[目的]筛选适宜糜子生产的除草剂。[方法]通过小区试验研究不同除草剂对糜子田间主要杂草的防除效果。[结果]57%2,4-D丁酯乳油、56%2甲4氯钠盐可湿性粉剂对糜子田间杂草有一定的防除效果。喷药后15和30 d 56%2甲4氯钠盐可湿性粉剂的株防效分别为81.32%和87.92%,其鲜重防效高于57%2,4-D丁酯乳油。与喷施清水不除草处理相比,喷施56%2甲4氯钠盐可湿性粉剂、57%2,4-D丁酯乳油处理糜子的增产率分别为97.36%、59.61%。56%2甲4氯钠盐可湿性粉剂对糜子田间杂草的防除效果优于57%2,4-D丁酯乳油。[结论]试验结果为糜子田间杂草的化防提供了理论依据。
[Objective] The effects of different tillage techniques on dry matter accu- mulation, soil water content, water use efficiency and yield of broomcom millet were studied. [Method] With Jinsu 9 as an experiment material, the effects of deep tillage, traditional tillage and no tillage and rotary tillage on dry matter accumulation, soil water content, water use efficiency and yield of broomcom millet were investi- gated. [Result] Dry matter accumulation rate and accumulated amount were signifi- cantly higher in the deep tillage, no tillage and rotary tillage treatments than in the conventional tillage treatment, and the highest in the deep tillage treatment. The soil water content of the deep tillage treatment at 0-100 cm was higher than those of other tillage techniques, deep tillage also exhibited the highest soil water storage, and water use efficiency values were in order of deep tillage〉rotary tillage〉no tillage〉conventional tillage. The deep tillage treatment also showed the highest grain weight per spike, 1 000-grain weight and yield, while conventional tillage exhibited the lowest values, indicating that deep tillage is most beneficial to improvement of yield and water use efficiency of broomcom millet. [Conclusion] This study provides a scientific basis for water use efficiency of broomcorh millet in its main producing areas.
