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在杂交水稻的施肥技术上,一般认为“杂交水稻产量高,耗肥量亦大,亩产千斤,需施纯氮25—35斤。但在我省川西平原,因土地肥沃,日照不足,这种较高施肥水平是否适应,尚需深入研究。因此,我们通过三年不同施氮量的田间试验和较大面积的示范,结合植株的生理生化和同位素示踪测定,对杂交水稻合理施用氮肥及其合理的群体结构进行了研究。其目的是为杂交水稻高产、稳产、低成本的栽培,提供科学依据。
In hybrid rice fertilization techniques, it is generally believed that ”Hybrid rice has high yield, large amount of fertilizer consumption, heavy yield per kilogram, 25-35 pounds of pure nitrogen required, but in western Sichuan Plain, due to fertile land, lack of sunshine, Whether this higher fertilization level adapts or not needs to be studied in depth.Therefore, through three years of field experiments with different amount of nitrogen application and a large area demonstration, combined with physiological and biochemical and isotopic tracing of plants, we rationally applied hybrid rice Nitrogen fertilizer and its reasonable population structure were studied.The purpose is to provide a scientific basis for high yield, stable yield and low cost cultivation of hybrid rice.