| Cite this article: | 马晨光,蔡焕杰,卢亚军.基于APSIM模型不同水氮处理下N2O的排放研究[J].灌溉排水学报,0,():-. |
| machenguang,caihuanjie,luyajun.基于APSIM模型不同水氮处理下N2O的排放研究[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 1862Times Download 0Times |
|
|
|
| DOI： |
|
| Research on N2O emission from farmland under different water and nitrogen treatment based on APSIM model |
|
machenguang, caihuanjie, luyajun
|
|
North West Agriculture and Forestry University
|
| Abstract: |
| 【Objective】 Field experiments were conducted to study the effect of deficit irrigation on N2O emissions and yield from soils of winter wheat –summer maize fields and optimize irrigation and nitrogen application management measures in the GuanZhong Plain of China . 【Method】Through field experiments in October 2016 and October 2018, the characteristics of crop yield, soil moisture and N2O emissions under different deficit irrigation treatments were obtained; and the obtained data was used to adjust the parameters of the Agricultural Production Systems Simulator (APSIM) .The verified APSIM model was used to simulate the variation characteristics of crop yield, N2O emission, water use efficiency and N2O gas emission intensity under different nitrogen levels N50(50kg/hm2)、N100(100kg/hm2)、N150(150kg/hm2)、N200(200kg/hm2)、N250(250kg/hm2)、N300(300kg/hm2)and different water treatments CK(full irrigation),T1(Severe water deficit at seedling stage and Jointing stage),T2(Severe water deficit at seedling stage and medium water deficit at jointing stage),T3(Severe water deficit at seedling stage and medium water deficit at grain filling stage),T4(Medium water deficit at seedling stage and jointing stage),T5(Medium water deficit at seedling stage and grain filling stage). 【Result】The parameter verification results show that the APSIM model can well simulate crop growth and development under different water treatments. The simulation results show that with the increase of the amount of nitrogen applied, the N2O emissions of different water treatments are increasing. The maximum yield of crop rotation is 150 kg / hm2~200 kg / hm2. Deficit irrigation at the same nitrogen application level reduce yield and N2O emissions under different water treatments. Under the nitrogen application rate of N150 in each crop, the T3 treatment has the maximum water use efficiency (2.06kg/m3) and the minimum N2O emission intensity (0.072) .in the crop rotation system. Under the nitrogen application rate of N200 in each crop, the T5 treatment has the maximum water use efficiency (2.08kg/m3) and the minimum N2O emission intensity (0.082).Sin the crop rotation system.【Conclusion】 Comprehensive economic and ecological effects of the winter wheat-summer maize rotation system, the nitrogen application rate of each crop is preferably 150 kg / hm2~200 kg / hm2, T3 and T5 treatments that are deficient in seedling grain filling stages are more conducive to the production keeping, water saving and emission reduction of winter wheat in GuanZhong Plain. |
| Key words: Deficit irrigation;nitrogen rate;APSIM model;N2O emissions;Yield |
|
|
|
|
|
|
