This literary grace is tested with the static case law and the field

the wheat paddock CO2 flux of the variety changes the trends to study and apply fertilizer with various years.The result of study showed:(1) Catcher fertilization can increase soil CO2 emissions.With the appropriate amount of organic fertilizer with NPK fertilizer application for wheat root growth

root weight and increase root and coronal ratio

vigorous plant growth

photosynthesis increased

promoting root respiration rate and soil CO2 emissions.Different fertilization changes emissions of CO2 in the trend: middle concentration N treatments(N1PKM)>low concentration N treatments(N0PKM)>high concentration N treatments(N2PKM)>CK concentration N treatments(N0P0K0M).(2)Varieties succession of wheat in different years can affect the wheat field on CO2 emissions.Root dry weight

root and coronal ratio

biological yield and soil CO2 emissions were positively correlated.In other words

the recent(2000) varieties Shannong-11's root grow vigorous in late growing

so it is conductive to the grain carbohydrates in the transfer

thus grain yield high and CO2 emissions are large;Early(1950) on the Bima-1 in contrast

root is easy premature senility in late growing

yield low and CO2 emission is also very low.The trend is turning green in one and jointing stage: Yannong-15>Shannong-11>Bima-1

forming a vesicle for period: Shannong-11> Yannong-15> Bima-1.(3) Wheat growth exuberant period(jointing stage) is soil CO2 emissions in the biggest period.The trend is jointing stage> filling stage> turn green period.(4)Soil temperature and moisture affect the wheat fields of CO2 emissions.In the process of wheat growth up to the rising of the ground temperature and increase of the soil moisture

the wheat grows vigorously

the activation of the root system is strengthened

improved the release amount of wheat field CO2 at the same time.