水田稳定态肥料的氮素释放与水稻生育期氮素吸收的拟合度分析

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Fitting Analysis of Nitrogen Release from Stable Fertilizer for Paddy Field and Rice Nitrogen Absorption in Growth Period

Zhao Mingxuan，Wang Xin， Zhang Chang'ai， Shan Shengdao，Yu Wenhao （College of EnvironmentandResources，Zhejiang UniversityofScienceand Technology/Zhejiang Provincial KeyLaboratoryof Waste Biomass Recycling and Ecological Treatment Technology，Hangzhou 310023，China）

AbstractIn rice production，if the nutrient supply of fertilizers is consistent with the nutrient demand of crops，the nutrient absorption of crops would be promoted，and then thecrop yield and fertilizer utilization rate could be increased.In this study，the stable fertilizer for paddy field，compound fertilizer，controlled-release fertilizerand slow-release fertilizer were usedas test materials to measure the nitrogen release amount in hydrostatic water，the nitrogen release ratio at hydrostatic water stage，and the nitrogen absorption amount and ratio of poted rice at diffrent stages after fertilization，and then the fiting degreebetween nitrogen release ratio and nitrogen uptake ratio of riceat different stages was analyzed bygrey correlation analysis.The results showed that therelational degree of nitrogen release ratio at hydrostatic water stage of thefour fertilizers with the nitrogen uptake ratio at diferent growth stages of rice were O.85，O.70，0.78 and O.71，respectively，and the relational degree of stable fertilizer for paddy fieldincreased by 21.43% ， 8.97% and 19.72% compared with compound fertilizer，controlled-release fertilizerand slow-release fertilizer，respectively.Basedon therelational degree from large to small，thefour fertilizer could berankedasstable fertilizer for paddy field，controlled-release fertilizer，slow-release fertilizer and compound fertilizer，which was consistent with the order of rice yield in the pot experiment. The rice yield of stable fertilizer for paddy field increased by 60.93% ， 21.63% and （20 56.51% compared with compound fertilizer，controlld-release fertilizer and slow-released fertilizer，respectively.The results of this study indicatedthat the stable fertilizerfor paddy field was more suitable for rice production than the other three fertilizers in the pot experiment conditions.

KeyWordsStable fertilizer for paddy field; Nitrogen release in hydro static water; Nitrogen absorption; Rice ; Grey relational analysis

我国是水稻生产大国，同时水稻也是我国主要的粮食作物，种植面积占全国粮食作物种植面积的 25.8%[1] 。（剩余10087字）