【摘要】 将中子水分仪与烘干法相结合,对陕西淳化县泥河沟流域典型农果复合边界(冬小麦苹果)和针阔叶林复合边界(油松—刺槐)土壤水分进行测定,分析土壤水分在不同水平位点及垂直方向上的变化规律,并用移动窗口法确定了两种植被复合边界上的土壤水分影响域。结果表明:农地土壤含水率要高于果园土壤含水率,刺槐林地土壤含水率普遍高于油松林地土壤含水率;复合边界上的土壤水分影响域主要受植被根系分布的影响,且随着土层深度的不同而异;苹果与冬小麦复合边界上的影响域在0~60 cm土层内麦地为8 m,果园为6 m,80~120 cm土层内麦地为8 m,果园为2 m,140~200 cm土层内麦地为4 m,果园为4 m;油松与刺槐复合边界上的影响域在0~80 cm土层内油松为6 m,刺槐为8 m,100~160 cm土层内油松为4 m,刺槐为6 m。更多还原

【Abstract】 Based on the field measurement of soil water by Neutron probe and oven dry method,the dynamics distribution of soil water in horizontal and vertical directions at edge belts were analyzed for two typical vegetation compound boundary:crop plant-fruit tree boundary(Triticum aestivum Linn.-Malus pumila Mill.) and coniferous forest-broadleaf forest boundary(Pinus tabulaeformis Carr.-Robinia pseudoacacia Linn.),and the distance of edge influence were also studied by using moving split-window techniques.The results showed that the soil water content of Triticum aestivum Linn.is higher than Malus pumila Mill.’s,and the soil water content of Robinia pseudoacacia Linn.is higher than Pinus tabulaeformis’s.The distance of edge influence of compound boundary to soil water content was mainly affected by root distribution of plant at edge belts,which was variety with the depth in the soil layer.The distance of edge influence to soil water content at soil depth of 0-60 cm,80-120 cm and 140-200 cm were 8 m & 6 m,8 m & 2 m and 4 m & 4 m for Triticum aestivum Linn.-Malus pumila Mill.compound boundary,respectively,and that of 0-80 cm,100-160 cm were 6 m & 8 m,4 m & 6 m for Pinus tabulaeformis Carr.-Robinia pseudoacacia Linn.compound boundary,respectively.更多还原