欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
利用DNDC（DeNitrificationDeComposition）模型，估算了由太湖地区1：50000土壤数据库转换集成的1km、2km、4km、8km、16km、32km和64km七种栅格粒度下1982～2000年共19年的稻田CH。的排放总量，研究了稻田CH。排放总量随栅格粒度增加的变化特征。结果表明，太湖地区稻田19年的CH4排放总量在16km栅格粒度处有明显的转折点，表现为在1km至16km栅格粒度之间，稻田CH4排放总量的极差仅为0．27TgC，模拟结果变异很小；而在16km至32km和64km栅格粒度之间，由较大的栅格单元所引起的面积误差导致了稻田CH4排放总量的极差达到2．96TgC，模拟结果迅速增大。因此，综合考虑空间数据量和模型运算周期，基于1：50000土壤数据库转换集成栅格数据模拟估算农田温室气体排放时，16km栅格粒度是最适宜的模拟粒度。
英文摘要：
With the aid of the DeNitrification - DeComposition （DNDC） model,the total CH4 emission from of paddy fields in the period from 1982 to 2000 in the Taihu Lake region, as was affected by grid size, was estimated and variation of the total emission with grid size characterized A total of 7 grid sizes,i, e. 1 km,2 km,4 kin,8 km,t6 km,32 km and 64 km, were designed, based on the 1 ： 50 000 soil database. Results showed that an apparent turning point was observed with the grid size of 16 km,and displayed as a limited range of the estimation of the total CH4 emission being only 0.27 Tg C and low variation of the simulation of grid sizes from 1 km to 16 km. However, the range of the estimation expanded to 2.96 Tg C due to errors in area calculation in grid sizes from 16 km to 64 kin,and the variation increased rapidly. Taking into account the amount of spatial data and computing cycle of the model, 16 km was the optimal grid size for estimating emission of greenhouse gas from the farmlands.
同期刊论文项目
同项目期刊论文
Phosphorus enhances Al resistance in Al-resistant Lespedeza bicolor but not in Al-sensitive L. cunea
Hexachlorobenzene dechlorination as affected by organic fertilizer and urea applications in two rice
Enhanced removal of polychlorinated biphenyls from alfalfa rhizosphere soil i a field study: the imp
Influence of arbuscular mycorrhiza and rhizobium on phytoremediation by alfalfa of an agricultural s
Ammonium under solution culture alleviates aluminum toxicity in rice and reduces aluminum accumulati
Effects of soil moisture, temperature, and nitrogen fertilization on soil respiration and nitrous ox
Landscape analysis of dynamic soil erosion in subtropical China : a case study in Xingguo County , J
Methane and nitrous oxide emissions from rice paddy soil as influenced by timing of application of h
Global estimations of the inventory and mitigation potential of methane emissions from rice cultivat
Quantifying methane emissions from rice fields in Taihu Lake region, China by coupling detailed soil
Organochlorine Pesticides (OCPs) in Soils under different land usage in the Taihu Lake Region, P. R.
Short-term effects of wheat straw incorporation into paddy field as affected by rice transplanting t
Root phosphate exudation and pH shift in the rhizosphere are not responsible for aluminum resistance
Uncertainty assessment of mapping mercury contaminated soils of a rapidly industrializing city in th
期刊信息
位置：