Does land perform well for corn planting? An empirical study on land use efficiency in China
Does land perform well for corn planting? An empirical study on land use efficiency in China
复制标题
土地适合种植玉米吗？
DOI：
10.1016/j.landusepol.2017.10.032
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发表时间：
2018
期刊：
影响因子：
7.1
通讯作者：
Huang Wei
中科院分区：
文献类型：
--
作者：
Zhang Qian;Sun Zhongxiao;Huang Wei
为了评价种植业土地质量，采用随机前沿分析方法，将土地质量的异质性纳入到评价玉米种植业土地质量的指标体系中，建立了土地生产潜力效率指标体系。如果不考虑土地质量，玉米生产的技术效率（TE）就不能合理地进行区域间的比较，因为土地质量的差异很大。估计的平均TE为0.77，这表明如果所有农业生产单位都模仿表现最好的生产单位，在不增加投入的情况下，产量仍有可能增加23%。结果表明，平均LPI为0.273，最大值为1.0，这意味着TLPP的最小最佳使用与观察到的TLPP之间存在很大的差距。这一结果表明，玉米种植单位可以通过提高单位土地生产力，以较少的土地投入达到相同的产出。研究结果还表明，农户面积越大，经营单位的生产效率越高，这说明扩大农户面积，促进农户合作经营，是实现农业现代化，提高我国农业生产国际竞争力，使劳动力有效地脱离农业生产，向城市转移剩余劳动力。
To assess land quality for cropping, this study developed a land performance indicator (LPI), namely efficiency of total land productivity potential (TLPP), by incorporating the heterogeneity of land quality for individual agricultural production units when evaluating the performance of land for corn planting, using stochastic frontier analysis. Without taking into account land quality, the technical efficiency (TE) of corn production cannot be reasonably compared across regions because the variation in land quality is significant. The estimated mean TE was 0.77, which illustrates that there is still potential to increase output by 23%, without increasing inputs, if all agricultural production units emulate the best performing production units. The results demonstrated that the mean LPI was 0.273, with a maximum value of 1.0, implying that a large gap exists between the minimum optimum use of TLPP and observed TLPP. This finding indicates that corn planting units can achieve the same outputs with less land inputs through improving the land productivity per unit. The results also revealed that operational units with greater farm area are likely to be more efficient than with those with a smaller area, which suggests that enlarging farm area and promoting household cooperation and joint management practices are imperative to achieve agricultural modernization, enhance the competitiveness of China’s agricultural production in the global market, and effectively disengage labor from agricultural production and transfer the resulting surplus labor to cities.