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[1]ZHANG Yi,LI Jianping,JING Le.Effect of Grazing Enclosure on the Fractal Characteristics of Deep Soil of Grassland on the Loess Plateau[J].Research of Soil and Water Conservation,2018,25(05):131-135.

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Effect of Grazing Enclosure on the Fractal Characteristics of Deep Soil of Grassland on the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 05 Page number: 131-135 Column: Public date: 2018-09-06

Title:: Effect of Grazing Enclosure on the Fractal Characteristics of Deep Soil of Grassland on the Loess Plateau

Author(s):: ZHANG Yi¹, LI Jianping^1,2, JING Le¹; 1. School of Agriculture, Ningxia University, Yinchuan 750021, China;
2. Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration, Ningxia University, Yinchuan 750021, China

Keywords:: grazing enclosure; fractal dimension; deep soil; natural grassland; Loess Plateau

CLC:: S152.3

DOI:: -

Abstract:: In order to clarify the effect of long-term fencing on the fractal dimension of soil particle size in natural grassland, different period fenced grasslands in variety location stand for sequential vegetation restoration, the fractal characteristics of deep soil particle size overgrazing enclosure and grazing grassland in Yunwushan of Guyuan on the Loess Plateau were compared. The results were as follows. (1) The silt content of soil in 30-year grazing enclosure grassland was significantly lower than that of grazing grassland (p<0.05), which were 21.1% and 28.1%, respectively. (2) The fractal dimension of soil particle sizes of the grazing enclosure grassland was significantly higher than that of grazing grassland (p<0.01), especially in the soil layer of 140-500 cm. (3) The fractal dimension of soil particle sizes had a very significant positive correlation with the contents of extreme fine sand and silt (p<0.01), but negatively correlated with fine sand, middle sand and coarse sand (p<0.01). Therefore, the soil particle size tends to increase and the accumulation of soil fine and medium particles decreased in long-term grazing enclosure. Meanwhile, the long-term grazing enclosure of grassland affects the structure of deep soil, the physical structure information of deep soil should not be ignored.

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