低丘红壤区旱田水热通量特征及其气象影响因素
发布时间：2018-10-23 19:57
【摘要】：为研究低丘红壤区近地层农田水热通量特征,更好地利用农业气候资源、理解农业水文生态系统过程,利用2013年和2014年田间波文比系统数据和气象资料,分析了红壤区近地层的水热通量分配特征及相关气象因素的影响。结果表明:1能量平衡各个分量的日变化呈单峰趋势且受到天气条件影响很大,其中潜热通量所占份额最大,感热和土壤热通量均较小。2能量平衡各分量的分配具有季节性变化,7月份净辐射和潜热通量较大,土壤热通量在5月、7月为正值,10月、12月为负,表明研究区土壤在秋冬季节向外输出热量;在花生的生长季,花生地的波文比小于橘园,表明花生地的潜热交换多于橘园。3对旱地潜热和感热影响较大的气象因素有净辐射、相对湿度,其次有气温,而风速和水汽压对潜热、感热交换的影响并不显著。雨季降水量与农田潜热、感热总体呈负相关,旱季降水量影响相对较小。
[Abstract]:In order to study the characteristics of water and heat fluxes in near-ground farmland in low hilly red soil region, to make better use of agroclimatic resources, to understand the process of agro-hydrological ecosystem, and to use the systematic data and meteorological data of field Povenby in 2013 and 2014, The characteristics of water and heat flux distribution and the influence of meteorological factors on the near earth layer in red soil region were analyzed. The results show that: 1 the diurnal variation of each component of energy balance shows a single peak trend and is greatly affected by the weather conditions, in which the latent heat flux accounts for the largest share. The distribution of the components of the energy balance is seasonal, and the net radiation and latent heat fluxes are larger in July. The soil heat flux is positive in May, July, October and December. The results showed that the soil heat output in the autumn and winter seasons and the Bowen ratio in the peanut growing season were lower than those in the orange orchard, indicating that the latent heat exchange in the peanut field was more than that in the orange orchard. 3 net radiation was found in the meteorological factors which had a great influence on the latent heat and sensible heat in dry land. Relative humidity, followed by air temperature, wind speed and water vapor pressure have no significant effect on latent heat and sensible heat exchange. The precipitation in rainy season is negatively correlated with latent heat and sensible heat in farmland, but the effect of precipitation in dry season is relatively small.
【作者单位】： 气象灾害预报预警与评估协同创新中心/江苏省农业气象重点实验室;南京信息工程大学应用气象学院;
【基金】：国家自然科学基金(41175098) 第九批“六大人才高峰”高层次人才项目(NY-038)资助
【分类号】：S161;S152
，
本文编号：2290314
[Abstract]:In order to study the characteristics of water and heat fluxes in near-ground farmland in low hilly red soil region, to make better use of agroclimatic resources, to understand the process of agro-hydrological ecosystem, and to use the systematic data and meteorological data of field Povenby in 2013 and 2014, The characteristics of water and heat flux distribution and the influence of meteorological factors on the near earth layer in red soil region were analyzed. The results show that: 1 the diurnal variation of each component of energy balance shows a single peak trend and is greatly affected by the weather conditions, in which the latent heat flux accounts for the largest share. The distribution of the components of the energy balance is seasonal, and the net radiation and latent heat fluxes are larger in July. The soil heat flux is positive in May, July, October and December. The results showed that the soil heat output in the autumn and winter seasons and the Bowen ratio in the peanut growing season were lower than those in the orange orchard, indicating that the latent heat exchange in the peanut field was more than that in the orange orchard. 3 net radiation was found in the meteorological factors which had a great influence on the latent heat and sensible heat in dry land. Relative humidity, followed by air temperature, wind speed and water vapor pressure have no significant effect on latent heat and sensible heat exchange. The precipitation in rainy season is negatively correlated with latent heat and sensible heat in farmland, but the effect of precipitation in dry season is relatively small.
【作者单位】： 气象灾害预报预警与评估协同创新中心/江苏省农业气象重点实验室;南京信息工程大学应用气象学院;
【基金】：国家自然科学基金(41175098) 第九批“六大人才高峰”高层次人才项目(NY-038)资助
【分类号】：S161;S152
，
本文编号：2290314
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