干旱区生态环境知识资源中心(Arid): 宁夏荒漠草原柠条锦鸡儿枯落物分解特征及其影响因素

Arid

	宁夏荒漠草原柠条锦鸡儿枯落物分解特征及其影响因素
其他题名	Litter decomposition rate of the Caragana korshinskii shrub : influencing factors in the desertified grassland ecosystems of Ningxia
	刘佳楠 1; 常海涛 1; 赵娟 1; 张安宁 1; 陈蔚 1; 张静 2; 罗雅曦 2; 刘任涛 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2019
卷号	39 期号:11 页码:4039-4048
中文摘要	以宁夏荒漠草原柠条锦鸡儿(Caragana kornshinskii)枯落物为研究对象,利用网孔分解袋法研究了极小型、小型、中型和大型柠条锦鸡儿灌丛微生境枯落物分解率变化特征及对土壤环境的响应规律.结果表明:(1)随着分解时间延长,不同大小柠条锦鸡儿灌丛微生境土壤含水量和土壤温度均呈现出相似的分布特征,而土壤pH值和电导率随时间分布特征则受到灌丛大小的显著影响.(2)3种网孔内,不同大小柠条灌丛微生境间枯落物分解率均无显著差异性.但是,灌丛微生境中枯落物分解率受到灌丛大小和网孔大小的共同影响.(3)中型灌丛微生境中枯落物分解率在3种网孔间均无显著差异性.但在极小型灌丛微生境中,120 d时枯落物分解率表现为4 mm(40.95%) >0.01 mm(38.51%)>2 mm(32.14%), 150 d时枯落物分解率表现为2 mm(37.64%)>4 mm(35.20%) >0.01 mm(26.68%).在小型灌丛微生境中,120 d时枯落物分解率表现为0.01 mm(46.81% )> 4 mm(41.07%)>2 mm(34.75%).在大型灌丛微生境中,120 d时枯落物分解率表现为4 mm(39.65%) >2 mm(36.65%) >0.01 mm(35.96%),210 d时枯落物分解率表现为2mm(48.05%)>4 mm(35.96%) >0.01 mm(30.80% ).(4) Olson衰减指数模型得出枯落物分解50%和95%所需时间,表现为极小型灌丛和中型灌丛微生境中均为0.95年和4.1年(3种网孔相同);小型灌丛微生境中为0.63年和2.74年(4 mm) 、1.90年和8.21年(2 mm) 、0.95年和4.1年(0.01 mm);大型灌丛微生境中为0.95年和4.1年(4 mm) 、0.63年和2.74年(2 mm) 、1.90年和8.21年(0.01 mm).研究表明,在宁夏荒漠草原,仅灌丛大小引起的微生境差异对枯落物分解率影响较小,但灌丛大小和土壤动物类群的相互作用对枯落物分解率的影响较大.
英文摘要	In Yanchi County, Ningxia, the decomposition rates of C. korshinskii litter and the associated soil environment were sampled in microhabitats beneath very small, small, medium, and large shrub canopy sizes. Our study found that (1) during the decomposition process,soil moisture content and soil temperature indicated similar distributions in the four types of shrub canopy size, however, soil pH and soil electrical conductivity changed significantly among the four types. (2) no significant differences within the three mesh sizes between the four types of shrub canopy size in the decomposition rate of shrub litter in the litter bag was found. (3) no significant differences in the litter decomposition rate of shrubs in the litter bag within the three mesh sizes in the medium shrub microhabitat was found. In the very small shrub microhabitat, the decomposition rate of shrub litter within the three mesh sizes were 4 mm (40.95%) >0.01 mm (38.51%) >2 mm (32.14%) at 120 d. However, it followed the order of the three mesh sizes of 2 mm (37.64%) >4 mm (35.20%) >0.01 mm (26.68%) at 150 d. In the small shrub microhabitat, the decomposition rate of shrub litter within the three mesh sizes followed the order of 0.01 mm (46.81%) >4 mm (41.07%) >2 mm (34.75%) at 120 d,whereas it was found to follow the order of the three mesh sizes, being 2 mm (37.64%) >4 mm (35.20%) >0.01 mm (26.68%) at 150 d. In the large shrub microhabitat, the decomposition rate of shrub litter within three mesh sizes was 4 mm (39.65%) >2 mm (36.65% ) >0.01 mm (35.96%) at 120 d. However, it was found to follow the order of the three mesh sizes, being 2 mm (48.05%) >4 mm (35.96%) >0.01 mm (30.80%) at 150 d. (4) according to the Olson index, it took 0.95 and 4.1 years for C. korshinskii litter within the three-size meshes to decompose at 50% and 95% respectively in the microhabitats of very small and medium shrub sizes. The litter in the small shrub microhabitats spent 0.63 a and 2.74 a (4 mm),1.90 a and 8.21 a (2 mm),and 0.95 a and 4.1 a (0.01 mm),of the large shrub size spent 0.95 a and 4.1 a (4 mm),0.63 a and 2.74 a (2 mm),and 1.90 a and 8.21 a (0.01 mm) with decomposition rates of 50% and 95%. It was concluded that differences in shrub canopy size microhabitats indicated little influence on litter decomposition rates. The results of this study suggest that the interaction between shrub size and soil faunal groups influences the litter decomposition process in the desert grassland ecosystems of Ningxia.
中文关键词	荒漠草原 ; 柠条锦鸡儿 ; 灌丛大小 ; 枯落物 ; 分解率 ; 网孔分解袋
英文关键词	desertified grassland ecosystem Caragana korshinskii shrub size litter decomposition rate litter bag of different mesh
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6512945
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239446
作者单位	1.宁夏大学, 西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国; 2.宁夏大学农学院, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	刘佳楠,常海涛,赵娟,等. 宁夏荒漠草原柠条锦鸡儿枯落物分解特征及其影响因素[J]. 宁夏大学,2019,39(11):4039-4048.
APA	刘佳楠.,常海涛.,赵娟.,张安宁.,陈蔚.,...&刘任涛.(2019).宁夏荒漠草原柠条锦鸡儿枯落物分解特征及其影响因素.生态学报,39(11),4039-4048.
MLA	刘佳楠,et al."宁夏荒漠草原柠条锦鸡儿枯落物分解特征及其影响因素".生态学报 39.11(2019):4039-4048.