干旱区生态环境知识资源中心(Arid): 民勤绿洲边缘沙丘生物土壤结皮发育对浅层土壤质地、养分含量及微生物数量的影响

Arid

	民勤绿洲边缘沙丘生物土壤结皮发育对浅层土壤质地、养分含量及微生物数量的影响
其他题名	Effect of biological soil crust succession on soil texture, nutrient contents, and microbial populations of dune surfaces at the edge of the Minqin Oasis
	何芳兰 1; 郭春秀 2; 吴旲 2; 刘左军 3; 徐文 3; 金红喜 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2017
卷号	37 期号:18 页码:6064-6073
中文摘要	为探明干旱沙区沙丘生物土壤结皮形成及发育对浅层土壤质地、养分含量及微生物数量的影响,以民勤绿洲边缘结皮前期阶段(NCS)、物理-藻类结皮阶段(PACS)、藻类-地衣结皮阶段(ALCS)以及地衣-藓类结皮阶段(LMCS)的01 cm层土壤为研究对象,研究了土壤颗粒组成、土壤有机质、全氮、速效磷、速效钾含量以及土壤微生物数量动态变化。结果表明:1)生物土壤结皮在NCS向ALCS的发育过程中,其有效地提高了01 cm层土壤细沙粒(0-200 m)含量,同时降低了粗砂粒(200-2000 m)含量;在ALCS向LMCS演替过程中,土壤粒度组成无明显变化。2) 土壤结皮形成与发育对01 cm层土壤有机质、全氮、速效磷以及速效钾含量均有显著影响(P<0.05) ,4种养分含量均随生物结皮演替逐渐增大。3)在土壤结皮形成与演替过程中,01 cm层土壤细菌、放线菌以及真菌数量均呈现出先增大后减小趋势(峰值均出现在PACS),土壤总藻生物量一直处于持续增大趋势;在512月期间,土壤微生物数量或生物量变化均呈现出先增大后减小趋势。4)土壤结皮在NCS向PACS演替过程中,土壤颗粒组成的改变是土壤微生物量及养分变化的主要驱动因子;PACS向LMCS演替过程,土壤藻类、地衣、藓类是提高土壤养分含量的主要因子。表明民勤绿洲边缘沙丘生物土壤结皮形成与发育能有效地改善浅层土壤质量,提高土壤肥力,同时对土壤生态系统改善及生态环境保护具有重要作用。
英文摘要	The Minqin Oasis is located in the northwest Hexi Corridor, and the northern, western, and eastern edges are surrounded by the Tengger and Badain Jaran Deserts. To manage sand and prevent sandstorms, large tracts of Haloxylon ammodendron plantations have previously been planted on fixed and semi-fixed sand dunes of the Minqin Oasis fringe. At present, many biological soil crusts have formed and are developing in the fixed woodland. To ascertain whether the formation and development of dune biological soil crust affects soil texture, nutrient contents, and microorganism populations, the woodland of H. ammodendron plantations were divided into a no crust stage (NCS), physical-algal crust stage (PACS),algal-lichen crust stage (ALCS),and lichen-moss crust stage (LMCS) according to crust coverage, crust thickness, and underlying and ground covers. Here, the contents of soil clay, silt, fine sand, and coarse sand particles, organic matter,total nitrogen,available phosphorus and potassium,and the populations or biomass of bacteria,fungi, and actinomycetes in the 01 cm soil layer were measured and studied. The results showed that 1) the formation and development of biological soil crusts from NCS to ALCS not only considerably increased the content of fine soil particles (0200 m) but also decreased soil coarse particle (2002000 m) contents. However, there was no significant change in soil particle composition during the succession from ALCS to LMCS; 2) the succession of biological soil crusts obviously influenced the contents of soil organic matter, total nitrogen, available phosphorus and potassium, and their contents gradually increased with succession ; 3) during biological soil crust succession, all quantities of soil bacteria,fungi,and actinomycetes showed a trend of initially increasing and then decreasing, peaking in PACS. Simultaneously, the soil total algal biomass continuously increased. Furthermore, microbial quantities or biomass also presented a trend of initially increasing and then decreasing from May to December ; and 4) in succession from NCS to PACS, the change of soil particle composition was one of the main factors causing variations in soil organic matter,total nitrogen,available phosphorus and potassium, bacteria, fungi, and actinomycetes. During succession from PACS to LMCS, soil algae, lichen, and mosses were the main factors improving soil organic matter, total nitrogen, and available phosphorus and potassium contents. It was suggested that the formation and development of the biological soil crust distributed in the surface layer soil of Minqin Oasis fringe dunes not only ameliorated shallow soil quality effectively, but also played a considerable role in improving soil ecosystems and protecting the ecological environment.
中文关键词	民勤绿洲 ; 生物土壤结皮 ; 土壤粒度 ; 养分
英文关键词	Minqin Oasis biological soil crust soil particle size nutrients
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6068702
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236512
作者单位	1.甘肃省治沙研究所, 甘肃河西走廊森林生态系统国家定位观测研究站; 2.甘肃省治沙研究所, 兰州, 甘肃 730070, 中国; 3.兰州理工大学生命科学与工程学院, 兰州, 甘肃 730050, 中国
推荐引用方式 GB/T 7714	何芳兰,郭春秀,吴旲,等. 民勤绿洲边缘沙丘生物土壤结皮发育对浅层土壤质地、养分含量及微生物数量的影响[J]. 甘肃省治沙研究所,2017,37(18):6064-6073.
APA	何芳兰,郭春秀,吴旲,刘左军,徐文,&金红喜.(2017).民勤绿洲边缘沙丘生物土壤结皮发育对浅层土壤质地、养分含量及微生物数量的影响.生态学报,37(18),6064-6073.
MLA	何芳兰,et al."民勤绿洲边缘沙丘生物土壤结皮发育对浅层土壤质地、养分含量及微生物数量的影响".生态学报 37.18(2017):6064-6073.