用浸水法对2个品种（四川桤木和台湾桤木）桤木人工林枯落物贮量，持水量，持水率和吸水速率进行了研究。结果表明：①四川桤木林下枯落物贮量(7.86 t/hm2)大于台湾桤木(7.35t/hm2)；②四川桤木比台湾桤木不论在总持水量还是在各层持水量上都要大；③枯落物持水率在不同浸泡时间段内为四川桤木半分解层>台湾桤木半分解层>台湾桤木未分解层>四川桤木未分解层④2个桤木品种的两个分解层吸水速率与浸泡时间之间符合W=at-b；⑤四川桤木林下枯落物持水能力好于台湾桤木。

We have done some researches about the litter storage, water holding capacity ,retention rate ,and water absorbing rate in man-made alder forest on the two series Alnus cremastogyne Burli and Alnus formosana using the flooding method. The result shows that the litter storage of Alnus cremastogyne Burli is 7.86 t/hm2 which is bigger than the Alnus formosana of 7.35t/hm2.
2. Either the whole water holding capacity or the water holding capacity of each layer is bigger than the Alnus formosana.The order of the retention rate of litter in different soak period is the half decomposed layer of the Alnus cremastogyne Burli > the half decomposed layer of Alnus formosana> the undecomposed layer of Alnus formosana> the undecomposed layer of Alnus cremastogyne Burli.
4.The water absorbing rate for the two series of alder of the two decomposed layer accord with W=at-b.
5. The water holding capacity of litter in Alnus cremastogyne Burli is better than Alnus formosana.

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