不同种植年限枸杞种植系统温室气体通量的变化特征与预测
刘亚俊杰 , 王世全 , 周美萍 , 孟晨 , 杨帆
农业科学研究(中英文) ›› 2026, Vol. 47 ›› Issue (01) : 13 -19.
不同种植年限枸杞种植系统温室气体通量的变化特征与预测
Patterns and prediction of greenhouse gas fluxes in wolfberry cultivation systems across cultivation ages
为研究并预测干旱区农业生态系统温室气体排放对土地利用变化的响应,以宁夏中宁县不同种植时间(0、1、5、10 a)枸杞地为对象,测定土壤理化性质及CO₂、N₂O、CH₄的排放通量,并构建自回归滑动平均模型(ARIMA模型)预测其动态变化。结果表明:CO₂和N₂O的排放通量随着种植时间推移显著上升,CH₄的通量变化不显著;夏季排放通量高于冬季,季节性差异显著;土壤质量含水率与pH是影响温室气体排放的关键因子。基于此构建的ARIMA模型预测效果良好,其中对CH₄通量的预测精度最高。预测结果显示,在未来一段时间内,各温室气体通量将保持相对稳定或小幅上升趋势。
To investigate and predict how greenhouse gas emissions in arid zone agricultural ecosystems respond to land use change, this study examined wolfberry fields in Zhongning County, Ningxia, spanning four planting ages (0, 1, 5, and 10 years). it measured soil physicochemical properties and the fluxes of CO₂, N₂O, and CH₄, and developed autoregressive integrated moving average (ARIMA) models to predict their temporal dynamics. CO₂ and N₂O fluxes increased significantly with planting age, whereas CH₄ flux showed no significant change. Fluxes were higher in summer than in winter, indicating pronounced seasonal differences. Soil water content and pH were identified as key controls on greenhouse gas emissions. The ARIMA models performed well overall, with the highest predictive accuracy for CH₄ flux. Forecasts suggest that, over the near term, greenhouse gas fluxes will remain relatively stable or exhibit slight increases. This study elucidated the spatiotemporal patterns and dominant controls of greenhouse gas emissions in wolfberry cultivation systems and provides a forecasting tool to support regional low-carbon agricultural management.
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宁夏自然科学基金项目(2023AAC03052)
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