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地理科学 >

2011 , Vol. 31 >Issue 2: 190 - 196

DOI: https://doi.org/10.13249/j.cnki.sgs.2011.02.190

论文

干旱区不同土地利用方式下土壤呼吸日变化差异及影响因素

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  • 中国科学院新疆生态与地理研究所, 中国科学院绿洲生态与荒漠环境重点实验室, 新疆 乌鲁木齐 830011

收稿日期: 2010-03-31

  修回日期: 2010-06-08

  网络出版日期: 2011-02-20

基金资助

国家自然科学基金(40901061,40871059, 40901105)、西部之光项目(XBBS200810)资助。

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Soil Respiration Variant and Its Effecting Factors at Different Land Use in Arid Land

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  • Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China

Received date: 2010-03-31

  Revised date: 2010-06-08

  Online published: 2011-02-20

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摘要

利用开路式土壤碳通量测量系统-LI-8100对塔里木河下游6种土地利用方式下土壤呼吸速率的日变化进行了野外定位测量,并就水热因子及土壤理化性质对土壤日呼吸速率差异的影响进行了分析。结果表明,梨园、弃耕地、棉田、人工林、草地和天然林土壤呼吸速率日变化均呈单峰曲线,土壤日呼吸速率差异显著。大气温度和土地利用方式是造成土壤日呼吸差异的主要因素,其中土地利用方式通过改变地表温度、土壤水分、电导率、pH、盐分含量及机械组成等影响土壤日呼吸速率。

本文引用格式

周洪华, 李卫红, 杨余辉, 曹志超, 李稚 . 干旱区不同土地利用方式下土壤呼吸日变化差异及影响因素[J]. 地理科学, 2011 , 31(2) : 190 -196 . DOI: 10.13249/j.cnki.sgs.2011.02.190

Abstract

Soil respiration rates at 6 different land-use (i.e., cropland, orchard, abandoned farmlands, plantation, natural forest and grassland) in the lower reaches of the Tarim River were measured with an automated CO2 efflux system (LI-COR 8100), and the temperature, soil moisture, pH, salt content, organic content, total nitrogen content, available nitrogen content and soil texture were measured at the same time.The results showed that the diurnal variation of soil respiration rate of cropland, orchard, abandoned farmlands, plantation, natural forest and grassland, showed a single-peaked curve, were significant differences.The air temperature and land use types were main factors affected the differences of diurnal variation of soil respiration rate, in which the land use types changed the diurnal soil respiration through changing the soil properties including soil temperature, moisture, pH, salt content and texture.

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