Resources Science ›› 2019, Vol. 41 ›› Issue (8): 1387-1439.doi: 10.18402/resci.2019.08.01

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Impacts of drought disasters and farmland irrigation on wheat production technical efficiency

Jian LUAN,Yijun HAN()   

  1. College of Economics and Management, China Agricultural University, Beijing 100083, China
  • Received:2019-03-12 Revised:2019-05-28 Online:2019-08-28 Published:2019-08-21
  • Contact: Yijun HAN E-mail:hyjcau@126.com

Abstract:

Drought disasters cause great reduction of wheat yield. It is of vital importance to clarify the impact of drought disasters on wheat production technical efficiency under different levels of farmland irrigation. Based on panel data of 15 major wheat producing provinces of China from 1991 to 2016, stochastic frontier analysis and panel threshold regression model were used in this study to explore the temporal and spatial change of wheat production technical efficiency and the threshold effect of drought disasters on wheat production technical efficiency, as well as temporal and spatial heterogeneity of drought disaster mitigation capacities of farmland irrigation infrastructure. The results are as follows: (1) There is an overall increasing trend with an average annual growth rate of 0.98% of wheat production technical efficiency, which also shows obvious temporal variation convergence and spatial heterogeneity in different regions. Eastern China has the highest level of wheat production technical efficiency, leading the movement of production frontiers. There is a large potential for the central and western regions to improve wheat production technical efficiency. (2) As effective irrigation rate increases, drought disasters show a double threshold effect on wheat production technical efficiency. The negative impact of droughts decreases with the increase of effective irrigation rate. (3) Disaster mitigation capacities of farmland irrigation infrastructure have been significantly improved from 1991 to 2016, while there are still some provinces, such as Gansu, Shaanxi, Sichuan, and Yunnan, whose disaster mitigation capacities are relatively weak. Therefore, the key to alleviating constrains of drought disasters and improving the quality and efficiency of wheat production is to strengthen farmland irrigation investments according to local circumstances to increase effective irrigation rate.

Key words: drought disasters, farmland irrigation, wheat production, technical efficiency, stochastic frontier function, panel threshold regression model