林分蓄积量与其静态持水能力关系的研究

通过对黑龙江省东部山地不同蓄积量的典型天然次生林的枯落物层、土壤层持水性能进行的研究,结果表明:随着单位面积蓄积量的不断增加,枯落物层、土壤层的有效持水量、最大持水量均有着不同程度的提高。其中单位面积蓄积量对枯落物层有效持水量的影响稍弱,但整体基本保持蓄积量增加、有效持水量也增加的趋势。通过指数回归分析可以看出,在林分静态持水各项能力指标中,单位面积蓄积量分别对枯落物层最大持水量、土壤层有效持水量影响最为显著。当蓄积量为241.56-369.95 m3.hm-2时,林分静态持水能力趋于稳定,水源涵养功能达到最大。

Relationship Between Growing Stock and Static Moisture Retention Power

Water-holding capacity of litter and soil of typical natural secondary forest with different stock volume on eastern mountains of Heilongjiang province were studied.The results indicate that the effective and maximum water-holding capacity of litter and soil increases distinctly with the increment of stock volume.The effect of per unit area growing stock on effective water-holding capacity is weaker,keeping the tendency of adding of growing stock and effective water-holding capacity.Through exponential curve regression,in each functional indexes of static moisture retention power,the effect of per unit area growing stock on the maximum water-holding capacity of litter and the effective water-holding capacity of soil are significantly.The static moisture retention power keeps steady and the water conservation reaches the maximum when the range of growing stock is from 241.56~369.95 m3·hm-2.