黄土高原沟壑区不同种植年限果园土壤水分变化

Study on Change of Soil Water in Orchards of Different Planting-life in Gully Region of Loess Plateau

对黄土高原沟壑区不同种植年限果园土壤深层水分变化进行了研究。结果表明,受降水影响0-2m土层水分变化较大,且0-40 cm、40-80 cm、80-200 cm三个土层土壤含水量之间的差异达到极显著水平;2m以下由于没有水分的补给,土壤水分含量趋于稳定,出现了干燥现象。随着种植年限的增加,深层土壤的干燥化现象有增加趋势。

Change of soil moisture in deep layer was studied in different planting-life in gully region of loess plateau. The results showed that, affected by precipitation, the soil moisture had great change in 0-2 m soil layer, and there was a significant difference among 0-40 cm, 40-80 cm and 80-200 cm. Without water supply, soil moisture tended to be stable under 2 m soil layer which appeared desiccation. With the planting-life increasing, desiccation of deep soil layer tended to increase.