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研究了黄土高原西部丘陵区降水及植被空间分布特征,分析了不同降水条件下人工柠条林、混合灌木林、人工侧柏林、青杄林和人工落叶松林等5种植被类型0~100 cm土壤剖面中土壤水分含量及季节性变化。研究结果表明,0~100 cm的土壤储水量次序为青杄林>人工落叶松林>侧柏林>混合灌木林>柠条林。黄土高原西部丘陵区森林草原过渡带降水量无法完全补偿人工侧柏林生长季土壤水分消耗量,该地区选择侧柏进行人工林建设需要注意种植密度。黄土高原西部丘陵区草原地带降水量基本可以补偿人工柠条林生长季土壤水分消耗量,但随着柠条林林龄的增加,可能会出现植被水分亏缺。
The spatial distribution characteristics of precipitation and vegetation in the hilly area of the western Loess Plateau were studied. Five types of vegetation, 0 ~ 100 cm soil layer, such as Artificial Caragana korshinskii, Mixed shrubs, Artificial bermudagrass, Platycladus orientalis and Artificial Larix gmelinii, were analyzed under different rainfall conditions. Soil water content and seasonal variation in profile. The results showed that the order of soil water storage from 0 cm to 100 cm was the order of Chinese fir plantation> artificial Larix gmelinii> Platycladus orientalis> mixed shrub plant> Caragana microphylla plantation. The rainfall in the transition zone of forest and grassland in the western hilly region of the Loess Plateau can not fully compensate the soil moisture consumption during the growth season of Artificial Platycladus orientalis. The precipitation in the grassland zone in the western hilly region of the Loess Plateau can basically compensate for the soil water consumption in the growth season of Artemisia langeus. However, with the increasing age of Caragana korshinskii, water deficit may occur.