杂交水稻不同留桩高度对再生稻产量的影响

[目的]确定合适的留桩高度,以便指导再生稻的生产。[方法]采用目前生产上推广的3个中稻品种(深两优5814、两优6326、新两优223),开展50、35和15 cm 3种不同留桩高度试验,分析再生穗的出苗速度、生育期、农艺性状、经济性状和产量等性状的变化规律。[结果]50、35 cm留桩高度处理再生穗的出苗速度、生育期、农艺性状、经济性状和产量等性状都优于15 cm低留桩高度处理。[结论]该研究进一步印证生产实践中留桩高度分别为50、35 cm为农民所接受。

Effects of Hybrid Rice Different Stubble Height on Yield of Ratooning Rice

[ Objective] The aim was to determine the suitable stubble height so as to guide the ratooning rice production. [ Method ] Three mid-season hybrid rice varieties of promoting in the current production（ Shengliangyou 5814, Liangyou 6326 and Xinliangyou 223 ） were taken as experimental materials to carry out 50, 35 and 15 cm- stubble height test, and then the change law of seedling emergence rate, growth period, agronomic traits, economic traits and yield traits of ratooning rice were analyzed. [ Result ] The seedling emergence rate, regeneration of growing period, agronomic traits, economic traits and yield traits of 50 and 35 em-stubble height treatments were better than those of 15 era-low stubble height treatment. [ Conclusion] The study further confirms that the production practice of 50 and 35 cmstubble height of hybrid rice was accepted by farmers.