耕地地力评价可持续研究发展方向探讨

On Sustainable Research of Culitivated Land Productivity Assessment

结合参与耕地地力评价的实际经验和众多研究成果,综合西南山地丘陵农业区的特点,分析了该项研究实际操作中的难度及原因,探讨了当前该项研究工作的不足,提出以下可持续研究发展方向:首先,可以在参评指标的选择和指标体系建设的过程中,以气候和地势为依据,将研究大区分为几个地力评价亚区,分亚区确定评价指标和权重。水田旱地交错分布区的地力评价工作,尤以西南地区为甚,基于水田旱地实际地块的地力水平及其权重的差异性,建议最好能够分开进行评价。再者,可以注重评价单元赋值的过程中插值方法的选择,可在对采集数据全局认识的基础上,再选择合适的点面赋值方法。此外,在地力评价工作过程中,注意每一细节的完成,因为这些细节的处理结果将直接影响到农业生产和结构化调整。

Based on research advances, practical experiences and the chacters of southwest China mountain agricultural region, this paper analyzed the difficulties and their causes in cultivated land productivity assessment, discussed the deficiencies in the current assessments, and put forward some further sustainable research issues. Firstly the whole study region should be divided into several sub-zones according to the disparities in climates and terrains, and then estbliahsed the corresponding assessment indexes and their weights. For the regions interlaced with paddy fields and drylands, especially for southwest China, paddy fields and drylands should be assessed separately due to the obvious differences in their productivities and factor weights. Furthermore, the choice should be stressed for the interpolating methods for each assessment unit, it could be done on the bases of generally correct understanding about the collected data. Besides, all links in the assessment process should be noticed, for they could immediately and remarkably influence the assessment results and agricultural production and pattern reconstruction.