不同耕作方式对糜子产量及水分利用效率的影响

目的]明确不同耕作方式对糜子的水分利用效率及产量的影响.方法]采用深耕、传统耕作、免耕、旋耕4种耕作方式,以晋黍9号为材料,研究不同耕作方式对糜子干物质积累量、土壤含水量、水分利用效率以及产量的影响.结果]深耕、免耕、旋耕这3种耕作措施的干物质积累速度和积累量要明显高于传统耕作,且深耕最为明显;深耕在0～100 cm处的土壤含水量高于其它耕作方式,且土壤贮水量最大,水分利用效率排序依次为深＞旋＞免＞传;穗粒重、千粒重和产量都以深耕处理的最大,传统耕作方式的最小.表明在4种耕作方式中,深耕有利于糜子产量和水分利用效率的提高.结论]该研究为糜子主产区提高水分利用效率提供了科学依据.

Effects of Different Tillage Techniques on Yield and Water Use Efficiency in Broomcorn Millet

Objective] The effects of different tillage techniques on dry matter accumulation,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 investigated.Result] Dry matter accumulation rate and accumulated amount were significantly 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 broomcorn millet.C.onclusion] This study provides a scientific basis for water use efficiency of broomcom millet in its main producing areas.