Vegetation rehabilitation increases soil enzyme activities in degraded land via carbon supply and nitrogen retention
文献类型： 外文期刊
作者： Yan, Bangguo 1 ; Wang, Xuemei 2 ; Sun, Yi 1 ; Fan, Bo 3 ; Shi, Liangtao 1 ; Liu, Gangcai 4 ;
作者机构： 1.Yunnan Acad Agr Sci, Inst Trop Ecoagri, Yuanmou 651300, Yunnan, Peoples R China
2.Mianyang Normal Univ, Sch Resources & Environm Engn, Mianyang 621000, Sichuan, Peoples R China
3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu, Sichuan, Peoples R China
5.Minist Water Resources, Chengdu 610041, Sichuan, Peoples R China
关键词： Nutrient limitation; Enzyme activity; C-N interaction; Arid and hot valley
期刊名称：EUROPEAN JOURNAL OF SOIL BIOLOGY （ 2020影响因子：2.846； 五年影响因子：3.618 ）
ISSN： 1164-5563
年卷期： 2020 年 98 卷
收录情况： SCI
摘要： The details of how vegetation rehabilitation affects soil enzyme activities via changes of soil nutrients are unclear. To investigate how soil carbon and available nitrogen affect soil enzyme activities during the process of vegetation restoration, a factorial experiment was conducted with vegetation cover and nitrogen addition on degraded lands, and then a carbon addition experiment was performed with soil incubation. Soil enzyme activities were significantly higher under vegetation plots than those under bare plots and were highly related to the soil total carbon and nitrogen concentrations. For soils from bare plots, C addition increased beta-1,4-glucosidase (BG) activities, beta-N-acetyl glucosaminidase (NAG) activities, leucine aminopeptidase (LAP) activities and acid phosphomonoesterase (AP) activities by 93%, 784%, 268% and 272%, respectively. By comparision, C addition only increased activities of BG, NAG, LAP and AP by 6%, 54%, 45% and 214% for soils from vegetation plots, respectively. Furthermore, the interaction between C and N significantly affected the activities of AP and BG. These findings indicate that the elevation of enzyme activities during vegetation rehabilitation is mainly driven by the relaxation of C-N limitation for microorganisms.
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