陕南旬阳坝地区坡面土壤水分影响因子研究  

Study on Soil Moisture Contributing Factors of Xunyangba Area in Southern Shaanxi Province

作　　者：安彬[1,2] 

机构地区：[1]安康学院旅游与资源环境学院,陕西安康725000 [2]安康市汉江水资源保护与利用工程技术研究中心,陕西安康725000

出　　处：《山西农业科学》2017年第7期1128-1133,共6页Journal of Shanxi Agricultural Sciences

基　　金：陕西省教育厅自然科学专项研究计划项目(16JK1017)

摘　　要：土壤水分状况是反映生态系统恢复及合理进行农业措施的重要参考指标。基于野外秦岭中山区典型坡面不同用地类型(林地、撂荒地、园地和农耕地)的土壤水分数据,利用生态数量学冗余分析法(RDA),分析了坡面尺度上的土壤理化性质、地形等环境因子与土壤水分之间的关系。结果表明,园地、撂荒地、林地和农耕地土壤水分均值表现出一致性,且各层多表现出中等变异程度;4种用地类型的环境因子对土壤水分前2轴的累积解释量占特征值的总和均达到93%以上,坡度、坡位、有机质和容重对坡面土壤水分影响最为显著,林地和撂荒地受坡位的影响较大,而园地和农耕地受坡度因子的影响较大。因此,针对陕南秦岭段中山区坡面土壤水分的特征研究,可以将样点的坡度和坡位等作为分析的重要参考因子。Soil moisture status is an important reference index of reflecting ecosystem restoration and implementing agricultural measures reasonably. Based on soil moisture data of the typical slope in different land uses in medium mountain of Qinling（forest land,abandoned land, yard and farmland）, the relationship between soil moisture and environmental factors such as terrain, soil physical properties on slope scale are analyzed by using ecological quantity redundancy-Redundancy Analysis. The results showed that the average soil moisture of four land uses presented consistency, and the same time most layers were moderate degree of variation. Four land uses of environmental factors on soil moisture accumulation explanation for the previous two axis volume accounted for more than the sum of eigenvalues reached 93%. The most significant were slope, slope position, organic matter and bulk density on slope surface soil moisture. Affected forest and abandoned mainly was slope positions, while yard and farmland was slope. Therefore, factors such as slope and slope position, etc, are important reference when researched on soil moisture characteristics in medium mountain of Qinling.

关 键 词：秦岭中山区 表层土壤水分 坡面 影响因子 RDA 

分 类 号：S152.7[农业科学—土壤学]