摘要
以设施番茄为研究对象,开展不同水氮输入对设施番茄产量、温室气体排放、植株吸氮量等指标影响,基于实验监测数据,构建设施番茄种植情况下的土壤碳氮循环模型DNDC,并对模型的精度进行验证。结果表明:DNDC模型能够较好地模拟设施番茄产量以及N_(2)O、CO_(2)等温室气体的排放量;采用线性回归分析,构建了CH_(4)排放预测模型,预测模型能够更加准确地通过DNDC模拟值反映CH_(4)实际排放量,模型R^(2)值为0.745,模拟结果均通过显著性检验。研究成果可为设施蔬菜生产的水氮管理模式提供参考,同时对于农田降氮减排潜力的研究具有一定的指导意义。
Greenhouse tomatoes were taken as the research object.Tests were conducted on indicators such as greenhouse gas emissions,plant nitrogen uptake,and yield under different water and nitrogen inputs.Based on experimental monitoring data,a soil carbon-nitrogen cycling model(DNDC model)was constructed for greenhouse tomato cultivation,and the accuracy of the model was validated.It was shown that the greenhouse tomato yield and emissions of greenhouse gases such as N2O and CO2 could be well simulated by the DNDC model.The CH4 emission prediction model was constructed using linear regression analysis.The actual CH4 emissions could be more accurately reflected through DNDC simulation values by the prediction model,with an R’value of 0.745,and the simulation results passed significance tests.The research results can provide references for water and nitrogen management models in greenhouse vegetable production and have certain guiding significance for the study of nitrogen reduction and emissions in farmland.
作者
陈楠
丁子俊
仇彬逻
范海燕
马志军
孙世宇
甘星
CHENG Nan;DING Zijun;QIU Bingluo;FAN Haiyan;MA Zhijun;SUN Shiyu;GAN Xing(Beijing Water Science and Technology Institute,Beijing 100048,China;Beijing University of Technology,Beijing 100124,China;Hohai University,Nanjing 210024,China;Beijing River and Lake Basin Management Affairs Center,Beijing 102600,China;Beijing unconventional water resources development and utilization and Water-saving engineering technology research center,Beijing 100048)
出处
《北京水务》
2023年第4期72-80,共9页
Beijing Water
