干旱区生态环境知识资源中心(Arid): 鄱阳湖沙化土地湿地松人工林碳蓄积量研究

Arid

	鄱阳湖沙化土地湿地松人工林碳蓄积量研究
其他题名	Study on Carbon Storage of Pinus elliottii Artificially Forests in Sandy Desertification of Poyang Lake
	曹昀 1; 杨杰 2; 朱悦 2; 王秀文 2
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2016
卷号	25 期号:1 页码:15-21
中文摘要	2008─2010年在鄱阳湖建立了110 hm~2鄱阳湖沙化土地生态恢复示范区,采用野外调查和室内分析相结合的方法,测定了多宝乡沙山生态恢复示范区内不同沙化程度(重度、中度、轻度)湿地松(Pinus elliottii)人工林碳含量和碳蓄积量,分析碳蓄积量的空间分布及原因。结果表明:随着沙化程度的加大,林分密度减小,碳蓄积量也减小,表现为轻度沙化区>中度沙化区>重度沙化区,其中,(1)乔木层重度、中度和轻度沙化区地上部分碳蓄积量分别为:1.88、3.45、19.22 t·hm~(-2),碳蓄积量在各器官中的分布呈树干>树枝>树叶;(2)土壤层重度、中度和轻度沙化区碳蓄积量分别为0.59、0.9、1.3 t·hm~(-2),碳蓄积量主要集中在表层0~10 cm土层中,随土层深度的加深,土壤碳含量和土壤碳密度呈不断递减趋势,但轻度沙化区,却呈现表层土壤>深层土壤>中层土壤的趋势;(3)凋落物层重度、中度和轻度沙化区碳蓄积量分别为0.12、0.59、1.22 t·hm~(-2);(4)林下植被层碳含量明显低于乔木层,范围在365.8~475.9 mg·g~(-1)之间,不同沙化程度(以单叶蔓荆为例,重度、中度、轻度沙化区碳含量依次为446.3、441.1、469.8 mg·g~(-1))和不同物种之间差异不大(重度沙化区单叶蔓荆和狗牙根碳含量依次为446.3、416.5 mg·g~(-1))。可见生态条件较好的轻度沙化区植被更容易恢复成功,生态系统的固碳能力更强、效益更好。高密度的单一植物群落抑制林下植被的存活与扩展,因此沙化土地生态治理应该由易(轻度沙化区)到难(重度沙化区)依次进行,同时在先锋物种湿地松定居后要适时引入其他草本或阔叶植物物种,完善植物群落结构,增加沙化土地恢复区人工林的碳蓄积量。
英文摘要	This paper investigated the ecological restoration of desertification land in Poyang Lake area through field survey and laboratory analyses. The goals are to (1) measure the carbon content and carbon storage of the planted Pinus elliottii forests in severe, moderate, and mild desertification areas; (2) investigate the spatial distribution of carbon storage, and (3) analyze its causes. From 2008 to 2010, 110 hm~2 ecological restoration area for desertification land was established at Poyang Lake Area, which provides access to the detailed data.The results showed that: in the desertification control engineering the spatial distribution of carbon stock of Pinus elliottii plantation ecology system were:mild desertification area > medium desertification area > severe desertification area. (1) The aboveground carbon storage of the tree layer in severe, moderate and mild desertification areas were: 1.88, 3.45, 19.22 t·hm~(-2), the order of each component carbon storage in mild and moderate was trunk > branch > tree leaves; (2) The carbon storage of the soil layer in severe, moderate and mild desertification areas were 0.59, 0.9, 1.3 t·hm~(-2), the carbon accumulated mainly in the surface layer for 0-10cm, with the soil layer deeper, the soil carbon and soil carbon density was diminishing, but in mild desertification area, the tendency shows that surface layer > deep soil > middle soil; (3) The carbon storage of the litter layer in severe, moderate and mild desertification areas were 0.12, 0.59, 1.22 t·hm~(-2); (4) The carbon content of undergrowth layer are significantly lower than tree layer, there are little difference in the carbon content of undergrowth layer in different desertification degree and different species. The mild desertification area, where has a better ecological environment with a greater carbon sequestration capacity, is more suitable for vegetation restoration. The high-density simple community structure makes the survival and expansion of understory vegetation more difficult. The land desertification control should start from easy to difficult (from mild desertification area to severe desertification area). After the pioneer species (Pinus elliottii) get settled,other herbaceous and broad-leaved vegetation species should be timely introduced so as to improve community structure and enhance the carbon storage of the desertification areas planted forest.
中文关键词	鄱阳湖 ; 沙化土地 ; 湿地松 ; 植被恢复 ; 碳蓄积
英文关键词	Poyang Lake sand desertification Pinus elliottii vegetation restoration carbon storage
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES ; ENVIRONMENTAL SCIENCES
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
CSCD记录号	CSCD:5647274
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234710
作者单位	1.江西师范大学, 鄱阳湖湿地与流域研究教育部重点实验室, 南昌, 江西 330022, 中国; 2.江西师范大学地理与环境学院, 南昌, 江西 330022, 中国
推荐引用方式 GB/T 7714	曹昀,杨杰,朱悦,等. 鄱阳湖沙化土地湿地松人工林碳蓄积量研究[J],2016,25(1):15-21.
APA	曹昀,杨杰,朱悦,&王秀文.(2016).鄱阳湖沙化土地湿地松人工林碳蓄积量研究.生态环境学报,25(1),15-21.
MLA	曹昀,et al."鄱阳湖沙化土地湿地松人工林碳蓄积量研究".生态环境学报 25.1(2016):15-21.