干旱区生态环境知识资源中心(Arid): 极端干旱区花花柴(Karelinia caspia)和胡杨(Populus euphratica)叶凋落物分解和养分释放特征

Arid

	极端干旱区花花柴(Karelinia caspia)和胡杨(Populus euphratica)叶凋落物分解和养分释放特征
其他题名	Decomposition and nutrient release characteristics of Karelinia caspia and Populus euphratica leaf litters in extreme arid regions
	范琳杰; 李向义; 李成道; 林丽莎; 薛伟
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2021
卷号	38 期号:2 页码:1001-4675
中文摘要	为研究凋落物在极端干旱区的分解规律,利用凋落物分解袋法,以塔克拉玛干沙漠南缘策勒绿洲地区优势物种花花柴(Karelinia caspia)和胡杨(Populus euphratica)叶凋落物为研究对象,模拟自然状态,分别在3种生境下:土壤表层0 cm、土壤埋深2 cm、悬挂1 m进行凋落物分解试验,探究不同分解位置下的凋落物质量分解和碳(C)、氮(N)元素含量释放特征。结果表明:不同植物的质量损失率在不同分解位置处理下均存在显著差异,土壤表层0 cm处理下凋落物质量损失显著高于悬挂1 m和土壤埋深2 cm。至凋落物分解试验结束,花花柴质量损失率依次为:土壤表层0 cm(19.91%)>悬挂1 m(15.99%)>土壤埋深2 cm(12.35%)。胡杨质量损失率依次为:土壤表层0 cm(24.15%)>悬挂1 m(13.44%)>土壤埋深2 cm(8.72%)。在整个分解过程中,两种植物叶凋落物N含量呈富集现象,C含量呈释放状态。在不同分解位置下,N元素富集量和C元素量损失差异显著,土壤表层和土壤埋深2 cm凋落物N元素富集量均小于悬挂1 m凋落物,C元素损失量均大于悬挂1 m凋落物。Olson指数衰减模型对凋落物质量残留率进行拟合,两种植物的分解常数k值大小排序均为:土壤表层0 cm>悬挂1 m>土壤埋深2 cm。凋落叶质量残留率多因素方差分析表明在不同分解时间和不同分解位置对凋落物质量残留率影响显著(P<0.01)。在极端干旱区,掩埋条件不是驱动凋落物分解的主要因素,影响凋落物分解的因素主要是光降解。
英文摘要	In arid regions, strong solar radiation and photodegradation or physical degradation accelerate the rate of litter decomposition. However, research on the decomposition of litter in extreme arid regions remains limited. In this study, we investigated the litter decomposition rate of plant species in extreme arid regions using the litter bag method. Karelinia caspia and Populus euphratica are two dominant species in Cele Oasis located at the southern margin of the Taklimakan Desert. Litter decomposition tests of K. caspia and P. euphratica were carried out in three habitats (aboveground, 2 cm belowground and hanging 1 m) to explore the mass decomposition of litters and the release of carbon (C) and nitrogen (N) from the litters in each habitat. The mass decomposition rates of K. caspia and P. euphratica showed significant differences at different depths; the mass loss of aboveground (0 cm) litter was significantly higher than that of 1 m hanging and 2 cm belowground litters. At the end of the litter decomposition test, the mass loss of K. caspia and P. euphratica wood was in the order: aboveground (19.91%) > 1 m hanging (15.99%) > 2 cm belowground (12.35%) and aboveground (24.15%) > 1 m hanging (13.44%) > 2 cm belowground (8.72%), respectively. During the entire decomposition process, the N content of litters of both plant species increased, whereas the C content decreased. At different decomposition positions, the enrichment of N and the loss of C varied significantly. The enrichment of N in aboveground and belowground litters was lower than that of hanging litters, whereas the loss of C from above-and belowground litters was greater than that from hanging litters. Olsons exponential attenuation model was used to fit the mass residual rate of litters. The order of the decomposition constant (k) of the two plant species was in the order: aboveground > hanging > belowground. Additionally, multivariate analysis of the variance of mass residual rate of litters showed that both decomposition time and decomposition position had significant effects on the mass residual rate of litters (P<0.01). Overall, this study shows that in extreme arid regions, litter decomposition is mainly driven by photodegradation, not by the location of litter burial.
中文关键词	凋落物分解 ; 质量损失 ; 极端干旱 ; 养分释放
英文关键词	litters decomposition mass loss extreme drought nutrient release
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6951311
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354285
作者单位	范琳杰, 中国科学院新疆生态与地理研究所;;中国科学院新疆生态与地理研究所;;新疆策勒荒漠草地生态系统国家野外科学观测实验站;;中国科学院大学, 新疆荒漠植物根系生态与植被修复重点实验室;;荒漠与绿洲生态国家重点实验室;;新疆策勒荒漠草地生态系统国家野外科学观测实验站;;, 乌鲁木齐;;乌鲁木齐;;策勒;;, 新疆;;新疆;;新疆;;北京 830011;;830011;;848300;;100049, 中国.; 李向义, 中国科学院新疆生态与地理研究所;;新疆策勒荒漠草地生态系统国家野外科学观测实验站, 新疆荒漠植物根系生态与植被修复重点实验室;;新疆策勒荒漠草地生态系统国家野外科学观测实验站, 乌鲁木齐;;策勒, 新疆;;新疆 830011;;848300, 中国.; 李成道, 中国科学院新疆生态与地理研究所;;中国科学院新疆生态与地理研究所;;中国科学院大学, 新疆荒漠植物根系生态与植被修复重点实验室;;荒漠与绿洲生态国家重点实验室;;, 乌鲁木齐;;乌鲁木齐;;, 新疆;;新疆;;北京 830011;;830011;;100049, 中国.; 林丽莎, 中国科学院新疆生态与地理研究所;;中国科学院新疆生态与地理研究所;;新疆策勒荒漠草地生态系统国家野外科学观测实验站, 新疆荒漠植物根系生态与植被修复重点实验室;;荒漠与绿洲生态国家重点实验室;;新疆策勒荒漠草地生态系统国家野外科学观测实验站, 乌鲁木齐;;乌鲁木齐;;策勒, 新疆;;新疆;;新疆 830011;;830011;;848300, 中国.; 薛伟, 兰州大学, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	范琳杰,李向义,李成道,等. 极端干旱区花花柴(Karelinia caspia)和胡杨(Populus euphratica)叶凋落物分解和养分释放特征[J]. 兰州大学,2021,38(2):1001-4675.
APA	范琳杰,李向义,李成道,林丽莎,&薛伟.(2021).极端干旱区花花柴(Karelinia caspia)和胡杨(Populus euphratica)叶凋落物分解和养分释放特征.干旱区研究,38(2),1001-4675.
MLA	范琳杰,et al."极端干旱区花花柴(Karelinia caspia)和胡杨(Populus euphratica)叶凋落物分解和养分释放特征".干旱区研究 38.2(2021):1001-4675.