中国土壤与肥料Issue(1)：107-117,11.DOI:10.11838/sfsc.1673-6257.24214
不同氮源对芦苇好氧堆肥中温室气体排放及碳氮损失的影响
Effects of different nitrogen sources on greenhouse gasses emissions and carbon/nitrogen losses in aerobic composting of reeds
摘要
Abstract
Aerobic composting of reed straw with exogenous nitrogen addition is an important way to utilize reed resources.The greenhouse gas emissions and carbon and nitrogen losses of aerobic straw composting are mainly affected by the type of nitrogenous substrate,substrate carbon and nitrogen ratio and additional inputs.In order to investigate the effects of different nitrogen sources on greenhouse gas emissions and carbon and nitrogen losses during aerobic composting of reed,a 40 d aerobic composting test was carried out with reed as the raw material,and two treatments were set up:addition of urea and addition of ryegrass,and the static box-gas chromatography was used to determine the concentrations of CO2,CH4 and N2O,and the traditional chemical analysis was also utilized to determine the physicochemical Indicators.The results showed that:(1)The carbon loss in the urea treatment and ryegrass treatment accounted for 46.85%-47.03%and 46.62%-46.78%of the initial total carbon,respectively;the nitrogen loss accounted for 9.81%-13.23%and 8.92%-10.62%of the initial total nitrogen,respectively.CO2-C loss in the ryegrass treatment was significantly increased by 5.41%-8.38%,compared to the urea treatment;Neither treatment accounted for more than 0.01%of the total carbon loss with CH4-C loss;N2O-N loss in the urea treatment was significantly increased by 24.11%-30.93%,compared to the ryegrass treatment.The NH3-N loss of urea treatment was significantly increased by 10.42%-27.63%than that of ryegrass treatment.(2)Physicochemical indicators were correlated with the emission fluxes of CO2,CH4,N2O and NH3.Temperature and total organic carbon were positively correlated with CO2,CH4 and NH3 emissions;C/N was positively correlated with CO2 and CH4 emissions;NO3--N was negatively correlated with CO2 and CH4 emissions,but significantly positively correlated with N2O emissions.The results of redundancy analysis showed that NO3--N and C/N had the greatest influence on CO2,CH4,N2O and NH3 emissions.(3)Regardless of the model,the cumulative emissions of the three Greenhouse Gases were the largest for CO2 and the smallest for CH4.(4)The emission characteristics of greenhouse gases and NH3 from different nitrogen sources were different.The addition of ryegrass increased the cumulative emissions of CO2 and CH4 by 9.64%and 0.23%,respectively,decreased the cumulative emissions of N2O by 28.76%,and increased the total greenhouse gas emission equivalent by 48.48 kg·t-1.The study showed that the ryegrass treatment had smaller carbon loss and nitrogen loss,and the urea treatment was more effective in terms of total greenhouse gas emission reduction.Combined with the seed germination index of the two treatments,ryegrass was recommended as a nitrogen source with reed aerobic composting.关键词
芦苇/氮源/黑麦草/堆肥/温室气体/碳氮损失Key words
reed/nitrogen source/ryegrass/composting/greenhouse gases/carbon and nitrogen losses引用本文复制引用
梁玉伟,张世文,胡睿鑫,郭丹丹,陈方可,胡含秀..不同氮源对芦苇好氧堆肥中温室气体排放及碳氮损失的影响[J].中国土壤与肥料,2025,(1):107-117,11.基金项目
长三角典型流域多源有机固废集约化处置集成示范(SQ2020YFC190126). （SQ2020YFC190126）
