黄土丘陵沟壑区密植枣林株行间土壤水分状况

为了揭示陕北山地密植红枣林土壤水分空间分布状况,对枣林株行间不同位置(株间、行间、中心点)0～200 cm土层的土壤水进行了连续观测.结果表明:在7～9月,枣林地株间土壤水分状况明显好于行间.株间、行间、中心点土壤含水量均值分别为9.77％、7.66％、7.52％.不同降雨量下枣林地株行间不同位置土壤水分的累计入渗量不同,株间入渗量大于行间,且随着降雨量的增大,各位置入渗量也随之增大,株间的入渗补给作用在增强,但行间的入渗补给作用在减弱.中雨(p=14.8 mm),株间、行间、中心点累计入渗量分别为13.5、8.8、8.4 mm;大雨(p=31.6 mm),株间、行间、中心点累计入渗量分别为30.9、16.5、12、8 mm.雨后枣林地株行间不同位置土壤水分日均消耗量以株间最大,达4.09 mm/d,行间次之,为3.77 mm/d,中心点最小,为2.27 mm/d.

Soil moisture among plants and in rows of the close planting Jujube forest in the loess hilly and gully region

In order to reveal the characteristics of spatial distribution of soil moisture in the close planting Jujube forest in Northern Shaanxi Province, continuous monitoring of soil moisture in 0~200 cm soil layer was carried out in different positions(inter-trce, inter-row and center-point) of the Jujube forest. The results indicated that soil moisture of inter-tree was significantly better than inter-row in July~September. The average soil water of inter-tree, inter-row and center-point was 9.77%, 7.66% and 7.52%. With the changing of rainfall, cumulative infiltration was different in various positions of the Jujube forest. The infiltration capacity of inter-tree was larger than that of inter-row. With the in-crease of rainfall, the infiltration capacity increased in all positions and the infiltration was recharged. The function in in-ter-tree increased, but that in inter-row decreased. For example, in the moderate rain(p=14.8 mm), the infiltration capacity of inter-tree, inter-row and center-point was 15.5 mm, 8.8mm and 8.4 mm; while in the heavy rain(p=31.6 mm), that was 30.9mm, 16.5mm and 12.8 mm, respectively. The average daily consumption of soil water in inter-tree was the highest(4.09 mm/d), followed by that in inter-row(3.77 mm/d), and that in center-point was the lowest(2.77 mm/d) in all positions.