干旱区生态环境知识资源中心(Arid): 干热河谷土壤酶活性对碳氮添加的响应

Arid

	干热河谷土壤酶活性对碳氮添加的响应
其他题名	Response of soil enzyme activities to carbon and nitrogen addition in an arid,hot valley
	樊博; 史亮涛; 潘志贤; 何光熊; 孙毅; 闫帮国
来源期刊	生态学报
ISSN	1000-0933
出版年	2018
卷号	38 期号:23 页码:8604-8611
中文摘要	碳氮是生态系统物质循环中的关键元素,然而碳氮对土壤生态系统功能是否具有交互作用还缺乏深入研究。通过干热河谷土壤的葡萄糖和硝酸铵的交互添加实验,研究了氮、碳添加及其交互作用对干热河谷土壤酶活性及其化学计量学特征的影响。结果表明:碳氮交互作用显著影响了葡萄糖苷酶、酸性磷酸酶和亮氨酸胺肽酶活性。在对照样方的土壤中,碳添加使葡萄糖苷酶活性降低了31.4%;在施氮样方的土壤中,碳添加使葡萄糖苷酶活性增加了54.4%。对照样方中的土壤中,碳添加对酸性磷酸酶和亮氨酸胺肽酶活性促进作用较小(分别增加了102.4%和28.8%);相比之下,在施氮样方的土壤中,碳添加使酸性磷酸酶和亮氨酸胺肽酶活性分别增加了302.2%和68.8%。碳添加对葡萄糖苷酶和酸性磷酸酶活性的促进作用与土壤初始有效氮含量显著正相关。几丁质酶活性在碳添加下增加了53.7%,对氮添加没有响应。碳氮交互作用也显著影响了 C:N和C:P的水解酶化学计量关系。在对照样方中碳添加使C:N水解酶化学计量比降低了16.9%,C:P水解酶化学计量比降低了19.9%;而在施氮样方土壤中,碳添加的影响较小C:N和C:P水解酶化学计量比分别降低了1.9%和5.8%。碳氮交互作用对干热河谷土壤酶活性的影响表明碳氮在土壤生态系统功能具有重要作用。
英文摘要	Atmospheric nitrogen (N) deposition has profound effects on the biogeochemical cycling of carbon (C) and N.The interactions between C and N can affect biogeochemical cycling by modifying soil enzyme activities;however,these interactions still need to be explored.Using a factorial glucose and ammonium nitrate addition experiment,we investigated how C,N,and their interactions affect soil enzyme activities and enzymatic stoichiometry in an arid,hot valley.The enzymes in this survey were involved in the acquisition of C (beta-1,4-glucosidase),N (leucine aminopeptidase and chitinase),and phosphorus (P) (acid phosphatase).C:N:P enzymatic stoichiometry was calculated as In (beta-1,4-glucosidase):In (leucine aminopeptidase+chitinase):ln(acid phosphatase).The results showed that interactions between C and N significantly affected activities of beta-1,4-glucosidase,acid phosphatase,and leucine aminopeptidase.C addition decreased beta-1,4-glucosidase activities by 31.4% in soils collected from control plots,but increased beta-1,4-glucosidase activities by 54.4% in soils collected from N addition plots.The effects of C addition on activities of acid phosphatase and leucine aminopeptidase in soils collected from control plots were relatively small (increased by 102.4% and 28.8% respectively).In comparison,C addition increased acid phosphatase and leucine aminopeptidase activities by 302.2% and 68.8%,respectively,in soils collected from N addition plots.The promoting effects of C addition on beta-1,4-glucosidase and acid phosphatase activities were positively correlated with soil initial N availabilities.Chitinase activities increased by 53.7% under C addition,but did not respond to N addition.C and N also interacted,affecting the stoichiometry of C:N and C:P acquisition activities.C addition decreased C:N acquisition activities by 16.9% and C:P acquisition activities by 19.9% in soils collected from control plots.However,the effects of C addition were small in soils collected from N addition plots with decreases of C:N acquisition activities by 1.9% and C:P acquisition activities by 5.8%.The results revealed that interactions between C and N play a critical role in regulating soil enzyme activities in this arid,hot land and may be a key factor determining soil ecosystem functioning.
中文关键词	干热河谷 ; 土壤酶 ; 生态化学计量学 ; 碳
英文关键词	dry and hot valley soil enzymes ecological stoichiometry carbon
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6390533
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238172
作者单位	云南省农业科学院热区生态农业研究所;;元谋干热河谷植物园, ;;, 元谋;;元谋, ;; 651300;;651300
推荐引用方式 GB/T 7714	樊博,史亮涛,潘志贤,等. 干热河谷土壤酶活性对碳氮添加的响应[J],2018,38(23):8604-8611.
APA	樊博,史亮涛,潘志贤,何光熊,孙毅,&闫帮国.(2018).干热河谷土壤酶活性对碳氮添加的响应.生态学报,38(23),8604-8611.
MLA	樊博,et al."干热河谷土壤酶活性对碳氮添加的响应".生态学报 38.23(2018):8604-8611.