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退耕还林工程对粮食生产的影响——以山西省为例
郑雪1,2, 姚顺波1,2, 鲁亚楠1,2
1.西北农林科技大学 经济管理学院, 陕西 杨凌 712100;2.西北农林科技大学 资源经济与环境管理中心, 陕西 杨凌 712100
摘要:
[目的] 研究退耕还林工程对粮食生产的影响,为深入开展退耕还林工程提供科学依据。[方法] 以山西省的117个县域为研究单位,基于1990,2000,2005,2010和2015年5期土地利用数据和社会经济统计数据,分析耕地和粮食生产时空变化,并通过建立生产函数分析退耕还林工程对粮食生产的影响。[结果] ①山西省生态环境重点治理区域的退耕效果显著,黄土丘陵沟壑区耕地转林草地的类型尤为明显;②退耕15 a期间,山西省粮食总产量及粮食单位面积产量总体呈上升趋势,其中重点退耕县的粮食总产量与粮食单产水平都一定程度的提高,且粮食单产增幅高于全省平均水平;③退耕对粮食总产量及粮食单位面积产出均有显著的正向影响。[结论] 在省级层面,退耕还林工程不会对粮食生产造成负面影响,反而通过促进农业集约化生产等方式,提高粮食单产水平,进而带动粮食产量的提高。
关键词:  退耕还林  时空变化  粮食生产  生产函数
DOI:10.13961/j.cnki.stbctb.2020.02.035
分类号:S721;F326.11
基金项目:林业公益性行业科研专项"退耕还林工程效益监测、评估与优化技术"(201504424);教育部人文社会科学重点研究基地基金项目"西部生态修复工程财政支出效率与提升路径"(14JJD790031);国家自然科学基金项目"黄土高原区退耕还林政策生态效率评价与提升路径"(71473195)
Impacts of Sloping Land Conversion Program on Grain Production—A Case Study in Shanxi Province
Zheng Xue1,2, Yao Shunbo1,2, Lu Yanan1,2
1.College of Economics & Management, Northwest A&F University, Yangling, Shaanxi 712100, China;2.Research Center for Resource Economics and Environment Management, Northwest A&F University, Yangling, Shaanxi 712100, China
Abstract:
[Objective] The impacts of sloping land conversion program (SLCP) on grain production were studied, in order to provide a scientific basis for the further development of SLCP.[Methods] This paper investigated the temporal and spatial changes of cultivated land and grain production by taking 117 counties in Shanxi Province as research units, based on the land use data and socio-economic statistics in 1990, 2000, 2005, 2010 and 2015. And the production function was used to analyze the impact of SLCP on grain production.[Results] ① The effect of SLCP to the key ecological environment control areas in Shanxi Province was remarkable. The spatial distribution of cultivated land converted to forest land and grassland was more obvious in the hilly and gully region of the Loess Plateau. ② Over the past 15 years, the total grain output and the grain yield per unit area in Shanxi Province showed an overall upward trend. The total grain output and the grain yield per unit area in key conversion counties were increased to a certain extent, and the increasing rate of grain yield per unit area was higher than the average level of the whole province. ③ SLCP showed a significant positive impact on the total grain output and the grain yield per unit area.[Conclusion] At the provincial level, SLCP will not have a negative impact on grain production. Instead, it will promote the intensive production of agriculture and other ways to improve the level of grain per unit area, and then promote the increase of grain production.
Key words:  sloping land conversion program  temporal and spatial changes  grain production  production function