Acta Geographica Sinica ›› 2022, Vol. 77 ›› Issue (7): 1650-1661.doi: 10.11821/dlxb202207006

• Black Soil Conservation and Utilization • Previous Articles     Next Articles

Nitrogen fertilizer reduction potential in the main rice producing region of black soil in Northeast China

YIN Yinghua1(), PENG Xiaozong1, ZHAI Limei1(), ZHANG Yitao2, WANG Hongyuan1, LIU Hongbin1   

  1. 1. Key Laboratory of Nonpoint Source Pollution Control, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    2. Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China
  • Received:2021-10-18 Revised:2022-04-22 Online:2022-07-25 Published:2022-09-13
  • Contact: ZHAI Limei;
  • Supported by:
    National Key R&D Program of China(2018YFD0200200);National Natural Science Foundation of China(32072683)


The Northeast China Plain is an important commercial grain production base of the country, with rice being one of the region's principal food crops. Despite the exceptional quality and fertility of the region's black soil, excessive fertilizer application is nonetheless widespread. As a result, large-scale surveys and soil incubation experiments were conducted in Heilongjiang, Jilin and Liaoning provinces to clarify the spatial pattern, differential characteristics and the reduction potential of rice fertilization in the black soil area. The findings revealed that both netrogen (N) application intensity and economic yield dropped progressively from south to north in the region, with the decrease in N application intensity being greater than that in yield. As a result, N fertilizer partial productivity steadily increased from south to north. Compared to the theoretically suitable N application rate, the theoretical N reduction potential of rice area in Liaoning, central and western Jilin and Heilongjiang were determined to be 16.7%~24.7%, 8.7%~17.8%, and 2.0%~11.4%, respectively. In the three provinces, there is no significant difference in the quantity of accumulative soil mineralization of typical rice soils. Therefore, variances in N application to rice in Heilongjiang, Jilin, and Liaoning are mostly influenced by changes in the N quantity carried by aboveground biomass.

Key words: rice, Northeast China Plain, nitrogen, fertilizer reduction