白龙江上游不同海拔梯度灌丛土壤渗透性能分析
发布时间:2019-05-24 06:44
【摘要】:对甘肃白龙江上游灌丛植被类型的土壤性状进行了研究,结果表明:(1)随海拔梯度的增加平均土壤密度、毛管孔隙度和非毛管孔隙度的变化差异较大。土壤平均密度在0.85~1.69 g·cm~(-3)之间,随着海拔的升高平均密度有逐渐减小的趋势,但在海拔梯度E(2 750~3 000 m)时平均密度最大,在E海拔梯度时0~10 cm土壤密度较小;平均孔隙度在24.41~66.22%之间,非毛管孔隙度在1.54~12.81%之间,孔隙度和密度呈负相关。(2)随着海拔梯度的增加毛管持水量、最大持水量、最小持水量都表现出先增加,到海拔梯度E(2 750~3 000 m)时减小,这与毛管孔隙度变化表现一致;排水能力随着海拔梯度的增加而减小,在27.79~7.86 mm之间。(3)不同海拔梯度类型土壤的初渗率、稳渗率和平均渗透率都有较大的差异,初渗率在2.02~20.90 mL·min~(-1)之间,稳渗率在0.35~6.20 mL·min~(-1)之间,渗透率和时间的关系符合幂函数回归方程Y=ax~(-b),相关系数显著性相关水平。
[Abstract]:The soil properties of thicket vegetation types in the upper reaches of Bailong River in Gansu Province were studied. the results showed that: (1) the average soil density, capillary porosity and non-capillary porosity varied greatly with the increase of altitude gradient. The average density of soil is between 0.85 鈮,
本文编号:2484643
[Abstract]:The soil properties of thicket vegetation types in the upper reaches of Bailong River in Gansu Province were studied. the results showed that: (1) the average soil density, capillary porosity and non-capillary porosity varied greatly with the increase of altitude gradient. The average density of soil is between 0.85 鈮,
本文编号:2484643
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