张俊丽,张锦丽,赵晓进,廖允成,景小丽,薛菁.不同耕作方式下旱作玉米田土壤CO2排放量及其与土壤水热的关系[J].干旱地区农业研究,2018,36(4):88~93
不同耕作方式下旱作玉米田土壤CO2排放量及其与土壤水热的关系
Effects of different tillages on soil CO2 flux, and its relation to soil moisture and soil temperature in dry-land maize field
  
DOI：10.7606/j.issn.1000-7601.2018.04.13
中文关键词:  土壤CO2排放量  土壤温度  土壤水分  夏玉米  耕作方式
英文关键词:soil CO2 flux  soil temperature  soil moisture  summer maize  tillage system
基金项目:
作者单位
张俊丽 渭南市农业技术推广中心，陕西 渭南 714000武汉市东西湖区环境监测站，湖北 武汉 430000 
张锦丽 武汉市东西湖区环境监测站，湖北 武汉 430000 
赵晓进 渭南市农业技术推广中心，陕西 渭南 714000武汉市东西湖区环境监测站，湖北 武汉 430000 
廖允成 西北农林科技大学农学院，陕西 杨凌 712100 
景小丽 渭南市农业技术推广中心，陕西 渭南 714000武汉市东西湖区环境监测站，湖北 武汉 430000 
薛菁 渭南市农业技术推广中心，陕西 渭南 714000武汉市东西湖区环境监测站，湖北 武汉 430000 
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中文摘要:
      为探讨不同耕作方式对旱作玉米田土壤CO2排放量的影响，设置深松耕（DT）、翻耕（PT）和免耕（NT）3个处理，分析3种耕作方式下土壤CO2排放量的动态变化及其与土壤温度和土壤水分间的关系。结果显示：2010-2011年夏玉米生长季，3种耕作方式下土壤CO2排放量均呈先增后降的变化趋势，表现为DT>PT>NT，且不同处理间差异显著（P<0.05）；耕作方式可显著影响夏玉米生育前期土壤温度，且土壤CO2排放量对不同耕作方式下土壤温度的敏感性不同，土壤温度分别可以解释PT、DT和NT处理土壤CO2排放量季节变化的50.72%～53.90%、48.10%～59.63%和13.31%～19.90%；土壤水分和温度共同分别可以解释旱作夏玉米田DT和PT处理下土壤CO2排放量季节变化的57.61%～76.83%和56.62%～67.12%。土壤温度和水分是影响旱作农田DT和PT处理下土壤CO2排放量的关键因素。
英文摘要:
      An experiment was conducted to explore the effects of different tillages on soil CO2 flux, and its relation to soil moisture and soil temperature in dry-land maize field. Summer maize was planted using three different tillages, including deep tillage (DT), plow tillage (PT) and no tillage (NT). The results indicated that soil CO2 flux was first increased and then decreased in all 3 tillage systems during the whole maize growth period in 2010-2011, the miximum of soil CO2 flux was DT, follwed by PT, and NT, and there was significant difference between different treatments (P<0.05). The effect of tillage system on soil temperature are more significant at early stage than at later stage. There was difference in the temperature sensitivity of soil CO2 flux in different tillages, Soil temperature could explain 50.72%~53.90%, 48.10%~59.63% and 13.31%～19.90% seasonal variation of soil CO2 flux under PT, and DT and NT treatments. Soil temperature and soil moisture could explain 57.61%~76.83% and 56.62%~67.12% seasonal variations of soil CO2 flux under DT and PT treatments, indicating that soil temperature and soil moisture are the key factors affecting soil CO2 flux under DT and PT treatments in dry-land maize field.
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