Effects of Experimental Nitrogen Addition on Nutrients and Nonstructural Carbohydrates of Dominant Understory Plants in a Chinese Fir Plantation

doi:10.3390/f10020155

	Effects of Experimental Nitrogen Addition on Nutrients and Nonstructural Carbohydrates of Dominant Understory Plants in a Chinese Fir Plantation
	Wang, Fangchao 1; Chen, Fusheng 1,2; Wang, G. Geoff 3; Mao, Rong 1,2; Fang, Xiangmin 1; Wang, Huimin 4; Bu, Wensheng 1,2
刊名	FORESTS
	2019-02-01
卷号	10 期号:2 页码:16
关键词	experimental nitrogen addition understory plant growth plant nutrient nonstructural carbohydrates
ISSN号	1999-4907
DOI	10.3390/f10020155
通讯作者	Chen, Fusheng(chenfusheng@jxau.edu.cn)
英文摘要	Research Highlights: This study identifies the nitrogen (N) deposition effect on understory plants by altering directly soil nutrients or indirectly altering environmental factors in subtropical plantation. Background and Objectives: N deposition is a major environmental issue and has altered forest ecosystem components and their functions. The response of understory vegetation to N deposition is often neglected due to a small proportion of stand productivity. However, compared to overstory trees, understory species usually have a higher nutrient cycle rate and are more sensitive to environmental change, so should be of greater concern. Materials and Methods: The changes in plant biomass, N, phosphorus (P), and nonstructural carbohydrates (NSCs) of three dominant understory species, namely Dicranopteris dichotoma, Lophatherum gracile, and Melastoma dodecandrum, were determined following four years of experimental N addition (100 kg hm(-2) year(-1) of N) in a Chinese fir plantation. Results: N addition increased the tissue N concentrations of all the understory plants by increasing soil mineral N, while N addition decreased the aboveground biomass of D. dichotoma and L. gracile significantlyby 82.1% and 67.2%, respectively. The biomass of M. dodecandrum did not respond to N addition. In contrast, N addition significantly increased the average girth growth rates and litterfall productivity of overstory treesby 18.28% and 36.71%, respectively. NSCs, especially soluble sugar, representing immediate products of photosynthesis and main energy sources for plant growth, decreased after N addition in two of the three species. The plant NSC/N and NSC/P ratios showed decreasing tendencies, but the N/P ratio in aboveground tissue did not change with N addition. Conclusions: N addition might inhibit the growth of understory plants by decreasing the nonstructural carbohydrates and light availability indirectly rather than by changing nutrients and N/P stoichiometry directly, although species-specific responses to N deposition occurred in the Chinese fir plantation.
资助项目	National Natural Science Foundation of China[31730014] ; National Natural Science Foundation of China[31870427] ; Jiangxi Provincial Department of Science and Technology[20153BCB22008] ; Jiangxi Provincial Department of Science and Technology[20165BCB19006] ; Jiangxi Provincial Department of Science and Technology[20181ACH80006] ; 2011 Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, Jiangxi Agricultural University
WOS关键词	SIMULATED N DEPOSITION ; PHOSPHORUS ADDITIONS ; CNP STOICHIOMETRY ; BOTHRIOCHLOA-ISCHAEMUM ; TERRESTRIAL PLANTS ; HERBACEOUS LAYER ; LOESS PLATEAU ; GROWTH ; SOIL ; RESPONSES
WOS研究方向	Forestry
语种	英语
出版者	MDPI
WOS记录号	WOS:000460744000079
资助机构	National Natural Science Foundation of China ; Jiangxi Provincial Department of Science and Technology ; 2011 Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, Jiangxi Agricultural University
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49257]
专题	中国科学院地理科学与资源研究所
通讯作者	Chen, Fusheng
作者单位	1.Jiangxi Agr Univ, Jiangxi Prov Key Lab Silviculture, Nanchang 330045, Jiangxi, Peoples R China 2.Jiangxi Agr Univ, Key Lab Natl Forestry & Grassland Adm Forest Ecos, Jiulianshan Natl Observat & Res Stn Chinese Fores, Nanchang 330045, Jiangxi, Peoples R China 3.Clemson Univ, Dept Forestry & Environm Conservat, Clemson, SC 29634 USA 4.Chinese Acad Sci, Qianyanzhou Ecol Stn, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Wang, Fangchao,Chen, Fusheng,Wang, G. Geoff,et al. Effects of Experimental Nitrogen Addition on Nutrients and Nonstructural Carbohydrates of Dominant Understory Plants in a Chinese Fir Plantation[J]. FORESTS,2019,10(2):16.
APA	Wang, Fangchao.,Chen, Fusheng.,Wang, G. Geoff.,Mao, Rong.,Fang, Xiangmin.,...&Bu, Wensheng.(2019).Effects of Experimental Nitrogen Addition on Nutrients and Nonstructural Carbohydrates of Dominant Understory Plants in a Chinese Fir Plantation.FORESTS,10(2),16.
MLA	Wang, Fangchao,et al."Effects of Experimental Nitrogen Addition on Nutrients and Nonstructural Carbohydrates of Dominant Understory Plants in a Chinese Fir Plantation".FORESTS 10.2(2019):16.