Fresh root decomposition pattern of two contrasting tree species from temperate agroforestry systems: effects of root diameter and nitrogen enrichment of soil

doi:10.1007/s11104-011-0830-y

	Fresh root decomposition pattern of two contrasting tree species from temperate agroforestry systems: effects of root diameter and nitrogen enrichment of soil
	Mao, Rong 1,2; Zeng, De-Hui 2; Li, Lu-Jun 1,2
刊名	PLANT AND SOIL
	2011-10-01
卷号	347 期号:1-2 页码:115-123
关键词	Cumulative Co(2) Production Mass Loss Pinus Tabulaeformis Populus Euramericana Cv. 'n3016' Root Quality
ISSN号	0032-079X
DOI	10.1007/s11104-011-0830-y
英文摘要	Fresh tree root decomposition induced by tillage is an important source of soil nutrients in agroforestry systems. Here we examined the effects of tree species, root size and soil N enrichment on fresh root decomposition under laboratory conditions. Fresh roots with two diameters (<2 and 2-5 mm) of Populus euramericana cv. 'N3016' (poplar) and Pinus tabulaeformis (pine) collected from agroforestry systems in Northeast China were used in the experiment. For each root treatment, four N levels (0, 50, 100 and 150 mu g N g(-1) soil) were added. We recognized N concentration and C/N ratio as the root quality variables, and determined decomposition rates as cumulative CO(2) production and mass loss. Poplar roots had higher N concentration and lower C/N ratio and decomposed faster than pine roots, and smaller roots decomposed faster than the corresponding larger roots. The effect of N addition on root decomposition varied from positive to negligible to negative, and depended on root quality and N addition rates. Increased N availability did not accelerate and even suppressed poplar root decomposition, whereas generally stimulated pine root decomposition. Our results suggest that root quality should be incorporated into the design of agroforestry systems. Moreover, the differential responses of N addition on decomposition of fresh roots with different quality provide insights into soil nutrient management in agroforestry practices.
WOS研究方向	Agriculture ; Plant Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000295590200010
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121901]
专题	中国科学院沈阳应用生态研究所
通讯作者	Zeng, De-Hui
作者单位	1.Chinese Acad Sci, NE Inst Geog & Agroecol, Changchun 130012, Peoples R China 2.Chinese Acad Sci, State Key Lab Forest & Soil Ecol, Inst Appl Ecol, Shenyang 110164, Peoples R China
推荐引用方式 GB/T 7714	Mao, Rong,Zeng, De-Hui,Li, Lu-Jun. Fresh root decomposition pattern of two contrasting tree species from temperate agroforestry systems: effects of root diameter and nitrogen enrichment of soil[J]. PLANT AND SOIL,2011,347(1-2):115-123.
APA	Mao, Rong,Zeng, De-Hui,&Li, Lu-Jun.(2011).Fresh root decomposition pattern of two contrasting tree species from temperate agroforestry systems: effects of root diameter and nitrogen enrichment of soil.PLANT AND SOIL,347(1-2),115-123.
MLA	Mao, Rong,et al."Fresh root decomposition pattern of two contrasting tree species from temperate agroforestry systems: effects of root diameter and nitrogen enrichment of soil".PLANT AND SOIL 347.1-2(2011):115-123.