| 蒋丽伟.北京山区4 种典型林分枯落物持水
特性的定量分析[J].广东农业科学,2016,43(12):30-35 |
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北京山区4 种典型林分枯落物持水
特性的定量分析 |
| Quantitative analysis of water holding capacity of 4 typicalforest litters in Beijing mountainous area |
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| DOI：10.16768/j.issn.1004-874X.2016.12.006 |
| 中文关键词: 北京山区 枯落物 持水过程 持水速率 |
| 英文关键词: Beijing mountainous area litters water holding process water holding rate |
| 基金项目: |
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| 摘要点击次数: 1862 |
| 全文下载次数: 727 |
| 中文摘要: |
| 以北京山区4 种典型林分为研究对象，测定各林分枯落物的蓄积量，并采用室内浸泡法对枯落
物持水过程进行分析，结果表明：（1）林分枯落物厚度及蓄积量均表现为栓皮栎林＞侧柏林＞油松林＞刺
槐林，其中半分解层蓄积量占80% 以上；（2）最大持水量变化范围为9～77 t/hm2，有效持水量变化范围为
6～53 t/hm2；（3）枯落物持水过程表现为“迅速吸水- 缓慢吸水- 逐渐饱和”，相同持水时间下，4 种林分
的未分解层枯落物持水量大小为刺槐＞栓皮栎＞侧柏、油松，半分解层枯落物持水量大小为栓皮栎＞油松
＞侧柏＞刺槐；（4）枯落物吸水速率随浸水时间的增加而减小，两者呈一定的幂函数关系（V = ktn）。 |
| 英文摘要: |
| Four typical forests were selected to investigate the stock volume and water-holding capacity of litter
layers，the results showed that：（1） the order of total storage capacity of four litters showed as Quercus variabilis
＞ Platycladus orientalis ＞ Pinus tabuliformis ＞ Robinia pseudoacacia，and the volume of half decomposition
accounted for more than 80%；（2） the maximum capacity of litter layer ranged from 9 t/hm2 to 77 t/hm2，and the
effective capacity ranged from 6 t/hm2 to 53 t/hm2；（3） the water holding of litters showed a process o“f rapid absorptionslow
absorption-gradual saturated”；under the same soaking time，the water holding capacity of undecomposed litters
showed as R. pseudoacacia ＞ Q. variabilis ＞ P. orientalis，P. tabuliformis，and the water holding capacity of half
decomposed litters showed as Q. variabilis ＞ P. tabuliformis ＞ P. orientalis ＞ R. pseudoacacia；（4） the absorption
rate decreased by immersion time，and they showed a power function relationship（ V=ktn）. |
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