干旱区生态环境知识资源中心(Arid): 鄱阳湖沙化土地植物-凋落物-土壤化学计量特征

Arid

	鄱阳湖沙化土地植物-凋落物-土壤化学计量特征
其他题名	Stoichiometric characteristics of plants,litter and soils in desertification area of Poyang Lake
	陆远鸿 1; 曹昀 2; 许令明 1; 张英 1; 郑林 2; 胡启武 2
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2019
卷号	38 期号:2 页码:329-335
中文摘要	探明鄱阳湖沙化区植被恢复后植物、凋落物与土壤碳( C) 、氮( N) 、磷( P)化学计量特征,对我国亚热带地区沙化土地的生态恢复与重建具有重要意义.在江西省都昌县典型沙化区建立110 hm~2沙化土地恢复试验区,采集狗牙根( Cynodon dactylon) 、香根草( Vetiveria zizanioides) 、单叶蔓荆( Vitex rotundifolia) 、算盘子( Glochidion puberum) 、湿地松( Pinus elliottii) 5种优势植物的新鲜叶片、凋落物及林下表层0 ~ 10 cm土壤样品,测定有机C、全N、全P含量.结果表明:( 1) 5种植物叶片C、N、P含量平均为394.3、11.9、1.2 mg·g~(-1);凋落物C、N、P含量平均为366.7、6.8、0.9 mg·g~(-1);表层土壤C、N、P含量平均为6.8、0.4、0.5 mg·g~(-1);叶片养分含量显著高于凋落物和土壤.( 2)叶片与土壤C、P含量和C ∶ P显著相关( P<0.05);凋落物C、N、P含量与叶片C、N、P含量及化学计量比呈极显著相关( P < 0.01), 与土壤C、N、P含量及C ∶ P显著相关( P<0.05).( 3)鄱阳湖沙地植物C、N、P含量低于全国平均水平.轻度沙化区14
英文摘要	Clarifying the C ∶ N ∶ P stoichiometry of plant-litter-soil continuum after vegetation restoration in desertification area of Poyang Lake has great significance for ecological restoration and reconstruction of desertification land in subtropical regions of China. We established a restored ecosystem with an area of 110 hm~2 in a typical desertification area of Duchang,Jiangxi Province. We collected 0-10 cm soil samples,fresh leaves,and litters of five dominant species, including Cynodon dactylon,Vetiveria zizanioides,Vitex rotundifolia,Glochidion wilsonii,and Pinus elliottii. We measured C,N,and P concentrations in all samples. The results showed that:( 1) The average concentrations of C,N,P in leaves of five species were 394.3,11.9 and 1.2 mg·g~(-1),366.7,6.8 and 0.9 mg·g~(-1) in litters and 6.8,0.4 and 0.5 mg·g~(-1) in soils. The concentrations of elements in leaves were significantly higher than those in litters and soils.( 2) Significant correlations of C and P concentrations and C ∶ P were found between leaf and soil( P< 0.05). C,N,P concentrations in litters were significantly correlated with C,N,P concentrations and stoichiometric ratios in leaves( P<0.01), and significantly correlated with C,N,P concentrations and C ∶ P in soils( P<0.05).( 3) C,N,P concentrations of plants in Poyang Lake desertification land were lower than national mean values of China. Leaf N ∶ P was 14-16 in mild desertification area,and <14 in moderate and heavy desertification area. According to nutrient limitation theory,plant growth in this area was co-limited by N and P,and with relatively much stronger limitation of N.
中文关键词	鄱阳湖沙地 ; 植物 ; 凋落物 ; 土壤 ; 化学计量
英文关键词	Poyang Lake desertification area plant litter soil stoichiometry
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6419452
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239472
作者单位	1.江西师范大学地理与环境学院, 南昌, 江西 330022, 中国; 2.江西师范大学地理与环境学院;;鄱阳湖湿地与流域研究教育部重点实验室, ;;鄱阳湖湿地与流域研究教育部重点实验室, 南昌;;南昌, ;; 330022;;330022
推荐引用方式 GB/T 7714	陆远鸿,曹昀,许令明,等. 鄱阳湖沙化土地植物-凋落物-土壤化学计量特征[J],2019,38(2):329-335.
APA	陆远鸿,曹昀,许令明,张英,郑林,&胡启武.(2019).鄱阳湖沙化土地植物-凋落物-土壤化学计量特征.生态学杂志,38(2),329-335.
MLA	陆远鸿,et al."鄱阳湖沙化土地植物-凋落物-土壤化学计量特征".生态学杂志 38.2(2019):329-335.