Rapid development of the hickory (Carya cathayensis Sarg.) industry and excessive use of herbicides as well as other intensive management practices have resulted in serious damage to soil properties and forest vegetation. A decline in soil nutrients and a reduction in soil microbial biodiversity are often observed. To evaluate the potential of sod鄄culture to improve soil fertility and microbial activities of C. cathayensis forest soil, a 2鄄year field trial was initiated in 2010. In this study, six treatments (white clover, rye grass, oil rape seed, milk vetch, natural weeds and clean tillage (as CK)) each with three replicates were assessed in a randomized design. The effects of sod鄄culture treatments on soil nutrients and soil microbial biomass carbon in the C. cathayensis forest soil were measured. Changes in soil microbial diversity were also evaluated using Biolog. The results showed that there are various degrees of change in soil organic matter, available N, available K, available P, total N, total K and total P in C. cathayensis forest soil due to the different sod鄄culture treatments. Data indicated that except for soil total K, sod鄄culture treatments enhanced soil nutrient content significantly in the C. cathayensis forest soil as compared with the CK treatment. White clover and milk vetch treatments increased soil nutrient
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