title: [Effects of simulated nitrogen deposition on soil acid phosphomonoesterase activity and soil available phosphorus content in subtropical forests in Dinghushan Mountain].
abstract: An in situ field experiment was conducted to study the effects of simulated nitrogen (N) deposition on soil acid phosphomonoesterase activity (APA) and soil available phosphorous (AP) content in Pinus massoniana forest (PF), coniferous and broad-leaved mixed forest (MF), and monsoon evergreen broad-leaved forest (MEBF) in Dinghushan Mountain. In PF and MF, three treatments were installed, i.e., CK (0 kg N x hm(-2) x a(-1)), low N (50 kg N x hm(-2) x a(-1)), and medium N (100 kg N x hm(-2) x a(-1)); in MEBF, four treatments were installed, i.e., CK, low N, medium N, and high N (150 kg N x hm(-2) x a(-1)). The soil APA and soil AP content decreased with soil depth. The soil APA was the highest in MEBF, while the AP content had no significant difference in the three forests. The effects of N addition on soil APA differed with forest types. In MEBF, the APA was the highest (19.52 micromol x g(-1) x h(-1)) in low N treatment; while in PF and MF, the APA was the highest (12.74 and 11.02 micromol x g(-1) x h(-1), respectively) in medium N treatment. In the three forests, soil AP content was the highest in low N treatment, but had no significant differences among the N treatments. There was a significant positive correlation between soil APA and soil AP content.
authors.affiliation: College of Forestry, South China Agricultural University, Guangzhou 510642, China. liyin@scbg.ac.cn
authors.forename: Yin
authors.initials: Y
authors.lastname: Li
authors.forename: Shu-cai
authors.initials: SC
authors.lastname: Zeng
authors.forename: Wen-juan
authors.initials: WJ
authors.lastname: Huang
mesh_terms: D002681:China; D003198:Computer Simulation; D009584:Nitrogen / Q000032:analysis*; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism*; D010758:Phosphorus / Q000032:analysis*; D028223:Pinus / Q000254:growth & development; D011891:Rain / Q000737:chemistry; D012987:Soil / Q000032:analysis*; D064028:Tracheophyta / Q000254:growth & development; D014197:Trees / Q000254:growth & development*; D014329:Tropical Climate
chemical_list: D012987:Soil; D010758:Phosphorus; D010744:Phosphoric Monoester Hydrolases; D009584:Nitrogen