湖南农业科学Issue(5)：33-37,5.DOI:10.16498/j.cnki.hnnykx.2025.005.007
镉低积累品种中安早7号肥料利用率研究
Fertilizer Utilization Efficiency of'Zhong'anzao No.7'with Low Cadmium Accumulation
摘要
Abstract
Field plot experiments were conducted to measure the rice yield and the accumulation of nitrogen(N),phosphorus(P),and potassium(K)in rice grains,stems,and leaves,on the basis of which the N,P,and K fertilizer utilization efficiency of'Zhong'anzao No.7'with low cadmium accumulation was studied.The results showed that the combined fertilization of NPK improved the economic traits and significantly increased the yield of'Zhong'anzao No.7',with the contribution rate of 30.4%to the yield.The contribution rate of single fertilizers to the rice yield was in a trend of N>P>K.The NPK treatment increased the accumulation of N,P,and K by 75.94%,24.64%,and 14.47%compared with the N0PK,NP0K,and NPK0 treatments,respectively.The K accumulation under the N0PK treatment was 8.42%lower than that under the NPK0 treatment.The nutrient coefficients of N,P2O5,and K2O under the NPK treatment were 2.12,0.92,and 3.62,respectively.'Zhong'anzao No.7'had a nutrient coefficient for K2O 9.7%higher than the rice varieties of non-low cadmium accumulation.The N,P,and K utilization efficiency under the NPK treatment was 47.35%,23.57%,and 47.51%,respectively.The K utilization efficiency was-27.38%under the N0PK treatment.The lack of N,P,K elements exacerbated the decrease in soil nutrient content.The results illustrated that applying NPK fertilizers can significantly improve the fertilizer utilization rate and maintain soil fertility.'Zhong'anzao No.7'has a greater demand for K than the rice varieties of non-low cadmium accumulation,and thus attention should be paid to the application of K fertilizer in the cultivation of this variety.关键词
镉低积累/早稻品种/氮磷钾/肥料利用率/宁乡市Key words
low cadmium accumulation/early rice variety/NPK/utilization efficiency of fertilizer/Ningxiang City分类
农业科技引用本文复制引用
程爱武..镉低积累品种中安早7号肥料利用率研究[J].湖南农业科学,2025,(5):33-37,5.基金项目
湖南省科学施肥增效(湘农办发[2024]59号) （湘农办发[2024]59号）
