不同土壤处理除草剂对河北滨海盐碱棉田杂草的防除效果

Control Efficacy of Different Soil-applied Herbicides on Weed of Coastal Saline Cotton Fields in Hebei

[目的]明确滨海盐碱棉区常用土壤处理除草剂对棉田杂草的防除效果。[方法]通过播种期不同施药时间及氟乐灵不同混土深度处理,比较供试除草剂对杂草的防效。[结果]3种除草剂对禾本科杂草防效优于阔叶杂草,氟乐灵株防效最高,分别为88.5%和85.3%;施药时间上,播前+播后处理防效最高;氟乐灵混土效果以深耙(5 cm)优于浅耙(2 cm)。[结论]供试除草剂对滨海盐碱棉田杂草具有较好的防除效果,药剂选择、施药时间及混土是提高防效的关键。

[Aims] This study aims to clarify the control efficacy of herbicides on cotton weeds in coastal saline soil cotton area. [Methods] The effects oftrifluralin at different spraying time and different mixed soil depth were studied. [Results] The results showed that these three kinds of herbicides had good control effect on cotton weeds, and the control efficacy of gramineous weeds was better than that of broadleaf weeds, the plant control effect of trifluralin to gramineous and broadleaf weeds was 88.5 and 85.3%, respectively. The selection of spraying time had a significant effect on the control efficacy, before sowing and after sowing exhibited the highest control efficacy. The mixed soil played an important role for trifluralin, the efficacy of mixed soil depth about 5 cm was better than 2 crrL [Conclusions] The tested soil-applied herbicides had good control effect on the weeds in the coastal saline cotton fields in Hebei. However, the research on the selection,, spraying time and mixed soil depth was the key to improve the control efficacy of herbicides on cotton weeds.