JOURNAL OF NATURAL RESOURCES ›› 2019, Vol. 34 ›› Issue (12): 2687-2700.doi: 10.31497/zrzyxb.20191216

• Resource Ecology • Previous Articles     Next Articles

The impact of land fragmentation on farmer's chemical fertilizer use efficiency

SHI Chang-liang1(), ZHANG Yi2, GUO Yan3, ZHU Jun-feng3()   

  1. 1. Institute of Economics, Hunan Academy of Social Sciences, Changsha 410003, China
    2. Institute of Scientific and Technical Information CATAS, Haikou 571101, China
    3. College of Economics and Management, China Agricultural University, Beijing 100083, China
  • Received:2019-08-23 Revised:2019-10-22 Online:2019-12-28 Published:2019-12-28

Abstract:

In the background that China strongly advocated the chemical fertilizer use reduction and zero growth, how to improve chemical fertilizer use efficiency by farmers has become a crucial issue. This paper measures the chemical fertilizer use efficiency from the perspective of technical efficiency and analyzes the influence direction and degree of land fragmentation on the chemical fertilizer use efficiency through regression analysis and Shapley value framework based on R2. The results show that: (1) The technical inefficiency is high in the use of chemical fertilizers. In the case of other inputs such as unchanged labor and land, about 52.51% of fertilizer input can be reduced with no effect on the yield. Therefore, this could sufficiently achieve the aim of fertilizer reduction with no effect on the yield by improving the management level of farmer's fertilizer use. (2) The land fragmentation has a significant negative impact on chemical fertilizer use efficiency. All other factors being equal, each block of land increase could lead to a fertilizer use efficiency decrease of 0.002. This conclusion is robust to different variable definitions, estimating methods and winsorized sample. In addition, the Shapley value decomposition result shows that land fragmentation is also an important reason for low chemical fertilizer use efficiency of Chinese farmers. On the whole, land fragmentation can conduct 12.15% of farmer's chemical fertilization efficiency variance which is fourth in all the factors only next to village dummy variables, paddy field ratio and food crop planting ratio. Moreover, the contribution of the land fragmentation to chemical fertilizer use efficiency difference is stronger in the western region where the fragmentation is relatively high. (3) The difference in the chemical fertilization efficiency mainly depends on local village characte-ristics and the characteristics of production and management including the management scale, plantation structure, land quality, and whether or not to join the cooperative. However, the explanation of farmer's individual characteristics influenced by collective decision to chemical fertilizer use efficiency is relatively weak.

Key words: land fragmentation, chemical fertilizer use, technical efficiency, Shapely value decomposition