辽宁棕壤耕地质量评价及障碍因素类型分区研究

ASSESSMENT OF CULTIVATED LAND QUALITY AND OBSTACLE FACTORS ZONING OF BROWN EARTH: A CASE STUDY OF LIAONING PROVINCE

关键词:  耕地质量 辽宁棕壤 障碍度模型 因素组合 分区

Key words:  cultivated land quality  brown earth of Liaoning province  obstacle degree model  factor combination  zoning

摘要:

［目的］以土壤类型为基础，选取土壤管理、理化性质、土壤养分、剖面性状、立地条件和气候条件等6个方面14个指标对辽宁棕壤耕地质量进行综合评价，在分析主要障碍因素基础上，根据障碍因素组合类型的不同对辽宁棕壤耕地进行质量障碍因素类型分区。［方法］采用模糊数学法和层次分析法，利用障碍度模型对辽宁棕壤耕地质量障碍因素进行诊断，分析棕壤耕地质量障碍因素类型分区。［结果］（1）辽宁棕壤耕地高等地、中等地和低等地，分别占棕壤耕地总面积的21.49%、59.18%和19.33%，耕地质量等级以中等地为主；（2）障碍因素组合类型共14种，根据障碍因素不同划分为3个耕地质量障碍因素类型区，即有机质障碍类型区、灌溉能力障碍类型区、质地障碍类型区，分别占棕壤耕地总面积的86.45%、10.75%和2.80%。［结论］（1）针对障碍因素类型分区，提出各区以障碍因素为主的耕地质量保护与提升措施，从而保证粮食生产；（2）文章从耕地土壤类型角度研究耕地质量障碍因素类型分区及其利用策略，为耕地质量保护与提升研究提供新视角，为耕地资源分区利用与管护研究提供参考依据。

Abstract:

This paper evaluated the quality of cultivated land in brown earth area of Liaoning province by selecting 14 evaluation indicators of 6 types, including soil management, physical and chemical properties, soil nutrient, soil profile character, site conditions and climate conditions.The methods of analytic hierarchy process and fuzzy mathematics were used. And then the obstacle model was used to diagnose the obstacle factors of cultivated land quality in Liaoning brown earth. The results showed that the proportions of high, middle and low level of cultivated land in the total cultivated land area were 21.49%, 59.18% and 19.33%, respectively; (2) the obstacle factor was divided into 3 dominant obstacle factor regions as organic matter obstacle type region, irrigation ability obstacle type region, and texture obstacle type region, accounting for 86.45%, 10.75% and 2.80% of the total area of brown earth, respectively. Finally, the paper put forward the measures to protect and improve cultivated land quality by promoting the main obstacle factors, in order to ensure grain production.This study provided a reference for the study of cultivated land quality protection and improvement.