干旱区生态环境知识资源中心(Arid): Contribution of Litter and Root to Soil Nutrients in Different Rocky Desertification Grasslands in a Karst Area

Arid

DOI	10.3390/plants13162329
	Contribution of Litter and Root to Soil Nutrients in Different Rocky Desertification Grasslands in a Karst Area
	Wang, Yuefeng; Wang, Jigao; Wang, Yini; Wang, Xiaojing; Jin, Baocheng; Chen, Chao; Zhao, Xuechun
通讯作者	Zhao, XC
来源期刊	PLANTS-BASEL
ISSN	2223-7747
出版年	2024
卷号	13 期号:16
英文摘要	Litter and root decomposition is an important source of soil organic matter and nutrients. To ascertain the contribution of litter and root to natural grassland nutrients in rocky desertification areas, from March 2017 to January 2018, the continuous soil column method, collector method, and litter decomposition method were used to study the soil nutrients, litter and root biomass, decomposition, and nutrient release of potential, moderate, and severe rocky desertification grasslands, as well as their responses to rocky desertification. The results showed that the litter and root decomposition rate showed a trend of being first fast and then slow, and the decomposition rate of litter and root was greater than 50% after 300 days. The annual litter decomposition rates of potential, moderate, and severe rocky desertification grasslands were 69.98%, 62.14%, and 49.79%, respectively, and the annual decomposition rates of root were 73.64%, 67.61%, and 64.09%, respectively. With a deepening degree of rocky desertification, the litter and root decomposition rate decreased. The decomposition coefficients, k, of litter in potential, moderate, and severe rocky desertification grasslands were 1.128, 0.896, and 0.668, respectively, and the decomposition coefficients, k, of root were 1.152, 1.018, and 0.987, respectively. The nutrient release processes of litter and root were different, and the release mode ultimately manifests as release. In rocky desertification grasslands, the organic carbon (OC), total nitrogen (TN), total phosphorus (TP), and total potassium (TK) released by litter and root decomposition were 18.93-263.03 gm-2yr-1, 1.79-5.59 gm-2yr-1, 0.18-0.47 gm-2yr-1, and 0.66-3.70 gm-2yr-1, respectively. The contribution of root to soil nutrients was greater than that of litter. The degree of rocky desertification was negatively correlated with the biomass, decomposition rate, and nutrient return amount of litter and root. The results of this study provide direct field evidence and illustrate the contribution of litter and root decomposition in rocky desertification grasslands to soil nutrients.
英文关键词	rocky desertification grasslands litter root nutrient release
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001304871200001
WOS关键词	DECOMPOSITION ; TURNOVER ; DYNAMICS ; CARBON ; RELEASE ; FORESTS ; CLIMATE ; QUALITY ; BIOMASS ; FAUNA
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405175
推荐引用方式 GB/T 7714	Wang, Yuefeng,Wang, Jigao,Wang, Yini,et al. Contribution of Litter and Root to Soil Nutrients in Different Rocky Desertification Grasslands in a Karst Area[J],2024,13(16).
APA	Wang, Yuefeng.,Wang, Jigao.,Wang, Yini.,Wang, Xiaojing.,Jin, Baocheng.,...&Zhao, Xuechun.(2024).Contribution of Litter and Root to Soil Nutrients in Different Rocky Desertification Grasslands in a Karst Area.PLANTS-BASEL,13(16).
MLA	Wang, Yuefeng,et al."Contribution of Litter and Root to Soil Nutrients in Different Rocky Desertification Grasslands in a Karst Area".PLANTS-BASEL 13.16(2024).