土壤与作物
土壤與作物
토양여작물
Soil and Crop
2015年
1期
19-26
,共8页
大气 CO2%光合碳%微生物群落结构%碳循环%土壤有机质
大氣 CO2%光閤碳%微生物群落結構%碳循環%土壤有機質
대기 CO2%광합탄%미생물군락결구%탄순배%토양유궤질
atmospheric CO 2%photosynthetic carbon%microbial community and function%carbon cycle%soil organic matter
大气CO2浓度的升高通过植物－土壤－微生物的相互作用对陆地生态系统中最大碳库土壤的稳定性产生重要影响。大气CO2浓度升高，影响许多植物生长发育过程，进而影响土壤有机碳输入量。与此同时，土壤微生物的群落与功能也会随之发生变化，参与土壤碳的转化，深刻影响陆地生态系统的碳循环。文章分析了大气CO2浓度升高影响农田土壤碳循的有关过程，包括高 CO2浓度条件下，作物地下部分的生长响应，以及向土壤中输入作物光合有机物量和质的变化，探讨了土壤碳库对大气CO2浓度升高反馈的土壤微生物作用机制，进一步解析了土壤微生物群落结构在土壤碳与大气CO2浓度之间的相互作用，提出研究土壤有机碳转化的土壤微生物作用机制是预测全球气候变化条件下的农田土壤碳循环规律的关键。图1，参79。
大氣CO2濃度的升高通過植物－土壤－微生物的相互作用對陸地生態繫統中最大碳庫土壤的穩定性產生重要影響。大氣CO2濃度升高，影響許多植物生長髮育過程，進而影響土壤有機碳輸入量。與此同時，土壤微生物的群落與功能也會隨之髮生變化，參與土壤碳的轉化，深刻影響陸地生態繫統的碳循環。文章分析瞭大氣CO2濃度升高影響農田土壤碳循的有關過程，包括高 CO2濃度條件下，作物地下部分的生長響應，以及嚮土壤中輸入作物光閤有機物量和質的變化，探討瞭土壤碳庫對大氣CO2濃度升高反饋的土壤微生物作用機製，進一步解析瞭土壤微生物群落結構在土壤碳與大氣CO2濃度之間的相互作用，提齣研究土壤有機碳轉化的土壤微生物作用機製是預測全毬氣候變化條件下的農田土壤碳循環規律的關鍵。圖1，參79。
대기CO2농도적승고통과식물－토양－미생물적상호작용대륙지생태계통중최대탄고토양적은정성산생중요영향。대기CO2농도승고，영향허다식물생장발육과정，진이영향토양유궤탄수입량。여차동시，토양미생물적군락여공능야회수지발생변화，삼여토양탄적전화，심각영향륙지생태계통적탄순배。문장분석료대기CO2농도승고영향농전토양탄순적유관과정，포괄고 CO2농도조건하，작물지하부분적생장향응，이급향토양중수입작물광합유궤물량화질적변화，탐토료토양탄고대대기CO2농도승고반궤적토양미생물작용궤제，진일보해석료토양미생물군락결구재토양탄여대기CO2농도지간적상호작용，제출연구토양유궤탄전화적토양미생물작용궤제시예측전구기후변화조건하적농전토양탄순배규률적관건。도1，삼79。
Soil is the largest carbon (C) pool in terrestrial ecosystems.Elevated atmospheric CO2(eCO2) influences the stability of this C pool via the plant-soil-microbe interaction.Many plant species exhibit significant increase of growth in response to eCO 2 ,which is likely to alter organic carbon input to the soil.The community structure and function of soil microorganisms may also change under eCO 2 and probably have substantial influence on carbon cycling in terrestrial ecosystems as these microorganisms are subjected to be involved in the transformation of soil carbon.This paper summarized the effect of eCO 2 on soil carbon cycle,which included the root growth of crops in response to eCO 2 ,and quantitative and qualitative alternations on the photosynthates input to the soil under eCO 2.The feedback mechanisms of soil carbon pool in response to eCO 2 were also addressed in the perspective of soil microorganisms.It is proposed that the soil microbial community should be further investigated in order to better understand the relationship between soil carbon and atmos -pheric CO2.Thus,the mechanism of soil microorganisms being involved in the turnover of soil organ carbon is essential to clarify the pattern of carbon cycling in arable soils under global climate change.
