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。
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·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.
出处
《广东林业科技》
2014年第4期37-41,共5页
Forestry Science and Technology of Guangdong Province
基金
广东省林业科技创新项目(2009KJCX011-02)
关键词
枯落物
持水量
拦蓄量
吸水速率
litter
water-holding capacity
interception amount
water absorption rate
