雷州半岛桉林-砖红壤水分动态变化特征研究

根据定位观测数据,对雷州半岛浅海沉积物发育的桉林地砖红壤水分状况及其动态变化进行了初步探讨.结果表明,受水分蒸发量大等因素的影响,0～100 cm土层月均贮水量较低;主要受降雨分布的影响,土壤水分呈明显的季节性变化特征且季节性干旱时间较长,8～

Study on moisture dynamic variation characteristics of latosol under eucalyptus in Leizhou Peninsula

Based on the data of observation in fixed location, the primarily study on moisture dynamic variation characteristics oflatosol under eucalyplus in Leizhou Peninsula has been done. It was showed that, the stored water content in 0~l00cm soil layerwas lower; being controlled by rainfa1l distribution, the stored water presented clear annual and seasonable changes, the highestcontent of stored water being appeared in August and September, the lowest one being appeared in March. It was found that even inrain season, very wide range in change of the stored water content in a short time could bring out, which means that the latosol undereucalyplu soil is quite easy to suffer from drought. The vertical changes of stored water content in latosol under eucalyplus showedrising with the depth increase. In dry season, the vertical changes of stored water content in 0~60 cm surface soil layer was muchmore greatly, which reflects the more effect of upward evaportranspiration of soil moisture, white in rain season, the range of verticalchanges in stored water was quite small, which reflects the predominate effect of rainfall infiltration.