干旱区生态环境知识资源中心(Arid): Effects of grassland amelioration on terrestrial ecosystem nutrients:a case study in Jianou Niukenglong Grassland Ecosystem Experimental Station, Fujian Province

Arid

	Effects of grassland amelioration on terrestrial ecosystem nutrients:a case study in Jianou Niukenglong Grassland Ecosystem Experimental Station, Fujian Province
其他题名	草地改良对陆地生态系统养分的影响--以福建省建瓯市牛坑龙草地生态系统试验站为例
	Zhu Liangqi; Xu Shuming; Chen Peiyun
来源期刊	Journal of Geographical Sciences
ISSN	1009-637X
出版年	2004
卷号	14 期号:3 页码:313-322
英文摘要	This paper studies the effects of land cover changes on distributions and circulations of nutrients in a terrestrial ecosystem, taking Jianou Niukenglong Grassland Ecosystem Experimental Station as a case study. During a two year experiment from 1994 to 1996, the land cover types were changed from desert slopeland to grasslands, in particular, Chamaecrista rotundifolia(pers) green +Pasalum thunbergii and Glvcine max var. + Pasalum thunbergii. In order to study land cover change cffects on nutrients in the terrestrial ecosystem, we selected organic materials (OMs), nitrogen (N),phosphorus (P), potassium (K) and aluminum (Al) to study their changes in total soil nutrient concentrations, nutrient reserves in soil, distributions and reservations of nutrients in distinct grassland communities and overall nutrient contents reserved in terrestrial ecosystem, and their circulation with land cover change. The experimental results indicate that with the increase of vegetation coverage, the total concentrations of N, P and K grow rapidly in the soil, but that of Al decreases markedly. The increases of the total concentrations of N, P and K were mainly the consequences of changes of the factors that affect soil evolution, e.g., soil moisture, and changes of soil evolution processes, e.g.,weathering rate and the decrease of soil erosion. These changes were caused by land coverage growth from desert slopeland to grassland. With the change of the land cover types and the increase of land coverage, the activity of Al accelerated as well, and the vertical penetration and lateral penetration of Al have been increased. Therefore, the loss of Al within the experimental terrestrial ecosystem was inevitable, and the total concentration and reserve of Al in soil have become smaller and smaller, in spite of the growth of grass absorbing some amounts of Al. The Al reserve has increased in vegetation,but it has declined in total terrestrial ecosystem. Land cover change also affects the circulations of nutrients in the terrestrial ecosystem and for the purpose of study on nutrient circulations, we choose to study plant absorption, litter and reservation of nutrients to establish an index to indicate the situations of nutrient circulations within terrestrial ecosystems. The results indicate that in the two land cover types (two grassland ecosystems), the sequence of nutrient circulation indices are N ＞ K ＞ P ＞ Al in Chamaecrista rotundifolia(pers) green + Pasalum thunbergii and P ＞ N ＞ K ＞ Al in Glycine max var. +Pasalum thunbergii. On the basis of the study, we can conclude that land cover change affects both distributions and circulations in the terrestrial ecosystem, and that different changes have distinct influences on distributions and circulations. Some nutrients were affected differently in some contents.
英文关键词	land use/land cover change terrestrial ecosystem concentration of nutrient nutrientcirculation
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:1844817
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334870
作者单位	Zhu Liangqi, College of Environment and Planning, Key Research Institute of Yellow River Civilization and Sustainable Development, Henan University, Kaifeng, Henan 475001, China.; Xu Shuming, College of Environment and Planning, Key Research Institute of Yellow River Civilization and Sustainable Development, Henan University, Kaifeng, Henan 475001, China.; Chen Peiyun, College of Environment and Planning, Key Research Institute of Yellow River Civilization and Sustainable Development, Henan University, Kaifeng, Henan 475001, China.
推荐引用方式 GB/T 7714	Zhu Liangqi,Xu Shuming,Chen Peiyun. Effects of grassland amelioration on terrestrial ecosystem nutrients:a case study in Jianou Niukenglong Grassland Ecosystem Experimental Station, Fujian Province[J],2004,14(3):313-322.
APA	Zhu Liangqi,Xu Shuming,&Chen Peiyun.(2004).Effects of grassland amelioration on terrestrial ecosystem nutrients:a case study in Jianou Niukenglong Grassland Ecosystem Experimental Station, Fujian Province.Journal of Geographical Sciences,14(3),313-322.
MLA	Zhu Liangqi,et al."Effects of grassland amelioration on terrestrial ecosystem nutrients:a case study in Jianou Niukenglong Grassland Ecosystem Experimental Station, Fujian Province".Journal of Geographical Sciences 14.3(2004):313-322.