干旱区生态环境知识资源中心(Arid): 黄土高原水蚀风蚀交错区生物结皮的地表粗糙度特征及其影响因素

Arid

	黄土高原水蚀风蚀交错区生物结皮的地表粗糙度特征及其影响因素
其他题名	Surface roughness of biological soil crusts and its influencing factors in the water-wind erosion crisscross region on the Loess Plateau of China
	王国鹏; 肖波; 李胜龙; 孙福海; 姚小萌
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2019
卷号	38 期号:10 页码:3050-3056
中文摘要	增加地表粗糙度是生物结皮影响干旱和半干旱地区地表水文与土壤侵蚀过程的重要途径。本文针对黄土高原水蚀风蚀交错区典型小流域,使用链条法测定了裸沙、物理结皮以及不同发育阶段生物结皮(藻、藻-藓混生、藓)的地表粗糙度,比较了不同地形(坡度和坡向)和土壤条件(土壤类型和含水量)下生物结皮地表粗糙度的差异,分析了生物结皮对地表粗糙度特征的影响及其与地形因素和土壤属性的相关关系。结果表明:与裸沙相比,随着物理结皮、藻结皮以及藻-藓混生结皮的相继发育,地表粗糙度由0.67持续增加至16.76(F = 194.31,P<0.01);各发育阶段中,藻-藓混生结皮的地表粗糙度最高,为无结皮土壤的25倍,但由藻-藓混生结皮发育至藓结皮后地表粗糙度骤减了52.7%(仍大于裸沙和物理结皮);生物结皮的地表粗糙度在10° ~30°坡度范围内差异不显著,但在30° ~ 40°坡度下其地表粗糙度显著增加(F = 10.05,P<0.01),增加幅度达25.5%;且阳坡藓结皮的地表粗糙度显著高于阴坡(t = -5.70,P<0.01),为阴坡的1.3倍;生物结皮的地表粗糙度随含水量变化波动较为剧烈,任意含水量下黄绵土上发育的藓结皮的地表粗糙度均高于风沙土上发育的藓结皮(F = 187.16,P<0.01),前者平均为后者的2.1倍;黄绵土上藓结皮的地表粗糙度与有机质含量呈显著负相关(r = -0.998,P = 0.04),而与其他土壤属性的相关性不显著。综上,黄土高原水蚀风蚀交错区生物结皮的发育显著增加了地表粗糙度,其关键影响因素是生物结皮的发育阶段以及坡度和坡向。
英文摘要	Surface hydrology and soil erosion processes in arid and semi-arid regions are affected by biological soil crusts (hereafter biocrusts) mainly through increasing soil surface roughness, which is of great importance but has not yet been fully investigated. In this study,we measured the surface roughness of bare sand,physical crusts,and biocrusts at different developmental stages (cyanobacteria,mixture of cyanobacteria and moss,and moss) by the chain method in a representative small watershed on the water-wind erosion crisscross region of the Loess Plateau. The surface roughness of biocrusts under different topography (slope gradient and direction) and soil conditions (soil types and water content) was investigated,and its correlations with the topographic factors and soil properties were analyzed. The results showed that soil surface roughness gradually increased from 0.67 to 16.76 (F = 194.31,P<0.01) when the physical crusts,cyanobacteriabiocrusts, and cyanobacteria-moss biocrusts successively developed from the bare sand. Across all developmental stages,the cyanobacteria-moss biocrusts had the highest surface roughness (25 times of that of the uncrusted soil),while that of the moss biocrusts was decreased by 52.7% as compared with that of the cyanobacteria-moss biocrusts (but still higher than the bare sand and physical crusts). The surface roughness of biocrusts exhibited no significant differences among different slopes ranging from 10° to 30°,but it was significantly increased by 30.5% when the slope increased from 30° to 40° (F = 10.05,P<0.01). Similarly,the surface roughness of biocrusts on the sunny slopes was 1.3 times of that on the shady slopes (t = -5.70,P<0.01). Furthermore,the surface roughness of biocrusts fluctuated greatly with increasing soil water content, with that developed on loessial soil being averagely 2.1 times (F = 187.16,P<0.01) of that on aeolian soil under any water content. The surface roughness of biocrusts on the loessial soil was significantly negatively correlated with organic matter content (r = -0.998,P = 0.04),but not with other soil properties. We concluded that biocrusts significantly increased soil surface roughness in the water-wind erosion crisscross region on the Loess Plateau,with developmental stage of the biocrusts,slope gradient,and slope direction being the key influencing factors.
中文关键词	链条法 ; 藻结皮 ; 藻-藓混生结皮 ; 藓结皮 ; 风沙土 ; 黄绵土
英文关键词	chain method cyanobacteria crust cyanobacteria and moss crust moss crust aeolian soil loessial soil
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6581501
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378980
作者单位	王国鹏, 中国农业大学资源与环境学院;;农业部华北耕地保育重点实验室, ;;农业部华北耕地保育重点实验室, ;;, 北京;;北京 100193;;100193, 中国.; 肖波, 中国农业大学资源与环境学院;;农业部华北耕地保育重点实验室, ;;农业部华北耕地保育重点实验室, ;;, 北京;;北京 100193;;100193, 中国.; 李胜龙, 中国农业大学资源与环境学院;;农业部华北耕地保育重点实验室, ;;农业部华北耕地保育重点实验室, ;;, 北京;;北京 100193;;100193, 中国.; 孙福海, 中国农业大学资源与环境学院;;农业部华北耕地保育重点实验室, ;;农业部华北耕地保育重点实验室, ;;, 北京;;北京 100193;;100193, 中国.; 姚小萌, 中国农业大学资源与环境学院;;农业部华北耕地保育重点实验室, ;;农业部华北耕地保育重点实验室, ;;, 北京;;北京 100193;;100193, 中国.
推荐引用方式 GB/T 7714	王国鹏,肖波,李胜龙,等. 黄土高原水蚀风蚀交错区生物结皮的地表粗糙度特征及其影响因素[J],2019,38(10):3050-3056.
APA	王国鹏,肖波,李胜龙,孙福海,&姚小萌.(2019).黄土高原水蚀风蚀交错区生物结皮的地表粗糙度特征及其影响因素.生态学杂志,38(10),3050-3056.
MLA	王国鹏,et al."黄土高原水蚀风蚀交错区生物结皮的地表粗糙度特征及其影响因素".生态学杂志 38.10(2019):3050-3056.