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[1]王晶晶 黄刚 吕坤 苏延桂**.热带-亚热带森林不同植被类型的土壤酶活性及化学计量特征[J].应用与环境生物学报,2022,28(06):1-10.[doi:10.19675/j.cnki.1006-687x.2021.11055]
 WANG Jingjing,HUANG Gang**,Lü Kun & SU Yangui.Soil enzyme activity and stoichiometry of different vegetation types in tropical and subtropical forest[J].Chinese Journal of Applied & Environmental Biology,2022,28(06):1-10.[doi:10.19675/j.cnki.1006-687x.2021.11055]
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热带-亚热带森林不同植被类型的土壤酶活性及化学计量特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
28卷
期数:
2022年06期
页码:
1-10
栏目:
研究论文
出版日期:
2022-12-25

文章信息/Info

Title:
Soil enzyme activity and stoichiometry of different vegetation types in tropical and subtropical forest
作者:
王晶晶12 黄刚12 吕坤12 苏延桂12**
1 福建师范大学,福建省湿润亚热带生态-地理过程教育部重点实验室 福州 350007
2 福建师范大学地理研究所 福州 350007
Author(s):
WANG Jingjing12 HUANG Gang12** Lü Kun 12 & SU Yangui 12
1 Fujian Provincial Key Laboratory of Humid Subtropical Ecology-Geographical Processes, Ministry of Education, Fujian Normal University, Fuzhou 350007, China
2 Institute of Geography , Fujian Normal University, Fuzhou 350007, China
关键词:
土壤酶酶化学计量植被类型土壤微生物养分限制
Keywords:
soil enzyme enzyme stoichiometry forest vegetation type soil microbial nutrient limitation
DOI:
10.19675/j.cnki.1006-687x.2021.11055
摘要:
土壤酶及其生态化学计量比反映土壤微生物活性和对土壤养分供应的需求。为揭示土壤微生物胞外酶在不同植被类型和研究区域间的变化特征和主要影响因素,以热带(尖峰岭)和亚热带气候区(戴云山和九连山)混交林(落叶阔叶混交或针阔混交)和阔叶常绿林土壤为研究对象,分析与C、N和P元素循环有关的土壤酶活性(BG:β-葡萄糖苷酶;NAG:β-N-乙酰葡糖胺糖苷酶;LAP:亮氨酸氨基肽酶;AP:酸性磷酸酶)及其化学计量比在各气候区和植被类型间的变化规律。结果显示:气候区和植被类型对土壤养分含量及其计量比具有显著的交互作用,在热带森林(尖峰岭)常绿季雨林土壤有机碳(SOC)、全氮(TN)及全磷(TP)均高于混交林,在亚热带(九连山和戴云山)森林则相反;气候区和植被类型的交互作用对BG、NAG + LAP和AP酶均具有显著影响,BG酶和NAG + LAP酶在尖峰岭和戴云山混交林显著大于常绿阔叶林,在九连山则相反,AP酶在尖峰岭混交林显著大于常绿阔叶林,在九连山和戴云山则相反;森林碳、氮和磷获取酶的自然对数比率在热带、亚热带地区分别为1:0.70:1.71,1:0.82:1.61,表明存在总体磷限制,土壤BG:(NAG + LAP)在尖峰岭和九连山混交林显著大于常绿阔叶林,土壤BG:AP在尖峰岭和九连山常绿阔叶林显著大于混交林,土壤(NAG + LAP):AP在尖峰岭常绿阔叶林显著大于混交林,而在戴云山则相反;各气候区混交林酶向量长度大于常绿阔叶林,酶向量角度均大于45°,且向量角在尖峰岭和戴云山混交林小于常绿阔叶林,表明混交林微生物C限制普遍强于常绿阔叶林,而P限制则受气候区和植被类型的交互作用影响;BG:(NAG+LAP)与土壤C:N和N:P正相关,而(NAG + LAP):AP与SOC和TP正相关。本研究表明热带和亚热带森林土壤微生物普遍受磷限制,且不同植被类型间土壤SOC含量(底物供应)是微生物资源获取(酶活性及化学计量比)的主要影响因素。
Abstract:
Soil enzyme and its stoichiometry reflect the activity of soil microorganisms and their demand for soil nutrients. In this study, the soil enzyme related to the cycling of C, N and P elements (BG: β-Glucosidase; NAG: β-N-acetylglucosaminidase; LAP: leucine aminopeptidase; AP: acid phosphatase) and its stoichiometry were studied from mixed forests (deciduous broad-leaved or coniferous broad-leaved mixed forest) and broad-leaved evergreen forest in a tropical (Jianfengling) and two subtropical (Daiyun and Jiulian) regions to reveal their variation pattern and main influencing factors. The results showed that climate and vegetation type exerted a significant interactive effects on soil C and nutrient content, as well as stoichiometry. The soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) from the evergreen rainforest in tropical region (Jianfengling) were higher than those in mixed forest, but the opposite hold true in the subtropical region (Jiulian and Daiyun); The interaction of climate and vegetation type had significant effects on BG, NAG + LAP and AP. BG and NAG + LAP from mixed forest were significantly greater than those from evergreen broad-leaved forest in Jianfengling and Daiyun Mountain, on the contrary in Jiulian Mountain. AP was significantly greater from mixed forest than that from evergreen broad-leaved forest in Jianfengling, and on the contrary in Jiulian Mountain and Daiyun mountain; The log-transformed ratios of carbon, nitrogen and phosphorus acquisition enzymes were 1:0.70:1.71 and 1:0.82:1.61in tropical and subtropical areas respectively, indicating phosphorus limitation is common in the tropical and subtropical forests. Soil BG: (NAG + LAP) from mixed forest was significantly greater than that in evergreen broad-leaved forest in Jianfengling and Jiulian Mountain, and soil BG: AP from evergreen broad-leaved forest was significantly greater than that from mixed forest in Jianfengling and Jiulian Mountain, Soil (NAG + LAP): AP from evergreen broad-leaved forest was significantly greater than that from mixed forest in Jianfengling, while it was the opposite in Daiyun mountain; The length of enzyme vector from mixed forest was greater than that from evergreen broad-leaved forest. The angle of enzyme vector was greater than 45°, and it was smaller from mixed forest than that from evergreen broad-leaved forest in Jianfengling and Daiyun Mountain, indicating that microbial C limitation in mixed forest was generally stronger than that in evergreen broad-leaved forest, while microbial P limitation was affected by the interaction between climate and vegetation type; The ratio of BG: (NAG + LAP) was positively correlated with soil C: N and N: P, while (NAG + LAP): AP was positively correlated with SOC and TP. Our study indicate that soil microorganisms in tropical and subtropical forests are generally limited by phosphorus, and soil SOC content (substrate supply) in different vegetation types is the major influencing factor of microbial resource acquisition.

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更新日期/Last Update: 2022-03-16