| Soil aggregate properties of grassland and forest during grazing in hilly and gully areas on the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2011.05.34 |
| Key Words: soil aggregate content damage rete of aggregate large aggregate of dry sieve wet sieving large aggregates grazing ground |
| Author Name | Affiliation | | XU Yongxia | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Agriculture Resources and Ecosystem Remediation of Loess Plateau, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | LIAO Chaoying | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Agriculture Resources and Ecosystem Remediation of Loess Plateau, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | SUN Changzhong | Experimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, China | | FA Lei | Experimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, China | | TANG Haibin | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Agriculture Resources and Ecosystem Remediation of Loess Plateau, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | BIAN Dandan | College of Forestry, Northwest A&F University,Yangling, Shaanxi 712100, China |
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| Abstract: |
| With the method of grazing field experiment, we studied the aggregate content and damage rate of the soil, so as to analyze surface soil aggregate (>0.25 mm) content and damage rate of different grazing intensity, different types of livestock and different types of vegetation. The results show that grazing intensity has certain effect on surface soil structrue and soil aggregate content is the least at heavy grazing intensity. Compared with goat selected as grazing livestock, sheep has less effect on destroying soil structure and has large quantity of soil aggregate. Compared with Caragana korshinkii kom, grazing grassplot has better soil structure. The results of damage rete of ag
gregate is consistent with that of soil aggregate content. So it is concluded that all categories of grazing intensity, types of livestock and types of vegetation affect the surface soil aggregate nature. |
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