干旱区生态环境知识资源中心(Arid): 降水水平对荒漠草原生物土壤结皮碳、氮和微生物的影响

Arid

	降水水平对荒漠草原生物土壤结皮碳、氮和微生物的影响
其他题名	Effects of precipitation on carbon,nitrogen and microbial characteristics of biological soil crusts in a desert steppe of Northern China
	吴旭东; 蒋齐; 任小玢; 俞鸿千; 王占军; 何建龙; 季波; 杜建民
来源期刊	草业学报
ISSN	1004-5759
出版年	2021
卷号	30 期号:7 页码:1004-5759
中文摘要	生物土壤结皮是荒漠化地区地表景观的基本组成部分和土壤养分的主要供给来源,降水格局影响该区域生态系统的稳定性。以自然降水为对照,通过使用遮雨棚和喷灌系统控制降水输入,探究降水量对生物土壤结皮及下层土壤碳、氮和微生物的影响,为气候变化对荒漠草原生态系统稳定性的影响提供基础数据。结果表明:1)-50%降水处理有利于土壤有机碳(SOC)、土壤微生物生物量碳(SMB-C)和土壤真菌的积累,并提高了结皮层及中间土层全氮(TN)含量和真菌数量,+50%降水处理提高了各土层土壤细菌数量、结皮层以及中间层土壤微生物生物量氮(SMB-N)含量,并显著降低了各土层土壤C∶N、SMB-C∶SMB-N和真菌数量∶细菌数量,不同降水处理下土壤SOC、SMB-C、SMB-N含量、细菌和真菌数量均随土层深度显著下降;2)细菌对降水减少更为敏感,而真菌比细菌更能抵御干旱气候,土壤细菌和真菌对降水变化具有不同的适应策略;3)-50%降水处理有利于土壤养分的恢复,对结皮层以下土层土壤养分的恢复尤为明显,+50%降水处理导致结皮层和深层土壤养分略有退化。
英文摘要	Biological soil crusts are fundamental components and surface landscape in arid regions,and the main source of soil nutrients also depends on them.However,the rainfall pattern affects the stability of the regional ecosystem in the desert region of Northern China.This paper aims to investigate the effects of precipitation on soil organic carbon,total nitrogen and microbial characteristics of biological soil crusts in a desert steppe.The precipitation was regulated by the measurement of artificial rain using rainwater shed and sprinkler irrigation technologies,in order to evaluate precipitation effects on the biological soil crusts in desert steppe compared with natural precipitation.12 precipitation treatments(6 m*6 m)were set up at the test station in early March 2018,where 3 m wide buffer zone was designed between each time.Control conditions of precipitation were designed via the rainwater shed and sprinkler irrigation system,comprising 3 precipitation treatments,natural precipitation(CK),-50%(50% reduction in precipitation),and +50%(50% increase in precipitation).Each treatment had 4 replicates for statistical evaluation of the reproducible.In the same period,small weather stations were set up in the test area.We collected soil samples from each site stratified into three soil depths:the crust layer(0-0.5 cm),a middle layer(0.5-3.0 cm)and deep layers(3-10 cm).There were three main findings:1)The-50% was conducive to the accumulation of soil organic carbon(C)and soil microbial carbon(SMB-C)and increased the presence of soil fungi,while also increasing the soil total nitrogen(TN)content and presence of fungi in the crust layer and middle layer.+50% increased the number of soil bacteria in each soil layer,the crust layer and the soil microbial biomass nitrogen(SMB-N)content in the middle layer,and significantly reduced the soil C∶N,SMB-C∶ SMB-N in each soil layer and number of fungi:ratio of number of bacteria,the contents of SOC,SMB-C,SMB-N,and the number of bacteria and fungi under different precipitation treatments all decreased significantly with soil depth;2)Bacteria were more sensitive to precipitation reduction,while fungi were more resistant to aridity than bacteria.Soil bacteria and fungi had different adaptation strategies to changes in precipitation.3)The-50% treatment was beneficial to the restoration of soil nutrients,especially to the restoration of soil nutrients in the middle layer underlying the crust layer,while the +50% treatment resulted in slight degradation of the crust layer and decreased deep layer soil nutrients.
中文关键词	碳 ; 氮 ; 微生物 ; 生物土壤结皮 ; 降水 ; 荒漠草原
英文关键词	carbon nitrogen microbial characteristics biological soil crusts precipitation desert steppe
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7007057
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364939
作者单位	吴旭东, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.; 蒋齐, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.; 任小玢, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.; 俞鸿千, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.; 王占军, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.; 何建龙, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.; 季波, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.; 杜建民, 宁夏农林科学院荒漠化防治研究所, 银川, 宁夏 750002, 中国.
推荐引用方式 GB/T 7714	吴旭东,蒋齐,任小玢,等. 降水水平对荒漠草原生物土壤结皮碳、氮和微生物的影响[J],2021,30(7):1004-5759.
APA	吴旭东.,蒋齐.,任小玢.,俞鸿千.,王占军.,...&杜建民.(2021).降水水平对荒漠草原生物土壤结皮碳、氮和微生物的影响.草业学报,30(7),1004-5759.
MLA	吴旭东,et al."降水水平对荒漠草原生物土壤结皮碳、氮和微生物的影响".草业学报 30.7(2021):1004-5759.