Chinese Journal of Agrometeorology ›› 2012, Vol. 33 ›› Issue (02): 215-219.doi: 10.3969/j.issn.1000-6362.2012.02.010

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Effect of Nitrogen Fertilization Level on the Low Baseline of Crop Water Stress Index for Summer Maize in Red Soil

ZHAO  Fu-Nian, CHEN  Jia-Zhou, ZHANG  Hong   

  1. Key Laboratory of Subtropical Agricultural and Environment,Ministry of Agriculture,Huazhong Agricultural University,Wuhan430070,China
  • Received:2011-09-14 Online:2012-05-20 Published:2012-08-30
  • About author:ZHAO Fu-Nian, CHEN Jia-Zhou, ZHANG Hong

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Abstract: The low baseline of summer maize water stress index with different N level treatments (0,120 and 240kg·ha-1) in red soil in south China under sunny and cloudy conditions was established.The results showed that the regression testing effects were significant(P＜0.01).Nitrogen fertilization had reduced low baseline of maize.The low baseline decreased with nitrogen fertilization increased.The results indicated that CWSI could be used to detect water status in red soil,where the climate type is subtropical monsoon.So the low baseline of maize could be defined in sunny condition in this region.The results also suggested that the low baseline of CWSI should be defined at comparable soil fertilization levels in specific region.

Key words: Red soil, Nitrogen fertilization, Summer maize, Crop water stress index, Low baseline

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