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| 马尾松林4种林分改造树种枯落物持水特性 |
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杨俊生,陈应彪,王俊林,陈雪林,陈红跃
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饶平县林业局,饶平县林业科学研究所 潮州,饶平县林业科学研究所 潮州,饶平县林业科学研究所 潮州,华南农业大学林学院 广州
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| 摘要: |
| 对广东省潮州市饶平县的樟（Cinnamomum camphora）、桃花心木（Swietenia mahagoni）、南酸枣（Choerospondias axillaris）和乐昌含笑（Michelia chapensis）4种林分改造树种枯落物储量及持水特性进行研究。结果表明，樟、桃花心木、南酸枣和乐昌含笑枯落物鲜重分别为7.74,8.94,10.38,6.87 t/hm2；各树种枯落物干重为南酸枣（7.89 t/hm2）>桃花心木（6.55 t/hm2）>樟（5.44 t/hm2）>乐昌含笑（4.66 t/hm2）；最大持水量、最大拦蓄量和有效拦蓄量变化规律基本一致，顺序都为南酸枣>桃花心木>樟>乐昌含笑，而4个树种的最大持水率、最大拦蓄率和有效拦蓄率排序相反。枯落物持水量与浸泡时间、持水率与浸泡时间之间、吸水速率与浸泡时间都存在明显的相关关系。在不同浸泡时间段，4种改造树种枯落物持水量和吸水速率均为南酸枣>桃花心木>樟>乐昌含笑，而其持水率呈现相反顺序。 |
| 关键词: 枯落物 持水量 拦蓄量 吸水速率 |
| DOI： |
| 分类号:S714 |
| 基金项目:广东省林业科技创新项目(2009KJCX011-02)。 |
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| Water holding Characteristics of Four Tree Species in Transformation Plantations of Pinus massoniana |
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yangjunsheng,chenyingbiao,王俊林,陈雪林 and chenhongyue
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College of Forstry, South China Agricultural University
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| Abstract: |
| This paper mainly studied storage and water holding characteristics of forest litter of four tree species (Cinnamomum camphora, Swietenia mahagoni, Choerospondias axillaris and Michelia chapensis) in transformation plantations of Pinus massoniana in Raoping, Chaozhou, Guangdong. The fresh litter storage were 7.74 t·hm-2 for Cinnamomum camphora, 8.94 t[DK]·hm-2 for S. mahagoni, 10.38 t[`hm-2 for Choerospondias axillaris and 6.87 t·hm-2 for M. chapensis. The order of dry litter storage was Choerospondias axillaris (7.89 t`hm-2)>S. mahagoni (6.55 t·hm-2)>Cinnamomum camphora (5.44 t·hm-2)>M. chapensis (4.66 t·hm-2). The changing trends of the maximum water holding capacity, maximum interception capacity and effective interception capacity were the same with the order of Choerospondias axillaris >S. mahagoni >Cinnamomum camphora >M. chapensis. However, the orders of maximum water holding content, maximum interception content and effective interception content were inverse of those. There were correlation between litter water holding capacity and soaking time, litter water holding content and soaking time, water absorption rate of litter and soaking time, respectively. Water holding capacity and water absorption rate of litter followed the order of Choerospondias axillaris >S. mahagoni >Cinnamomum camphora >M. chapensis, while litter water holding content had a inverse order.\ |
| Key words: litter water holding capacity interception amount water absorption rate |
