旱种技术对水稻粒重的影响

Effects of Interaction between Variety and Soil Type on the Main Characters and Quality of Flue-cured Tobacco

[目的]研究旱种技术对水稻粒重的影响。[方法]采用三因素二次回归旋转组合设计,研究旱种时施氮量、基肥施氮比例、点播密度及其互作对水稻华优3号粒重的影响。[结果]提高基肥施氮比例、基肥施氮比例与施氮量的互作可以显著提高水稻粒重;提高施氮量、点播密度,基肥施氮比例、施氮量与点播密度的互作将显著降低水稻粒重。施氮量、基肥施氮比例极显著影响水稻粒重。点播密度对水稻粒重没有直接影响,但其与基肥施氮比例、施氮量的互作对降低水稻粒重的影响最大。[结论]对于不同的水稻品种,合理施用肥料,控制点播密度可以提高水稻的粒重,进而提高产量。

[ Objective] The purpose was to study the influence of dry seeding technique on the grain weight of rice. [ Method ] The quadratic regression - rotation combination design with 3 factors was used to study the influences of N application rate, proportion of N application in base fertilizer, dibbling density and their interactions on the grain weight of rice Huayou 3 planted by dry seeding technique. [ Result ] The enhancements of proportion of N application in base fertilizer and interaction between it and N application rate could significantly enhance the grain weight of rice. The enhancements of N application rate, dibbling density, interaction among proportion of N application in base fertilizer, N application rate and dibbling density would significantly decrease the grain weight of rice. N application rate and proportion of N application in base fertilizer extremely significantly affected the grain weight of rice. Dibbling density had no direct influence on the grain weight of rice, but its interaction with proportion of N application in base fertilizer and N application rate had biggest influence on decreasing the grain weight of rice. [ Conclusion] As for different rice varieties, reasonable fertilization and controlling dibbling density could enhance the grain weight of rice so as to enhance the yield.