Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (30): 49-54.doi: 10.11924/j.issn.1000-6850.casb20191000747

Special Issue: 水稻

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Effect of Green Manure Chinese Milk Vetch on Nitrogen Balance in Paddy Soil System: A Review

Wang Ying1,2(), Luo Qi1, Lv Xinxin1, Tang Shan2, Zhou Nannan1()   

  1. 1Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, College of Environmental Science and Engineering, Anhui Normal University, Wuhu Anhui 241002
    2Anhui Provincial Key Laboratory of Nutrient Recycling, Resources and Environment, Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230001
  • Received:2019-10-22 Revised:2019-12-15 Online:2020-10-25 Published:2020-10-16
  • Contact: Zhou Nannan E-mail:gleaner@foxmail.com;nannanzh@ahnu.edu.cn

Abstract:

To systematically clarify the change of nitrogen circulation in paddy field after introducing Chinese milk vetch (Astragalus sinicus L.) as leguminous catch crop, this paper synthetically reviewed the effects of Chinese milk vetch on nitrogen (N) input and output in paddy soil and evaluated the N balance in rice-Chinese milk vetch cropping system. The conclusions mainly included: (1) Chinese milk vetch could effectively fix N and replace partial fertilizer, increase the N use efficiency; (2) by increasing rice yield and N content, Chinese milk vetch could raise N output through rice harvest; (3) Chinese milk vetch could effectively reduce N runoff loss; (4) Chinese milk vetch may have the potential to reduce nitrogen leaching loss, but the supporting data was limited; (5) Chinese milk vetch could significantly reduce NH3 volatilization in paddy fields, but the effect on N2O emission remained controversial at present. In summary, on the basis of maintaining rice yield, Chinese milk vetch could effectively reduce the environmental risk caused by N loss and ameliorate the N balance in paddy soil system.

Key words: Chinese milk vetch, chemical fertilizer reduction, nitrogen use efficiency, nitrogen balance, paddy rice

CLC Number: