Chinese Geographical Science ›› 2021, Vol. 31 ›› Issue (3): 571-584.doi: 10.1007/s11769-021-1200-1

• Articles • Previous Articles    

Agricultural Non-point Source Pollution in China: Evaluation, Convergence Characteristics and Spatial Effects

QIU Wenwen1,2, ZHONG Zhangbao2, LI Zhaoliang3   

  1. 1. School of Literature, Law and Economics, Wuhan University of Science and Technology, Wuhan 430081, China;
    2. Research Center for Rural Social Construction and Management, Huazhong Agricultural University, Wuhan 430070, China;
    3. College of Law and Business, Wuhan Institute of Technology, Wuhan 430205, China
  • Received:2020-03-24 Published:2021-04-29
  • Contact: ZHONG Zhangbao E-mail:zzbemail@mail.hzau.edu.cn
  • Supported by:
    Under the auspices of Key Program of the National Social Science Fund of China (No. 16ASH007)

Abstract: In this study, an inventory analysis approach was used to investigate the intensity of agricultural non-point source pollution (ANSP) and its spatial convergence at national and provincial levels in China from 1999 to 2017. On this basis, spatial factors affecting ANSP were explored by constructing a spatial econometric model. The results indicate that: 1) The intensity of China’s ANSP emission showed an overall upward trend and an obvious spatial difference, with the values being high in the eastern and central regions and relatively low in the western region. 2) Significant spatial agglomeration was shown in China’s ANSP intensity, and the agglomeration effect was increasing gradually. 3) In the convergence analysis, a spatial lag model was found applicable for interpretation of the ANSP intensity, with the convergence rate being accelerated after considering the spatial factors but slower than that of regional economic growth. 4) The spatial factors affecting the ANSP intensity are shown to be reduced by improving agricultural infrastructure investment, labor-force quality, and crop production ratio, while the expansion of agricultural economy scale and precipitation and runoff have positive impact on ANSP in the study region. However, agricultural research and development (R&D) investment showed no direct significant effect on the ANSP intensity. Meanwhile, improving the quality of the labor force would significantly reduce the ANSP intensity in the surrounding areas, while the precipitation and runoff would significantly increase the pollution of neighboring regions. This research has laid a theoretical basis for formulation and optimization of ANSP prevention strategies in China and related regions.

Key words: intensity of agricultural non-point source pollution, spatial effects, inventory analysis, spatial econometric model, β convergence