【摘要】：為研究低丘紅壤區(qū)近地層農(nóng)田水熱通量特征,更好地利用農(nóng)業(yè)氣候資源、理解農(nóng)業(yè)水文生態(tài)系統(tǒng)過(guò)程,利用2013年和2014年田間波文比系統(tǒng)數(shù)據(jù)和氣象資料,分析了紅壤區(qū)近地層的水熱通量分配特征及相關(guān)氣象因素的影響。結(jié)果表明:1能量平衡各個(gè)分量的日變化呈單峰趨勢(shì)且受到天氣條件影響很大,其中潛熱通量所占份額最大,感熱和土壤熱通量均較小。2能量平衡各分量的分配具有季節(jié)性變化,7月份凈輻射和潛熱通量較大,土壤熱通量在5月、7月為正值,10月、12月為負(fù),表明研究區(qū)土壤在秋冬季節(jié)向外輸出熱量;在花生的生長(zhǎng)季,花生地的波文比小于橘園,表明花生地的潛熱交換多于橘園。3對(duì)旱地潛熱和感熱影響較大的氣象因素有凈輻射、相對(duì)濕度,其次有氣溫,而風(fēng)速和水汽壓對(duì)潛熱、感熱交換的影響并不顯著。雨季降水量與農(nóng)田潛熱、感熱總體呈負(fù)相關(guān),旱季降水量影響相對(duì)較小。
[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.
【作者單位】： 氣象災(zāi)害預(yù)報(bào)預(yù)警與評(píng)估協(xié)同創(chuàng)新中心/江蘇省農(nóng)業(yè)氣象重點(diǎn)實(shí)驗(yàn)室;南京信息工程大學(xué)應(yīng)用氣象學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41175098) 第九批“六大人才高峰”高層次人才項(xiàng)目(NY-038)資助
【分類號(hào)】：S161;S152
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本文編號(hào)：2290314