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[1]ZHANG Liyu,DI Li,REN Yibin,et al.Difference in Soil Water in Zhonggou Small Watershed with Different Vegetation Measures in Loess Plateau of East Gansu[J].Research of Soil and Water Conservation,2021,28(04):159-164.

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Difference in Soil Water in Zhonggou Small Watershed with Different Vegetation Measures in Loess Plateau of East Gansu

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 04 Page number: 159-164 Column: Public date: 2021-08-10

Title:: Difference in Soil Water in Zhonggou Small Watershed with Different Vegetation Measures in Loess Plateau of East Gansu

Author(s):: ZHANG Liyu¹, DI Li¹, REN Yibin², HUANG Haixia³, NI Fan¹, WU Xianzhong⁴, WANG Anmin⁵, RU Haili⁵, LIU Junjun⁶; (1.College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China;2.College of Agriculture &Forestry, Longdong University, Qingyang, Gansu 745000, China;3.College of Forestry, Gansu Agricultural University, Lanzhou 730070, China;4.Lanzhou City University, Lanzhou 730070, China;5.Pingliang Water and Soil Conservation Science Institute, Pingliang, Gansu 744000, China;6.Jingchuan County Natural Resources Bureau, Jingchuan, Gansu 744300, China)

Keywords:: soil moisture; stand density; forestland; grassland; Loess Plateau of east Gansu

CLC:: S152.7

DOI:: -

Abstract:: Taking the forestland and grassland in the Zhonggou small watershed in the Loess Plateau of east Gansu and the Robinia pseudoacacia forest land with different stand densities as the research objects, the soil water content of the 0—120 cm soil layer was measured from April to October 2018 to analyze the change of soil moisture content with soil profile depth and time and the effect of forest density on soil moisture content. The results showed that:(1)the soil water content all decreased with the increase of the soil depth in forestland with different densities and the forest and grassland at different topography position, and the coefficient of variation of soil water content in the surface was greater than that in the deep layer, with the largest variation in the layer of 0—60 cm and the active layer of soil moisture became shallow;(2)the change trend of soil moisture content of Robinia pseudoacacia forests with different densities over time and soil depth was basically the same; the soil moisture decreased in the order: low-density stands>medium-density stands>high-density stands, the soil moisture difference in the layer 0—60 cm between the medium and low density level was very small, and the water content of stands at the two density grades in July and August was very close; it is recommended to choose planting density at 2 000～4 000 plants/hm² in this area;(3)the water content of the forest and grassland at different landforms varied with soil depth, it was higher in woodland than grassland at tableland surface; in ridge slope, it was higher in forestland than grassland within 0—40 cm soil layer, while the difference between the two below 40 cm was very small, soil moisture in grassland was slightly higher than the forest land, it was higher in woodland than grassland within 0—20 cm soil layer in gully platform, while it was higher in grassland woodland below 20 cm. Therefore, the tableland surface and ridge slope in the Loess Plateau of east Gansu are suitable for planting trees, and gully platform is suitable for planting grass.

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Last Update: 2021-08-20