Soil nutrient and microbial biomass in the Loess hilly area of Ningxia under different plant rehabilitation patterns
宁夏黄土丘陵区植被恢复对土壤养分和微生物生物量的影响

Nutrient and microbial biomass carbon (Cmic), nitrogen (Nmic), phosphorus (Pmic) in soils of Guyuan Loess hills of Ningxia Province under natural grassland, cropland, abandoned cropland and varying ages of rehabilitated Caragana korshinskii shrub lands were determined. Base on the results, soil nutrients contents increase with increasing age of rehabilitation, and are generally low in cropland and newly abandoned cropland, with the exception of available P and total nitrogen. Soil microbial biomass is signi...