干旱区生态环境知识资源中心(Arid): 荒漠草原4种典型植物群落枯落物输入对土壤呼吸的影响

Arid

	荒漠草原4种典型植物群落枯落物输入对土壤呼吸的影响
其他题名	Effects of litter input of four typical plant communities on soil respiration in desert steppe
	李学斌 1; 陈林1 ; 吴秀玲 2; 张硕新 3; 谢应忠 1
来源期刊	北京林业大学学报
ISSN	1000-1522
出版年	2012
卷号	34 期号:5 页码:80-85
中文摘要	采用动态密闭气室分析法,对荒漠草原4种典型植物群落(蒙古冰草群落、赖草群落、甘草群落、沙蒿群落)土壤呼吸进行了测定,运用数理统计的方法得到了枯落物输入对土壤呼吸的贡献量及其与环境因子的关系。结果表明:土壤呼吸日变化呈"单峰"曲线,有枯落物输入的土壤呼吸速率显著高于无枯落物输入的土壤呼吸;4种群落枯落物对土壤呼吸CO2的贡献量依次为:甘草群落(0.095g/(m2·h))>蒙古冰草群落(0.083g/(m2·h))>赖草群落(0.076g/(m2·h))>沙蒿群落(0.041g/(m2·h)),枯落物呼吸日贡献量与地表温度呈线性正相关。枯落物呼吸贡献量的季节变化规律呈"双峰"曲线,2次峰值分别出现在7月与9月,9月枯落物呼吸贡献量最大,分别为0.13、0.14、0.12、0.12g/(m2·h);枯落物呼吸季节贡献量与土壤含水量呈线性相关,与土壤表层温度呈对数相关。
英文摘要	The dynamic closed chamber method, daily and seasonal respiration rates of litters and soil respiration rate before and after the input of litters were measured for four typical plant communities (Agropyron crisatum,Glycyrrhiza uralensis,Leymus secalinus and Artemisia desertorum) in desert steppe. Contribution of litters input to soil respiration and its relationship with environmental factors were obtained statistically. The results showed that the daily soil respiration rate displayed "single-peak " curve. The soil respiration rate with input of litters was higher than without. The rank of contribution of litters to soil respiration rate for four plant communities was G. uralensis(0. 095 g / (m 2 ·h)) > A. crisatum (0. 083 g/(m 2 ·h)) > L. secalinus(0. 076 g/(m 2 ·h)) > A. desertorum(0. 041 g/(m 2 ·h)). Contribution rate of litter inputting to soil respiration rate correlated positively with temperature on ground surface. The seasonal contribution rate of litters on soil respiration rate for four plant communities exhibited "doublepeak"curve with peak appearing in July and September and highest value recorded in September,i. e. 0. 13,0. 14,0. 12,0. 12 g / (m 2 ·h). The seasonal contribution rate of litters on soil respiration rate is positively related with soil water content and logarithmically with temperature on ground surface.
中文关键词	荒漠草原 ; 枯落物输入 ; 土壤呼吸
英文关键词	desert steppe litter input soil respiration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY ; PLANT SCIENCES ; AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Forestry ; Plant Sciences ; Agriculture
CSCD记录号	CSCD:4637630
来源机构	西北农林科技大学 ; 宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227708
作者单位	1.宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地; 2.宁夏农业勘查设计院; 3.西北农林科技大学林学院
推荐引用方式 GB/T 7714	李学斌,陈林,吴秀玲,等. 荒漠草原4种典型植物群落枯落物输入对土壤呼吸的影响[J]. 西北农林科技大学, 宁夏大学,2012,34(5):80-85.
APA	李学斌,陈林,吴秀玲,张硕新,&谢应忠.(2012).荒漠草原4种典型植物群落枯落物输入对土壤呼吸的影响.北京林业大学学报,34(5),80-85.
MLA	李学斌,et al."荒漠草原4种典型植物群落枯落物输入对土壤呼吸的影响".北京林业大学学报 34.5(2012):80-85.