| 引用本文: | 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,():-. |
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| 摘要: |
| 【目的】为研究关中平原冬小麦-夏玉米不同施氮量下不同生育期亏缺灌溉对冬小麦-夏玉米轮作体系N2O排放量及产量的影响,优化水氮管理措施。【方法】通过2016年10月~2018年10月田间试验得到不同亏缺灌溉处理下作物产量、土壤水分和N2O排放量数据；并利用得到的数据对农田生态系统管理模型(APSIM)进行调参,使用验证后的APSIM模型模拟不同施氮水平N50(50kg/hm2)、N100(100kg/hm2)、N150(150kg/hm2)、N200(200kg/hm2)、N250(250kg/hm2)、N300(300kg/hm2)和不同水分处理CK(充分灌水)、T1(苗期和拔节期重度亏水)、T2(苗期重度亏水、拔节期中度亏水)、T3(苗期重度亏水、灌浆期中度亏水)、T4(苗期和拔节期中度亏水)、T5(苗期和灌浆期中度亏水)下,作物产量、N2O排放量、N2O气体排放强度和水分利用效率变化特征。【结果】调参验证结果显示APSIM模型可以很好的模拟不同水分处理下作物生长发育,模拟结果表明随着施氮量的增加,各水分处理N2O排放量均呈上升趋势,轮作产量在每季作物施氮量150kg/hm2~200 kg/hm2达到最大,在不同水分处理下,同一施氮水平亏缺灌溉会导致产量和N2O排放量下降,在每季作物施氮N150水平下,整个轮作体系中T3处理水分利用效率最大,为2.06kg/m3,N2O排放强度最小为0.072,在每季作物施氮N200水平下,T5处理水分利用效率最大,为2.08kg/m3,N2O排放强度低于CK和T4处理,为0.082。【结论】综合考虑冬小麦-夏玉米轮作体系经济和生态效应,在每季作物施氮量以150kg/hm2~200 kg/hm2为佳,在苗期和灌浆期亏水的T3和T5处理更有利于节能减排。 |
| 关键词: 亏缺灌溉;施氮水平;APSIM模型;N[sub_s]2[sub_e]O排放;产量 |
| DOI： |
| 分类号:S274.1 |
| 基金项目:国家重点研发项目(2016YFC0400200);国家自然科学(51879223) |
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| Research on N2O emission from farmland under different water and nitrogen treatment based on APSIM model |
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machenguang, caihuanjie, luyajun
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North West Agriculture and Forestry University
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| 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 |
