Study on Effects of Soil Fertility under Different Ecological Restoration Measures in Red Soil Eroded Degradation Land

摘要

This paper chooses Hetian town as the study area, which is the serious red soil eroded degradation land (RSEDL) in Changting county. By means of field investigation and laboratory analysis, the paper studied the effects of soil fertility in RSEDL under different ecological restoration measures. The results show that: the soil fertilities were improved after adopting the six kinds of ecological restoration measures. Soil organic matter, total N, total P are improved obviously by comparing with a check test(CK). The best effects of improving organic matter and total N are the measures of the mixed plantation of tree, shrub and grass and ecological orchard. Plantation of grass and shrub in ditches can make better effect on improving soil total N; the measures of plantation of grass and shrub in ditches and fertilization have certain effects of improving soil total P. By statistical analysis, the order of the effects of improving soil fertility in the different ecological restoration measures is the mixed plantation of tree, shrub and grass >plantation of grass and shrub in ditches > ecological orchard >plantation grass on total slopes > forsook > fertilization.