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为探究晋西北黄土区人工林土壤水分消耗与恢复特征,以岚县油松、杨树、杏树林地为研究对象,荒草地作为对照样地,通过定点观测与对比分析,对不同人工林植物水分亏缺度与植物水分补偿度进行了研究。结果表明:在干旱半干旱地区,3种人工林和荒草地0-300cm土层深度内均有不同程度的干层分布,杏树0-300cm土层均为严重干层,干层厚度最大。人工林植物水分亏缺度与补偿度均因树种不同而有一定差异,荒草地0-100cm土层植物水分亏缺最严重,平均亏缺度高达41.65%,油松次之,为36.40%。区域降水补偿深度不超过140cm,杏树0-300cm平均补偿度最高。3种人工林在120-200cm土层范围内均开始出现负补偿,200cm土层之后补偿度呈波动上升趋势。
In order to explore the characteristics of soil water consumption and restoration of artificial forests in the Loess area in northwestern China, taking Pinus tabulaeformis, Poplar and Almond groves of Lan County as the research object and the grassland as the control sample, through the fixed point observation and comparative analysis, Water deficit and plant water compensation were studied. The results showed that in the arid and semiarid regions, there were different degrees of dry layer distribution in depths of 0-300 cm in three kinds of plantations and grassland, and the layers of 0-300 cm in the apricot were all serious dry layer with the largest dry layer thickness. Plantation water deficit and compensatory degree are different due to different species, grassland 0-100cm soil layer is the most serious water deficit, the average deficit of up to 41.65%, followed by pine oil was 36.40%. Regional precipitation compensation depth does not exceed 140cm, apricot 0-300cm the highest average compensation. The three kinds of plantations began to show negative compensation in the range of 120-200cm soil layer, and the degree of compensation after 200cm soil layer fluctuated upward.