施田补对胡萝卜田杂草的防治效果研究

目的]探究施田补在青海西宁地区胡萝p田的使用效果并筛选最佳使用浓度。方法]通过小区试验设计研究了不同浓度（500、1000、1500、2000和2500倍液）施田补对胡萝卜生长的影响及对田间杂草的防治效果。结果]对胡萝卜田喷洒33％施田补1500倍液有显著的除草效果，增产效果达25％以上，不同时期的灭草率在92％以上，且使用安全。结论]施田补可在西宁地区胡萝卜田推广使用。

Control Effect of Pendimethaiin against Weeds in Carrot Field

Objective] The aim was to understand the application effect of Pendimethalin in carrot field of Xining area and screen the optimal dosage. Method] The control effects of different dosages of Pendimethalin against weeds in carrot field and the effects on growth of carrot were studied through trial test. Result ] It had significant herbicidal effect to spray 1 500 times of 33% Pendimethalin liquid; the yield was increased by more than 25% ; the weed-killing rate in different periods was more than 92%, and Pendimethalin was safe to carrot. Conclusion] Pendime- thalin can be used in carrot field of Xining area.