Acta Geographica Sinica ›› 2018, Vol. 73 ›› Issue (3): 535-549.doi: 10.11821/dlxb201803011

• Land Use • Previous Articles     Next Articles

Estimation of sustainable grain productivity for arable land under water balance in the Huang-Huai-Hai Plain

LEI Ming1,2,KONG Xiangbin1,2(),WANG Jianing1,2   

  1. 1. College of Resources and Environment, China Agricultural University, Beijing 100193, China
    2. Key Laboratory for Farmland Quality and Monitoring of the Ministry of Land and Resources, Beijing 100193, China
  • Received:2017-06-27 Online:2018-03-20 Published:2018-03-23
  • Supported by:
    [Foundation: Key Project of National Social Science Foundation of China, No.14AZD031; Key Project of Natural Science Foundation of Beijing, No.8151001]

Abstract:

China puts forward the national strategy of fallow plan so as to improve the sustainable grain production capacity of arable land and alleviate the continuous decline of the groundwater level in the Huang-Huai-Hai Plain. Aiming at estimation of sustainable grain productivity for ensuring the implementation of this strategy, this paper learns management experience and experimental production from agricultural experiment station and adopts step-by-step correction method in twelve agricultural ecological zones, which are relatively uniform in social and economic conditions based on the sustainable theory and water balance. The results showed that: (1) The total sustainable grain production capacity of arable land under water balance in the Huang-Huai-Hai Plain was 116 million t/year. (2) The yield gap of sustainable grain productivity was -0.67 million t/year, the wheat yield gap was -3.31 million t/year due to limited-water irrigation and the maize yield gap was positive. (3) The loss area of wheat production is mainly distributed in Heilonggang area, Luxi Plain, the Beijing-Tianjin-Tangshan Plain and the eastern Henan Plain, and the potential area is mainly in Xuhuai Plain, the Northern Anhui Plain and Jiaoxi Yellow River Flood Plain. The research was valuable for understanding the sustainable productivity of cultivated land and implementing the reliable spatial pattern of agricultural production in the Huang-Huai-Hai Plain.

Key words: water balance, sustainable grain productivity, yield gap, Huang-Huai-Hai Plain