摘要
省级耕地地力评价对快速准确掌握大区域耕地地力水平,有效的进行农业区划并指导农业生产有着重要的作用。本研究在收集分析山西省2005～2014年县域耕地地力评价数据、测土配方施肥采样点数据以及土地利用现状等数据的基础上,运用多尺度指标分区方法将山西省划分为5个区域。基于决策树方法构建了隶属各区的不同评价指标体系并对耕地地力进行了评价与分级,将山西省耕地划分为1～10等地。其中,1至3等地的耕地占总面积的11.56%,该部分耕地地力较高,为山西省的优质耕地;4至6等的耕地占耕地总面积的61.22%,可以通过进行一系列耕地保护措施有效提高耕地质量以提升粮食产量;7至10等的耕地占耕地总面积的27.22%,该部分耕地生产障碍因素突出,应通过加强生态保护继续开展农田建设以提高耕地地力水平。评价结果可为省级耕地资源管理及辅助决策提供依据。
Evaluation on provincial cultivated land fertility helps to understand accurately the level of cultivated land fertility in large areas and plays an important role in agricultural regional planning and agricultural production guiding.In this study, the whole Shanxi Province was divided into 5 areas by using the division method based on multi-scale indicators by collecting and analyzing large amounts of information, which included evaluation data of cultivated land fertility at county level, sampling point data of formula fertilization by soil testing and land use data of the study area from in 2005 to in 2014. Furthermore, different evaluation systems in various areas were built with the application of decision tree classification. Based on the evaluated and classified results, the cultivated land of Shanxi Province was divided into 10 grades. The 1st to 3rd grades of cultivated land with high fertility accounted for 11.56% of the total area of cultivated land. The 4th to 6th grades reached 61.22% and the quality of cultivated land in this class can be improved by a series of effective protection measures. 27.22% of cultivated land belonged to 7-10 grades that needed to be improved by executing land construction through ecological protection because it had serious obstacles in high production from the land. The outcomes of this study could provide data support for resource management of provincial cultivated land and decision-making for land utilization.
出处
《土壤通报》
CAS
CSCD
北大核心
2016年第3期580-587,共8页
Chinese Journal of Soil Science
基金
山西省科技攻关项目(20120311009-1)
山西省农业厅"山西省耕地地力评价"项目(2014)资助
关键词
分区
决策树
耕地地力评价
山西省
Division areas
Decision tree
Cultivated land fertility evaluation
Shanxi Province
