron WP. Applying 20% quinclorac, pyrazinulfuron WP can effectively reduce the uptake of nitrogen, phosphorus, potassium and water by weeds in the field, and the yield of rice is remarkable.