摘要
采用土柱试验法,研究了温度、水分、盐分对土壤CO_2和O_2浓度的影响。结果表明:温度、水分与土壤CO_2和O_2浓度均呈二次方关系,盐分与土壤CO_2和O_2浓度呈现对数关系。温度与土壤CO_2浓度呈正相关关系,与土壤O_2浓度呈负相关关系;水分、盐分分别与土壤CO_2浓度呈负相关关系,与土壤O_2浓度呈正相关性,经检验以上关系均达到显著水平。采用通径分析方法研究表明,盐分和温度对土壤CO_2和O_2浓度的影响直接作用明显,水分对土壤CO_2和O_2浓度的影响间接作用明显。温度、水分和盐分的交互作用能够解释土壤CO_2和O_2浓度变化的78.66%和67.99%,说明还有其它影响因素有待于进一步研究。盐分和温度对土壤CO_2和O_2浓度变化的贡献较大,是主要的影响因子。因此,今后可通过灌溉调控土壤盐分和温度,为作物生长创造良好的根际生长环境,同时调控土壤CO_2的排放。
Effects of temperature,soil moisture and salinity on soil CO2 and O2 concentration were studied by soil column experiment. The results showed that the soil CO2 and O2 concentration were quadratic to temperature and soil moisture,and were logarithmic to soil salinity. The temperature had significant positive correlation with soil CO2 concentration,and showed a significant negative correlation with soil O2 concentration,while soil moisture and salinity had significant negative correlation with soil CO2 concentration,and showed a significant positive correlation with soil O2 concentration. Path analysis showed that the temperature and soil salinity had direct effects on soil CO2 and O2 concentration,while soil moisture mainly had indirect effects through their contributions to other factors. The interaction of temperature,soil moisture and salinity could explain 78. 66% and 67. 99% of soil CO2 and O2 concentration variability,respectively. It was indicated that other factors need to be further studied. Soil salinity and temperature as the main influence factors,and contributed greatly to the changes of soil CO2 and O2 concentration. Therefore,the reasonable control of soil salinity and temperature by irrigation in the future can create a good environment for crop growth and control the emission of soil CO2.
作者
刘芳婷
范文波
张金玺
董倩倩
李长晓
LIU Fangting;FAN Wenbo;ZHANG Jinxi;DONG Qianqian;LI Changxiao(College of Water ＆ Architectural Engineering,Shihezi University,Shihezi 832000,China)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2018年第10期154-159,共6页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金(51569028)资助
关键词
土壤
CO2
O2
温度
水分
盐分
soil
CO2
O2
temperature
soil moisture
soil salinity
