Chinese Journal of Agrometeorology

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Effect of Different N/P Fertilizer Application on Rice Yield and N Use Efficiency in Irrigation Area of Ningxia

LI Qiao-zhen1,CHEN Xiao-qun2,LI Yu-zhong1,ZHANG Xue-jun2(1.Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences/Key Laboratory of Dryland Agriculture,MOA,Beijing 100081,China;2.Institute of Agricultural Resources and Environment,Ningxia Academy of Agricultural and Forestry Sciences,Yingchuan 750002)   

  • Online:2010-06-10 Published:2010-06-10

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Abstract: Based on field experimental data for irrigation rice in Lingwu,the effects of different N/P fertilizer application on rice yield and N use efficiency were studied.The results showed that the yields of 12 N/P treatments were 7.361t/ha~10.680t/ha,28%~85% higher than CK.The yield increased if adding appropriate fertilizer N based on low level of P,as same as adding appropriate fertilizer P based on low level of N.So treatments 6(N15P6),4(N15P9),5(N15P3),3(N10P9) got the best yield-composition,of which treatment 6 got best yield as 10.679t/ha.The treatment saved N by 25%,increased yield by 17.4% and efficiency of N by 20.7%.In conclusion,coupling of N15P6 was a best solution to apply and extend in irrigation area of Ningxia.

Key words: Rice, Rice, Yield components, N and P coupling, Total N uptake, N use efficiency