STUDY ON THE INFLUENCE OF CONTINUOUS CONSTRUCTION AND WATER-SAVING TRANSFORMATION ON COMPREHENSIVE GRAIN PRODUCTION CAPACITY——BASED ON THE EMPIRICAL ANALYSIS OF 14 LARGE IRRIGATION DISTRICTS IN HUNAN PROVINCE
This paper probes into the influence and mechanism of continuous construction of supporting facilities and water-saving transformation on comprehensive grain production capacity,and points out the direction for the construction of agricultural water conservancy system and ensuring food security. Based on the panel data of 14 large irrigation districts in Hunan province from 1992 to 2020,the Time-varying DID model was used to analyze the effects of continuous construction and water-saving renovation on the comprehensive grain production capacity,and the Parallel Multiple Mediator Effect and Moderating Effect model was used to explore the mechanism of improving the comprehensive grain production capacity. The results were listed as follow. (1) The continuous construction of auxiliary facilities and water-saving transformation had a significant promoting effect on improving the comprehensive grain production capacity. (2) There was regional heterogeneity in the implementation of the reconstruction and water-saving reconstruction in Hunan province,and the effect around Dongting Lake,Changzhutan and Central Hunan was more significant. (3) The continuous construction of supporting facilities and water-saving transformation could improve the ability of meteorological disaster risk prevention and control,promote farmers to adopt water-saving irrigation technology,ensure stable grain yield and increase,and enhance the comprehensive grain production capacity. (4) Human capital played a regulating role in the application of water-saving irrigation technology to improve the comprehensive grain production capacity. Therefore,it should continue to promote the reconstruction of supporting facilities and water saving,focus on the construction of areas with poor conditions,and strive to build modern irrigation areas;promote water-saving irrigation technology,promote water rights trading,and increase rural human capital accumulation and improve the ability of resisting disasters in irrigated areas to ensure the improvement of comprehensive grain production capacity.
continue to build supporting facilities and water-saving transformationoverall grain production capacitywater conservancy facilitiestime-varying DIDParallel Multiple Mediator Effect
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