| 1. | Study on the relation between paddy field temperature and methane emission flux
稻田温度与甲烷排放通量关系的研究 |
| 2. | Soil n2o discharge flux became higher than the checks due to mulch and planting wheat in the winter wheat growing stages
种小麦处理与不种小麦处理相比，土壤中n _ 2o排放通量明显较高。 |
| 3. | Soil was the most source of atmospheric n2o . the strength of soil n2o discharge flux and changes of the total n2o amount present in the atmosphere correlated well with the changes of soil properties
土壤是n _ 2o主要的发生源，土壤中n _ 2o排放通量的强度和大气中n _ 2o总量的变化与土壤性质的改变密切相关。 |
| 4. | 3 . soil n2o discharge flux of mulch was higher than that of no mulch treatment , and with the depth of 5 , 10 , 20cm the soil n2o discharge flux and the net adding flux increased in the order of depth in the upper soil layers
3地膜覆盖使5 ， 10 ， 20cm土层处n _ 2o的排放通量较未覆膜处理显著增加，且随着土层的加深，排放量依次增大，增加幅度也表现为下层大于上层。 |
| 5. | The changes of the three aspects have the cause - and - effect relationships : changes of soil moisture and temperature were affected directly by the farming practice , subsequently , the content of soil nitrate nitrogen was affected by the former changes , ultimately , the soil nitrate reductase ( nr ) and nitrite reductase ( nir ) activities were affected by the formers
由通径分析的路径系数比较，土壤含水量( 0 . 3604 )土壤温度( 0 . 3091 )硝态氮含量( 0 . 1212 ) ，并共同作用于土壤硝酸还原酶活性。 2冬小麦的不同生育期地膜覆盖的农作措施显著的增加了土壤中n _ 2o排放通量。 |
| 6. | Papers about methane and nitrous oxide were concerning in bare land soil and the effect factors up today . almost no information was on the nitrous oxide and methane fluxes from greenhouse soil and its microbiological mechanisms . therefore , it was valuable to observe the fluxes of methane and nitrous oxide from green - house soil and demonstrate its microbiological mechanisms
目前国内外关于农田甲烷和氧化亚氮排放通量的研究，仅局限于报道大田作物在当季生长期内甲烷和氧化亚氮的排放及其影响因子，但在设施栽培条件下土壤甲烷和氧化亚氮排放及其微生物学机理及相互间关系至今未见报道。 |
| 7. | However , under planting conditions , the content of nitrate nitrogen in 10 to 20cm soil layer and the ammonium nitrogen content in 5 to 10cm soil layer , the organic carbon content in 0 to 5cm soil layer were the most critical factors in mulch and no mulch treatment , respectively . 5
对覆膜种小麦处理， 10 - 20cm土层土壤的硝态氮含量对土壤中n _ 2o排放通量的影响最大；对无膜种小麦处理， 5 - 10cm土层土壤的nh _ 4 ~ + - n及0 - 5cm土层土壤中的有机质含量决定了土壤中n _ 2o的排放通量。 |
| 8. | This paper deals with the fluxes of nitrous oxide from green - house soil , the methane oxidation by the soil , and microbiological mechanisms . the results obtained were reported as the followings : 1 ) it showed that the flux of n2o from the greenhouse was much higher than that from the bare land
因此，研究农业设施栽培条件下，甲烷和氧化亚氮排放及其微生物学机理，既可明确甲烷和氧化亚氮的排放通量，又能提供有效控制甲烷和氧化亚氮排放的措施，为农业和环境的可持续发展提供科学依据。 |
| 9. | To offer the scientific bases for tracking the n2o sources and sinks processes well and reducing soil n2o discharge flux , effects of the farming practice of clear plastic film mulch on the changes of soil nao discharge flux in the winter wheat field in shannxi guanzhong area were studied by field and incubation experiments
在此前提下，本丈通过田间和室内模拟试验，研究了陕西关中地膜覆盖的农作措施对冬小麦田土壤中n _ 2o排放通量的影响，旨在为大气中n _ 2o源汇的探索研究和土壤中n _ 2o的农业减排措施的研究提供科学的依据。 |
| 10. | 4 . soil n2o discharge flux responsible for the different treatments were affected by the different soil factors in the winter wheat growing stages . under no planting conditions , the moisture regime in the 0 to 5cm soil layer mostly made the soil n2o discharge flux adding in the mulch treatment , and the content of nitrate nitrogen in 5 to 10cm soil layer in the no mulch treatment
4在冬小麦生育期内，影响不同处理土壤中n _ 2o排放通量的主要土壤因子为：无种植情况下，覆膜所导致的膜下( 0 - 5cm )土壤水分积累是引起土壤中n _ 2o排放通量增加的关键；无膜时较浅层土壤( 5 - 10cm )中no _ 3 ~ - - n浓度对土壤中n _ 2o的排放至关重要。 |
