| Response of plant community and soil texture of sandy grassland to the reseeding and plowing |
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| DOI：10.7606/j.issn.1000-7601.2018.04.35 |
| Key Words: plant communities soil texture reseeding tillage sandy grassland |
| Author Name | Affiliation | | WU Xu-dong | Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Science, Yinchuan, Ningxia 750002, China | | JIANG Qi | Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Science, Yinchuan, Ningxia 750002, China | | YU Hong-qian | Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Science, Yinchuan, Ningxia 750002, China | | WANG Zhan-jun | Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Science, Yinchuan, Ningxia 750002, China | | HE Jian-long | Institute of Desertification Control, Ningxia Academy of Agriculture and Forestry Science, Yinchuan, Ningxia 750002, China |
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| Abstract: |
| In order to study the responses of plant community and soil texture to tillage and reseeding measures in degraded sandy grassland, the soil particle composition, plant community structure and quantity characteristics of different Gramineae-Leguminous modes were analyzed by selecting three plowing modes (deep plowing, shallow plowing, and no-tillage) and using non-reseeding primary sandy grassland as a control (CK), the results showed that the species richness of deep plowing, shallow plowing, no tillage and CK were 9， 9，5 and 8 respectively in the grassland communities,Mechanical disturbance and reseeding measure reduced the breeding and expanding ability of the guerrilla-type clonal plants,and improved the dominance of the supplementary grass in the community, the dominance of perennial Gramineous and Leguminous plants under deep plowing was the most obvious. The species diversity and evenness of grassland plant communities increased significantly after the deep plowing and shallow plowing, in contrast, the ecological dominance were opposite. among them, the species diversity and evenness of the grassland communities under shallow plowing were the highest.and the guerrilla-type clonal plants increase the ecological dominance of primary grassland. The aboveground biomass of the reseeding grassland community ranged from deep plowing (348.39 g·m-2) > shallow plowing(285.77 g·m-2) > no tillage(242.08 g·m-2)> CK(141.83 g·m-2) to the primary grassland. There was significant difference in biomass compared with primary grasslands. The soil particle composition of the reseeding grassland was mainly dominated by fine sand of 50~250 μm, and the soil clay content and soil particle volume fractal dimension (P<0.01) in 0~20 cm soil layer was improved significantly by deep plowing, shallow plowing and sowing grass, as well as the soil texture and stability was improved significantly. |
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