QQ客服 官方微博 反馈留言

	Identification of Factors Influencing the Restoration of Cyanobacteria-Dominated Biological Soil Crusts
	Bu C. F. ; Wu S. F. ; Yang Y. S. ; Zheng M. G.
	2014
关键词	gurbantunggut desert nitrogenase activity northwestern china algal crusts biomass stabilization inoculation erosion surface
英文摘要	Biological soil crusts (BSCs) cover >35% of the Earth's land area and contribute to important ecological functions in arid and semiarid ecosystems, including erosion reduction, hydrological cycling, and nutrient cycling. Artificial rapid cultivation of BSCs can provide a novel alternative to traditional biological methods for controlling soil and water loss such as the planting of trees, shrubs, and grasses. At present, little is known regarding the cultivation of BSCs in the field due to lack of knowledge regarding the influencing factors that control BSCs growth. Thus, we determined the effects of various environmental factors (shade; watering; N, P, K, and Ca concentrations) on the growth of cyanobacteria-dominated BSCs from the Sonoran Desert in the southwestern United States. The soil surface changes and chlorophyll a concentrations were used as proxies of BSC growth and development. After 4 months, five factors were found to impact BSC growth with the following order of importance: NH4NO3 approximate to watering frequency>shading>CaCO3 approximate to KH2PO4. The soil water content was the primary positive factor affecting BSC growth, and BSCs that were watered every 5 days harbored greater biomass than those watered every 10 days. Groups that received NH4NO3 consistently exhibited poor growth, suggesting that fixed N amendment may suppress BSC growth. The effect of shading on the BSC biomass was inconsistent and depended on many factors including the soil water content and availability of nutrients. KH2PO4 and CaCO3 had nonsignificant effects on BSC growth. Collectively, our results indicate that the rapid restoration of BSCs can be controlled and realized by artificial "broadcasting" cultivation through the optimization of environmental factors.
出处	Plos One
卷	9
期	3
收录类别	SCI
语种	英语
ISSN号	1932-6203
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29966]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Bu C. F.,Wu S. F.,Yang Y. S.,et al. Identification of Factors Influencing the Restoration of Cyanobacteria-Dominated Biological Soil Crusts. 2014.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。