Spatial variation and its affecting factors of rice fertilizer use efficiency in Shangrao City of Jiangxi Province
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    Abstract:

    The data of 138 rice "3414" fertilizer tests conducted in Shangrao City of Jiangxi Province were studied and analyzed for spatial distribution of fertilizer use efficiency of the current rice crop and impacts of its affecting factors, such as soil type, fertilization rate , landform type and soil fertility, using ARCGIS and SPSS analysis software. Results show that in Shangrao City the nitrogen, phosphorus and potassium fertilizer utilization rate of the current rice crop averaged 36.86%, 18.86% and 43.89%, respectively, which varied to some extent from region to region, showing a decreasing order of Southwest > Southeast > Northwest > North > Central. The fertilizer nutrient utilization rate of the current rice crop varied in a certain pattern as affected by soil type (or soil species). It was the highest in the poorly developed Typic Hapli-Stagnic Anthrosols, and the lowest in the highly developed Typic Gleyi-Stagnic Anthrosols; the fertilizer use efficiency of the current rice crop was negatively related to fertilization rate, The higher the fertilization rate, the lower the fertilizer use efficiency; the effect of landform followed the order of plain > hilly land > mountain land; and the effect of soil fertility was also very important, displaying a decreasing order of low fertility > middle fertility > high fertility.

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Zhao Haidong, Zhao Xiaomin, Xie Linbo, Guo Xi. Spatial variation and its affecting factors of rice fertilizer use efficiency in Shangrao City of Jiangxi Province[J]. Acta Pedologica Sinica,2014,51(1):21-31.

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History
  • Received:December 03,2012
  • Revised:September 20,2013
  • Adopted:September 29,2013
  • Online: October 28,2013
  • Published: