油松枯落物的水土保持作用研究

油松枯落物的截留量与其自身的干燥程度有关,同时受降水历时、降水量和天气情况的影响。在不同的月份,其截留量不同,年截留率为9.27％。油松枯落物阻延径流流出的时间与其厚度呈正相关,与地面坡度、径流深度呈负相关;油松枯落物还能有效地抑制土壤水分蒸发、显著提高土壤的抗蚀性,2cm厚枯落物的油松林地即可免遭土壤冲刷。

Effects of Withering Litter of Pine on Soil Conservation

The interception capacity of withering pine litter is positively correlated to its dryness, also affected by rainfall duration, rainfall volume and the climate..In different months, the capacity is different, annual interception percentage is 9. 27%. The detained time of runoff is positively correlated to the thickness of the litter, negatively correlated to slope of land and runoff depth. The withering pine litter can also check the e-vapotranspiration of soil moisture, obviously increase the anti-erosion ability of soil, 2cm thick of litter in pine forest land can prevent soil from being Washed. So the protection of withering litter should be seriously considered in soil conservation work.