Effects of Different Fertilization Patterns on Rice Yield and Nutrient Use Efficiency
To solve the problem of increasing the production capacity of middle and low yield rice fields in the middle and lower reaches of the Yangtze River,6 treatments were set up for a field test in Dangyang,Hubei,including:local conventional fertilizer(T1),conventional compound fertilizer+3000 kg/hm2 bio-organic fertilizer(T2),organic-inorganic compound fertilizer(T3),biochar based fertilizer(T4),rice-specific formula fertilizer(T5)and non-fertilizer(CK).The effects of different fertilization modes on rice yield and nutrient utilization efficiency were studied under the same fertilization amount.The results showed that under different fertilization treatments,rice yield and yield components were T4＞T5＞T3＞T2＞T1＞CK.Compared with T,treatment,T2-T5 treatments increased yield by 4.27％-19.27％,respectively;under the same nitrogen application,the nitrogen accumulation of T2-T5 treatments increased by 4.08％-32.03％compared with T1 treatment,and T2-T5 treatments increased the nitrogen uptake,nitrogen contribution rate,nitrogen partial factor productivity,nitrogen agronomic efficiency and nitrogen apparent efficiency in the production of 100 kg seeds by 1.96％-9.15％,11.26％-44.86％,4.26％-19.27％,16.23％-72.79％and 7.80％-61.22％,respectively;under the same phosphorus application treatment,the phosphorus accumulation of T2-T5 treatments increased by 4.60％-26.67％compared with T1 treatment,and T2-T5 treatments increased phosphorus uptake,phosphorus partial productivity and phosphorus apparent utilization rate in the production of 100 kg seeds by 4.28％-19.27％,3.33％-10.00％and 12.48％-71.90％,respectively.Under the condition that the total amount of nitrogen,phosphorus and potassium fertilizer was the same,selecting appropriate slow-release fertilizer for basic application and rationally application of tillering fertilizer could not only improve the fertilizer absorption and utilization rate,but also increase the rice yield.
different fertilizer sourcesrice yieldfertilizer use efficiencynutrient absorptionbiochar based fertilizernitrogen fertilizer partial productivity
万方数据
维普
