Leaching disturbed the altitudinal distribution of soil organic phosphorus in subalpine coniferous forests on Mt. Gongga, SW China

doi:10.1016/j.geoderma.2018.04.015

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Leaching disturbed the altitudinal distribution of soil organic phosphorus in subalpine coniferous forests on Mt. Gongga, SW China
	He, Xiaoli1,2 ; Zhou, Jun1 ; Wu, Yanhong1 ; Bing, Haijian1 ; Sun, Hongyang1 ; Wang, Jipeng3
刊名	GEODERMA
	2018-09-15
卷号	326 页码:144-155
关键词	Organic phosphorus fractions Bioavailable phosphorus Altitudinal distribution Leaching P loss Subalpine ecosystem
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2018.04.015
英文摘要	Little information is available about the leaching effects on the altitudinal distribution of soil organic phosphorus (OP), even though this process commonly occurs in most humid montane. Our aims were to decipher spatial variations in OP fractions and to clarify the effects of leaching on these variations along the altitudinal gradient (2628, 2781, 3044 and 3210 m a.s.l.) on Mt. Gongga, southwest China. The results showed that the stocks of total OP (TOP) and moderately resistant OP (MROP) increased roughly upslope, with their minimums (824.69 and 410.56 kg ha(-1), respectively) at 2781 m. The concentrations and stocks of labile OP (LOP) markedly increased with altitude. The stocks of moderately labile OP (MLOP) and highly resistant OP (HROP) did not vary significantly among the four sites. The TOP distribution was likely related to the decrease of mineralization rate caused by the decreasing temperature upslope, and also disturbed by the leaching process. In addition, distributions of other P fractions were also regulated by this process. A larger loss of bioavailable P (Bio-P) occurred at the lower altitudes (2628 and 2781 m) due to more intensive leaching. This larger loss was compensated by microbial processes, as sharp decline in microbial biomass P and intensive mineralization of LOP via higher enzyme activities were observed. The MLOP and MROP were the main OP fractions that were downward migrated with fulvic acids, amorphous Fe and Al. The results highlight the role of leaching in regulating distributions of OP and Bio-P along altitudinal gradients in montane ecosystems.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000433648800013
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/21446]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Wu, Yanhong
作者单位	1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	He, Xiaoli,Zhou, Jun,Wu, Yanhong,et al. Leaching disturbed the altitudinal distribution of soil organic phosphorus in subalpine coniferous forests on Mt. Gongga, SW China[J]. GEODERMA,2018,326:144-155.
APA	He, Xiaoli,Zhou, Jun,Wu, Yanhong,Bing, Haijian,Sun, Hongyang,&Wang, Jipeng.(2018).Leaching disturbed the altitudinal distribution of soil organic phosphorus in subalpine coniferous forests on Mt. Gongga, SW China.GEODERMA,326,144-155.
MLA	He, Xiaoli,et al."Leaching disturbed the altitudinal distribution of soil organic phosphorus in subalpine coniferous forests on Mt. Gongga, SW China".GEODERMA 326(2018):144-155.