The impact of land use on water loss and soil desiccation in the soil profile

Zhang, Jing; Wang, Li

The impact of land use on water loss and soil desiccation in the soil profile | L’ impact de l’occupation des sols sur la perte en eau et la dessiccation du sol dans le profil pédologique El impacto del uso de la tierra sobre la pérdida de agua y la desecación del suelo en el perfil del suelo 土地利用对土壤剖面水量损失和土壤干化的影响 O impacto do uso da terra na perda de água e a dessecação do solo no perfil de solo

2018

Zhang, Jing | Wang, Li

Farmlands have gradually been replaced by apple orchards in Shaanxi province, China, and there will be a risk of severe soil-water-storage deficit with the increasing age of the apple trees. To provide a theoretical basis for the sustainable development of agriculture and forestry in the Loess Plateau, soil water content in a 19-year-old apple orchard, a 9-year-old apple orchard, a cornfield and a wheat field in the Changwu Tableland was investigated at different depths from January to October 2014. The results showed that: (1) the soil moisture content is different across the soil profile—for the four plots, the soil moisture of the cornfield is the highest, followed by the 9-year-old apple orchard and the wheat field, and the 19-year-old apple orchard has the lowest soil moisture. (2) There are varying degrees of soil desiccation in the four plots: the most serious degree of desiccation is in the 19-year-old apple orchard, followed by the wheat field and the cornfield, with the least severe desiccation occurring in the 9-year-old apple orchard. Farmland should replace apple orchards for an indefinite period while there is an extremely desiccated soil layer in the apple orchard so as to achieve the purpose of sustainable development. It will be necessary to reduce tree densities, and to carry out other research, if development of the economy and ecology of Changwu is to be sustainable.

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