简介:MethaneemissionfluxfromricepaddiesinGuizhouprovinceshowsobviousthreestagediurnalvariations;Itisrelativelylowfromthemorningtothenoon,thensuccessivelyincreasesintheafternoonandatnight,andfinallyfollowsagradualdecrease.Theδ13CvaluesoftracemethaneemittedfromricepaddiesinGuizhouProvincerangefrom-64.5‰to-54.1‰withanaverageof-60.7‰,veryclosetothereportedvaluesfromAmericaorKenya.