Effect of Inorganic Encapsulated Slow-Release Fertilizer on Rice Growth and Nitrogen Fertilizer Utilization
Research on disposable fertilizer products and supporting application technologies that match nu-trient supply and demand above and below the ground of plant,safeguard yields and improve nitrogen fer-tilizer utilization efficiency is an urgent need for modernized,scaled-up,and light-simplified rice produc-tion.This paper explores the one-time application technology of inorganic encapsulated slow-release fertil-izer to provide a theoretical basis for the strategy of fertilizer application for highly efficient absorption of nutrient,and environmentally friendly and precise and light management of rice.In this study,we used the pot experiment method and set up four fertilizer treatments:no fertilization(CK),conventional split fertilization(FP),one-time application of inorganic encapsulated slow-release fertilizer(DF)and 20％re-duced one-time application of inorganic encapsulated slow-release fertilizer(JF),to compare the differ-ences in growth and development of rice,dry matter and nitrogen accumulation and transfer pre-flowering and post-flowering,yields,the characteristics of soil inorganic nitrogen dynamics,and the efficiency of ni-trogen fertilizer utilization.The results showed that the rice yield of one-time application of inorganic en-capsulated slow-release fertilizer DF treatment reached 8 403.57 kg/hm2,increased by 13.01％compared with conventional split fertilization FP treatment,while the yield of 20％reduced one-time application of inorganic encapsulated slow-release fertilizer JF treatment was not significantly different from that of the FP treatment.DF treatment could improve the pre-flowering dry matter transfer and the post-flowering dry matter production.The contribution of the post-flowering dry matter production to the yield of grains was 16.84％higher than that of the FP.DF and JF treatments promoted the development of rice root sys-tem,and the total root length at tillering stage reached 455.84-530.42 cm,which was 12.13％and 30.48％higher than that of FP,respectively.The soil inorganic N concentration of DF and JF treatments(59.45-14.96 mg/kg)was always higher than that of FP(55.84-12.71 mg/kg)in the whole growth period.Compared to FP,the agronomic efficiency of nitrogen fertilizer,the recovery rate of the current season and the bias productivity of nitrogen fertilizer of DF treatment was significantly higher by 23.01％,63.80％and 13.01％,respectively.One-time basal application of inorganic encapsulated slow-release fer-tilizer can achieve increased rice yield and significantly improved nitrogen utilization,providing fertilizer products and feasible fertilizer application strategies for high-yield,high-efficiency and light-simplified pro-duction of rice.
riceslow-release nitrogen fertilizernitrogen accumulation and transferroot morphologyni-trogen fertilizer utilization
万方数据
维普
