title: [Soil C, P and microbial biomass C, P response to different fertilizations in the hillslope cropland of purple soil].
abstract: The aim of this study is to explore the changes and coupling characteristics of carbon (C), phosphorus (P) and microbial C, P in a hillslope cropland of purple soil. The results showed that total organic carbon (TOC) ranged from 90.8 to 100.8 g . kg-1 under organic fertilizer or straw combined with inorganic fertilizer treatments (including N, NP and NPK) as compared with nitrogen (N) application only (62.2 g . kg-1). Total phosphorus (TP) ranged from 0.65 to 0.84 g . kg-1 in organic combined with inorganic fertilization treatments, and that under straw combined with inorganic fertilizer treatments was 23%-38% of organic fertilizer combined with inorganic fertilization treatments. The microbial biomass phosphorus (MBP) under N fertilizer was significantly decreased as compared with combined fertilization treatments. The ratios of microbial biomass carbon (MBC) to MBP under combined fertilization treatments were between 5 to 26, and the TOC/TP ratios under organic fertilizer and straw combined treatments were between 92 to 137 and 296 to 653, respectively, while those under N fertilizer treatment were 59 and 2000, respectively. The results indicated that combined organic and inorganic fertilizers would be helpful for enhancing P availability and increasing its potential capacity in purple soil.
authors.forename: Yang
authors.initials: Y
authors.lastname: Gao
authors.forename: Ya-juan
authors.initials: YJ
authors.lastname: Xu
authors.forename: Yan
authors.initials: Y
authors.lastname: Peng
authors.forename: Jin
authors.initials: J
authors.lastname: Jin
authors.forename: Bo
authors.initials: B
authors.lastname: Zhu
authors.forename: Gui-rui
authors.initials: GR
authors.lastname: Yu
mesh_terms: D000383:Agriculture / Q000379:methods*; D018533:Biomass; D002244:Carbon / Q000737:chemistry; D005308:Fertilizers; D009584:Nitrogen / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology
chemical_list: D005308:Fertilizers; D012987:Soil; D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen