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《Journal of Arid Land Resources and Environment》 2018-12
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Characteristics and influencing factors of soil CH_4 and CO_2 emissions under different tillage measures

LV Jinhui;WU Jun;ZHANG Jun;WANG Yongbin;ZHANG Renzhi;College of Resources and Environmental Sciences,Gansu Agricultural University;Gansu Provincial Key Laboratory of Arid Land Crop Science,Gansu Agricultural University;Gansu Engineering Research Center for Agriculture Water-saving;  
The static chamber/gas chromatograph techniques and LI-8100A portable CO_2analyzer were applied to observe continuously the emission flux of greenhouse gases emission from soils under the different tillage measures from the very start of 2017 to October.The results showed that,the soils with different tillage measures were the CH_4sink.The fluctuation range of the absorbed flux was 0.010-0.080mg·m~(-2)·h~(-1).The soils with different tillage measures were the source of CO_2emission;the fluctuation range of the the emission flux was 0.04-0.27μmol·m~(-2)·s~(-1).The soil CH_4absorbtion flux was significantly and positively correlated with soil water content and significantly negatively correlated with soil temperature.CO_2emission flux was significantly negatively correlated with soil water content and significantly and positively correlated with soil temperature.The traditional tillage got the maximum annual CO_2and CH_4comprehensive GWP among all the measures as 1586.24kg(CO_2)·hm~(-2).The integrated GWP ranking of each treatment is:TTSNTSNT.But there was no significant difference between NT and NTS.Therefore,no-till treatment had the greenhouse gas reduction effect.
【Fund】: 国家自然科学基金项目(31571594 41661049);; “十二·五”《循环农业科技工程》项目(2012BAD14B03);; 甘肃省干旱生境作物学重点实验室-省部共建国家重点实验室培育基地开放基金课题(GSCS-2012-13);; 甘肃省自然科学基金项目(1606RJZA076)资助
【CateGory Index】: S154.1
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