干旱区生态环境知识资源中心(Arid): 生物土壤结皮演替对土壤生态化学计量特征的影响

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	生物土壤结皮演替对土壤生态化学计量特征的影响
其他题名	The effects of biological soil crust succession on soil ecological stoichiometry characteristics
	高丽倩; 赵允格; 许明祥; 孙会; 杨巧云
来源期刊	生态学报
ISSN	1000-0933
出版年	2018
卷号	38 期号:2 页码:678-688
中文摘要	生物土壤结皮(生物结皮)是干旱半干旱地区重要的地表覆被物,能够固定碳氮,影响养分循环,从而可能引起土壤化学计量特征的变化。以黄土丘陵区不同演替阶段生物结皮为研究对象,研究该区生态恢复初期生物结皮演替对土壤碳(C) 、氮(N) 、磷(P)含量及其化学计量特征的影响。结果表明: (1)生物结皮显著增加了生物结皮层C、N、P含量,后期藓结皮较初期藻结皮C、N、P含量分别增加了161%、127%和9%,均显著高于其下010 cm土壤;(2)土壤C/N随着生物结皮演替变化较小,范围为10.011.8,C/P和N/P在演替后期分别是初期的2.4倍和2.1倍,均显著高于其下010 cm土壤;(3)生物结皮土壤C/N、C/P与N/P受坡向影响较大,并与藓生物量显著正相关,与土壤容重显著负相关;(4)生物结皮显著影响土壤C、N、P含量及其化学计量特征,使生物结皮层显著不同于其下层土壤及裸地;(5)生物结皮演替加速表层土壤养分恢复,影响程度可至其下2 cm土层。研究初次从土壤化学计量特征的角度揭示生物结皮对土壤养分循环的贡献,对干旱半干旱地区生态修复和管理具有指导意义。
英文摘要	Biological soil crusts (biocrusts) are ubiquitous living surface covers in arid and semi-arid regions.The succession of biocrusts exerts significant influence on soil nutrient cycles owing to their functions of carbon and nitrogen fixation.Therefore,soil ecological stoichiometry characteristics are likely to be affected by the succession of biocrusts.To explore the effects of biocrusts on the contents of organic carbon (C),total nitrogen (N),total phosphorus (P),and their stoichiometric characteristics,biocrusts in six successional stages,totaling 59 sites,were chosen from the hilly Loess Plateau region.Biocrusts and subsoils (02 cm,25 cm,and 510 cm) were sampled at each site.The contents of C,N,and P were analyzed and their ratios were calculated.The results showed that biocrusts significantly affected the contents of C,N,and P,and their ratios,which resulted in differences between biocrusts and the soils beneath them.Further,the differences increased with the succession of the biocrusts.The contents of C,N,and P significantly increased in the biocrust layers,which were significantly higher than that of the subsoils (010 cm).The contents of C,N,and P in biocrusts increased by 161%,127%,and 9%,respectively,in the later successional stage compared with that in the earlier stage.The ratios of C/N,C/P,and N/P in biocrusts were all significantly higher than in the soils beneath them(010 cm).Variances of C/N were lower than that of C/P and N/P,with a range from 10.0 to 11.8.The C/P and N/P ratios in the later successional stage of biocrusts were 2.4 and 2.1 times as high as that in the earlier successional stage,respectively.The slope aspect was the major influencing factor for the ecological stoichiometry characteristics of biocrusts.The ratios of C/N,C/P,and N/P were positively correlated with moss biomass and negatively correlated with soil bulk density.The recovery of topsoil nutrients was improved owing to the succession of biocrusts and the improvement of recovery appeared to be limited to a maximum depth of 2 cm under the biocrusts.Owing to the significant influences of biocrust succession on soil nutrients and their stoichiometric characteristics,and the differences between biocrusts and their subsoil,biocrusts play a crucial role for ecological restoration in arid and semi-arid regions.The results reveal the contribution of biocrusts to nutrient cycles from the perspective of soil stoichiometric characteristics and the study provides scientific basis to the ecological restoration and management in arid and semi-arid regions.
中文关键词	藓 ; 藻 ; 碳 ; 氮 ; 磷 ; 生态恢复 ; 干旱半干旱地区
英文关键词	moss cyanobacteria carbon nitrogen phosphorus ecological restoration arid and semi-arid regions
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:6155612
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238095
作者单位	高丽倩, 中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌, 712100.; 赵允格, 中国科学院水利部水土保持研究所;;西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌;;杨凌, ;; 712100;;712100.; 许明祥, 中国科学院水利部水土保持研究所;;西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌;;杨凌, ;; 712100;;712100.; 孙会, 北方民族大学生物科学与工程学院, 银川, 宁夏 750021, 中国.; 杨巧云, 西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌, 712100.
推荐引用方式 GB/T 7714	高丽倩,赵允格,许明祥,等. 生物土壤结皮演替对土壤生态化学计量特征的影响[J]. 西北农林科技大学,2018,38(2):678-688.
APA	高丽倩,赵允格,许明祥,孙会,&杨巧云.(2018).生物土壤结皮演替对土壤生态化学计量特征的影响.生态学报,38(2),678-688.
MLA	高丽倩,et al."生物土壤结皮演替对土壤生态化学计量特征的影响".生态学报 38.2(2018):678-688.