干旱区地理2017，Vol.40Issue(3)：598-605,8.
黑河下游五种不同植被类型土壤呼吸的差异性解析
Analytic differences on soil respiration of various vegetation types in the lower reaches of Heihe River Basin
摘要
Abstract
Slight changes in soil respiration can have significant impacts on atmospheric CO2 concentrations,especially in extreme arid regions.In this paper,the soil respiration of different vegetation cover types,including forest (Populus euphratica),shrub (Tamarix chinensis),mixed forest (Populus euphratica mixed with Tamarix chinensis),farmland and bare soil were measured at Sidaoqiao,Ejin County,Inner Mongolia,China in lower reaches of Heihe River during the summer of 2014.Results indicated that soil respiration rate for the five different vegetation types were descending ordered:Mixed forest＞ T.chinensis＞Farmland＞P.euphratica ＞ Bare land.The soil temperature and soil moisture at 5 cm changed insignificantly.soil moisture ranging from 13％ to 61％ with soil temperature varying from 22 to 35 ℃ (there was a rain during the experiment period).The linear relationships between soil respiration and environmental factors including soil temperature,soil moisture,surface temperature,air temperature and air humidity of five different types vegetation were explored.It was found that there was no significant correlation (P ＞ 0.05) between the four environmental factors.Besides,the effects of hydrothermal factors on soil respiration were with high uncertainty.The results could provide scientific support and basic data for the study of the changes of soil respiration and carbon cycle in desert riparian forest.In the furure,we need to deeply analyze the impact mechanism of hydrothermal factors on soil respiration in the extreme arid area.关键词
黑河下游/植被类型/土壤呼吸Key words
the lower reaches of Heihe River/the vegetation type/soil respiration分类
农业科技引用本文复制引用
任志国,马明国,宋怡..黑河下游五种不同植被类型土壤呼吸的差异性解析[J].干旱区地理,2017,40(3):598-605,8.基金项目
国家自然科学基金青年基金项目(41201372) （41201372）
西北研究院青年人才成长基金项目(51Y551D91) （51Y551D91）
