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[1]CAI Chuxiong,JIA Yuhua,GUO Chengjiu.Research for Effect of Different Types of Vegetation on Physical Properties Improvement of Sandy Soil in the Sandy Land in South Horqin[J].Research of Soil and Water Conservation,2017,24(02):49-54.

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Research for Effect of Different Types of Vegetation on Physical Properties Improvement of Sandy Soil in the Sandy Land in South Horqin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 02 Page number: 49-54 Column: Public date: 2017-04-28

Title:: Research for Effect of Different Types of Vegetation on Physical Properties Improvement of Sandy Soil in the Sandy Land in South Horqin

Author(s):: CAI Chuxiong, JIA Yuhua, GUO Chengjiu; College of Water Conservancy, Shenyang Agricultrural University, Shenyang 110866, China

Keywords:: Horqin Sandy Land; vegetations; Pinus sylvestris; Caragana intermedia; green bristlegrass; bare sandy land; improvement

CLC:: S152

DOI:: -

Abstract:: The experiment selected four typical sites of sandy lands with Pinus sylvestris forest, Caragana intermedia forest, green bristlegrass and bare sandy land (control) in the south edge of Horqin as the research samples. Through the study of physical index determination of soil bulk density, soil moisture content, maximum water holding capacity, capillary water holding capacity, field moisture capacity and particle size analysis, the effect of different vegetation on soil physical properties were examined. The results show that three kinds of vegetation could completely improve the soil physical properties to some extent. (1) Caragana intermedia and Pinus sylvestris have poor water conservation capacity and soil moisture contents in 1 m depth was only 2.1% and 2.6%, respectively, which are lower than that of the bare sandy land. However the soil moisture content in the depth of 1 m of green bristlegrass reached to 7.4%, which is about 1.6 times more than that in the depth of 1 m in the bare sandy land. (2) By analyzing the average value of each physical index in 0—30 cm layer, we may draw the conclusion that the sandy sites with three kinds of vegetation have the lower soil bulk density than bare sandy land. The capillary water holding capacity and field moisture capacity of green bristlegrass are the highest, which are 21.7% and 18.2%, respectively. The next is Caragana intermedia forest and Pinus sylvestris forest and the smallest is bare sandy land. The maximum water holding capacity of Caragana intermedia forest is the highest one, which is 24.6%. The next is green bristlegrass and Pinus sylvestris, and the bare sandy land is the smallest one. (3) Through the analysis of the physical indexes of different soil depths, we may come to conclusion that at the depth of 0—10 cm and the depth of 10—20 cm, three kinds of vegetation have the significant impact on soil bulk density, maximum water holding capacity and field moisture capacity, but does not have the significant impact on the capillary water holding capacity. Three kinds of vegetation have the significant impact on each physical index at the depth of 20—30 cm. (4) The improvement effect caused by the three kinds of vegetation on the heterogeneity of soil distribution followed the order:green bristlegrass > Pinus sylvestris > Caragana intermedia, which indirectly indicated that the uniformity coefficient of particle size distribution in the sandy soil under different vegetation forms followed the order:green bristlegrass > Pinus sylvestris > Caragana intermedia. Compared with the bare sandy land, the soil physical indexes of various vegetation types are better than the bare sandy. The results show that vegetation can significantly improve the local soil physical properties.

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