北京林业大学学报2012，Vol.34Issue(5)：80-85,6.
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
Effects of litter input of four typical plant communities on soil respiration in desert steppe
摘要
Abstract
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.关键词
荒漠草原/枯落物输入/土壤呼吸Key words
desert steppe/litter input/soil respiration分类
农业科技引用本文复制引用
李学斌,陈林,吴秀玲,张硕新,谢应忠..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].北京林业大学学报,2012,34(5):80-85,6.基金项目
国家自然科学基金项目（31140017）、宁夏自然科学基金项目（NZl017）、教育部西部访学计划项目（2009）、宁夏大学自然科学基金基目（NDZR10-63）. （）
