[1]CHEN Guojing,CAI Jinjun,MA Fan,et al.Effects of Typical Forest and Grass Vegetation Structure on Soil Water-Stable Aggregates in Hilly Loess Plateau of Ningxia Province[J].Research of Soil and Water Conservation,2018,25(05):49-53,60.
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Effects of Typical Forest and Grass Vegetation Structure on Soil Water-Stable Aggregates in Hilly Loess Plateau of Ningxia Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 05
Page number:
49-53,60
Column:
Public date:
2018-09-06
- Title:
- Effects of Typical Forest and Grass Vegetation Structure on Soil Water-Stable Aggregates in Hilly Loess Plateau of Ningxia Province
- CLC:
- S714.2
- DOI:
- -
- Abstract:
- Soil aggregates are the basic unit structure of soils and are important indexes for studying soil structure and anti-erosion ability. In this paper, the water-stable aggregates under typical forest-grassland vegetation types in the loess hilly region of Ningxia were measured, and the differences of soil water-stable aggregates under different vegetation types were analyzed. The results showed that:(1) the ratio of water-stable macro-aggregates, MWD, GMD and D were higher in mixed forest than in pure forests such as Prunus sibirica, Prunus davidiana and Hippophae rhamnoides, which indicated that the structure of soil in mixed forest was the best, and the soil had the strongest anti-erosion ability; the index value of stability of soil water-stable aggregates in abandoned land was the lowest, the soil structure was the worst, and the erosion resistance was the lowest; (2) the content of > 0.25 mm water-stable aggregates was greater in woodland than abandoned wasteland, and the that of upper soil was larger than that of the lower soil, indicating that soil structure of forest land was more stable than that of wasteland and the structure of upper soil was more stable than deeper layer; (3) the value of soil fractal dimension D was higher in alfalfa than in woodland. The alfalfa soil had short recovery period, scattered soil particles and poor soil stability after being influenced by human activities. Based on the experimental results, it can be seen that soil-water-stable aggregates in forest lands, especially in mixed forests, are better than those in Alfalfa and wasteland, and have a good effect on soil structure recovery in the study area.
- References:
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1900-01-01