Li Yin, Zeng Shu-cai, Huang Wen-juan
College of Forestry, South China Agricultural University, Guangzhou 510642, China.
Ying Yong Sheng Tai Xue Bao. 2011 Mar;22(3):631-6.
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.
在鼎湖山进行了一项原位田间试验，以研究模拟氮沉降对马尾松林（PF）、针阔混交林（MF）和季风常绿阔叶林（MEBF）土壤酸性磷酸单酯酶活性（APA）和土壤有效磷（AP）含量的影响。在PF和MF中，设置了三个处理，即对照（0 kg N·hm⁻²·a⁻¹）、低氮（50 kg N·hm⁻²·a⁻¹）和中氮（100 kg N·hm⁻²·a⁻¹）；在MEBF中，设置了四个处理，即对照、低氮、中氮和高氮（150 kg N·hm⁻²·a⁻¹）。土壤APA和土壤AP含量随土壤深度降低。土壤APA在MEBF中最高，而AP含量在三种森林中无显著差异。施氮对土壤APA的影响因森林类型而异。在MEBF中，低氮处理下APA最高（19.52 μmol·g⁻¹·h⁻¹）；而在PF和MF中，中氮处理下APA最高（分别为12.74和11.02 μmol·g⁻¹·h⁻¹）。在三种森林中，低氮处理下土壤AP含量最高，但各氮处理间无显著差异。土壤APA与土壤AP含量之间存在显著正相关。
