| Effects of planting years of alfalfa on soil quality |
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| DOI：10.7606/j.issn.1000-7601.2014.02.012 |
| Key Words: planting years moisture content soil nutrients soil microorganisms |
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| Abstract: |
| In order to reveal the changes in soil quality of different planting years of alfalfa, we analyzed soil moisture, nutrients and microbial population of alfalfa field with one to five planting years. The results showed that as the planting year increased, temporal and spatial variation of soil moisture content exhibited a pattern of increasing first and then decreasing. in addition, soil organic matter, total nitrogen content showed an increasing trend, potassium content increased first and then decreased. In the alfalfa planting soil, microbial community was dominated by bacteria, and the number of bacteria and actinomycetes as planting year increased. However, no obvious trend was found for fungus. In addition, 4-year-old alfalfa total number of microorganisms is the highest among all the treatments. Our findings indicate a substantial influence of planting year on soil quality of alfalfa field. |
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