干旱区生态环境知识资源中心(Arid): 宁夏荒漠草原枯落物分解过程中植物营养元素变化特征

Arid

	宁夏荒漠草原枯落物分解过程中植物营养元素变化特征
其他题名	Changes of Plant Nutrient Element during Litter Decomposition Process in Desertified Steppe of Ningxia
	赵娟; 刘任涛; 刘佳楠; 常海涛; 张安宁; 陈蔚
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2019
卷号	28 期号:3 页码:481-487
中文摘要	以宁夏荒漠草原优势植物赖草(Leymus secalinus)、胡枝子(Lespedeza bicolor)及二者混合物为研究对象,采用分解袋法研究了不同处理间植物枯落物营养元素残留率变化特征,旨在揭示荒漠草原优势植物枯落物分解过程中营养元素变化规律。结果显示,(1)随着分解时间变化,P在3种处理植物枯落物中均呈释放-富集-释放的规律;K在胡枝子和混合枯落物中呈释放-富集-释放的规律,而在赖草枯落物中则仅表现为释放现象;N在赖草和胡枝子枯落物中呈释放-富集-释放的规律,而在混合枯落物中则仅表现为释放现象。(2)经过640 d分解,P和K残留率表现为胡枝子枯落物>赖草枯落物>混合枯落物,N残留率表现为赖草枯落物>混合枯落物>胡枝子枯落物。(3)经过640 d分解,植物枯落物P、K和N在3种处理间整体上呈净释放状态。研究表明,宁夏荒漠草原植物枯落物营养元素变化特征与植物种的差异性密切相关;混合植物枯落物P和K释放率高于单一种植物枯落物,而N释放率表现为胡枝子枯落物高于赖草及二者混合枯落物。
英文摘要	An investigation on nutrient elemental residual rate of plant litter of dominant Leymus secalinus, Lespedeza bicolor and their mixture was carried on by the method of litterbag sampling. The objective of the present study is to probe into the changes of plant nutrient element during litter decomposition process in desertified steppe of Ningxia. The results showed: (1) As the decomposition time changed, there was an alternatives of release-accumulation-release course of plant P in three litter treatments. There was an alternative of release-accumulation-release course of plant K in L. bicolor and their mixture litter, whereas there was a release course of plant K in L. secalinus litter. There was an alternative of release-accumulation-release course of plant N in L. bicolor and L. secalinus litter, whereas there was a release course of plant N in in their mixture litter. (2) At the sampling time of 640 days, the residual rate of plant litter P and K was found to follow an order of L. bicolor>L. secalinus>mixture, whereas plant litter N was found to follow an order of L. secalinus>mixture>L. bicolor. And (3) during the whole decomposition process, plant litter P, K and N were found to indicate a release course in three treatments. It was concluded that the changes of nutrient element was closely related to litter differences in terms of plant species. The release rate of plant P and K in mixture litter was suggested to be greater compared with single plant litter, whereas that of plant N in L. bicolor litter was suggested to be greater compared with L. secalinus and their mixture litter.
中文关键词	养分残留率 ; 富集 ; 释放 ; 枯落物分解 ; 荒漠草原
英文关键词	nutrient residual rate accumulation release litter decomposition desertified steppe
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6478047
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316169
作者单位	宁夏大学, 西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	赵娟,刘任涛,刘佳楠,等. 宁夏荒漠草原枯落物分解过程中植物营养元素变化特征[J]. 宁夏大学,2019,28(3):481-487.
APA	赵娟,刘任涛,刘佳楠,常海涛,张安宁,&陈蔚.(2019).宁夏荒漠草原枯落物分解过程中植物营养元素变化特征.生态环境学报,28(3),481-487.
MLA	赵娟,et al."宁夏荒漠草原枯落物分解过程中植物营养元素变化特征".生态环境学报 28.3(2019):481-487.