Qin Hua-Jun, He Bing-Hui, Zhao Xuan-chi, Li Yuan, Mao Wen-tao, Zeng Qing-ping
Huan Jing Ke Xue. 2014 Sep;35(9):3580-6.
Soil microbial biomass and enzyme activity are important parameters to evaluate the quality of the soil environment. The goal of this study was to determine the influence of different slope position and section in Disporopsis pernyi forest land on the soil microbial biomass and enzyme activity in southwest Karst Mountain. In this study, we chose the Dip forest land at Yunfo village Chengdong town Liangping country Chongqing Province as the study object, to analyze the influence of three different slope positions [Up Slope(US), Middle Slope(MS), Below Slope(BS)] and two different sections-upper layer(0-15 cm) and bottom layer(15-30 cm) on the soil microbial biomass carbon (SMBC), soil microbial biomass nitrogen (SMBN), microbial carbon entropy (qMBC), microbial nitrogen entropy (qMBN) , catalase(CAT), alkaline phosphatase (ALK), urease(URE), and invertase(INV). The results showed that the same trend (BS > MS > US) was found for SMBC, SMBN, qMBC, qMBN, CAT and INV of upper soil layer, while a different trend (BS > US > MS) was observed for ALK. In addition, another trend (MS > US > BS) was observed for URE. The same trend (BS > MS >US) was observed for SMBN, qMBN, CAT, ALK, URE and INV in bottom layer, but a different trend (MS > BS > US) was observed for SMBC and qMBC. The SMBC, SMBN, CAT, ALK, URE and INV manifested as upper > bottom with reduction of the section, while qMBC and qMBN showed the opposite trend. Correlation analysis indicated that there were significant (P <0.05) or highly significant (P < 0.01) positive correlations among SMBC in different slope position and section, soil enzyme activity and moisture. According to the two equations of regression analysis, SMBC tended to increase with the increasing CAT and ALK, while decreased with the increasing pH. Then SMBN tended to increase with the increasing URE and INV.
土壤微生物生物量和酶活性是评估土壤环境质量的重要参数。本研究的目的是确定西南喀斯特山区八角莲林地不同坡位和剖面，对土壤微生物生物量和酶活性的影响。在本研究中，我们选取重庆市梁平区城东镇云佛村的八角莲林地作为研究对象，分析三个不同坡位[上坡（US）、中坡（MS）、下坡（BS）]和两个不同剖面——上层（0 - 15厘米）和底层（15 - 30厘米），对土壤微生物生物量碳（SMBC）、土壤微生物生物量氮（SMBN）、微生物碳熵（qMBC）、微生物氮熵（qMBN）、过氧化氢酶（CAT）、碱性磷酸酶（ALK）、脲酶（URE）和蔗糖酶（INV）的影响。结果表明，上层土壤的SMBC、SMBN、qMBC、qMBN、CAT和INV呈现相同趋势（BS > MS > US），而ALK呈现不同趋势（BS > US > MS）。此外，URE呈现另一种趋势（MS > US > BS）。底层土壤的SMBN、qMBN、CAT、ALK、URE和INV呈现相同趋势（BS > MS > US），但SMBC和qMBC呈现不同趋势（MS > BS > US）。随着剖面深度减小，SMBC、SMBN、CAT、ALK、URE和INV表现为上层 > 底层，而qMBC和qMBN呈现相反趋势。相关性分析表明，不同坡位和剖面的SMBC、土壤酶活性与土壤湿度之间存在显著（P < 0.05）或极显著（P < 0.01）的正相关关系。根据回归分析的两个方程，SMBC随CAT和ALK的增加而增加，随pH的增加而降低。而SMBN随URE和INV的增加而增加。
