| 华南典型人工林凋落物的持水特性 |
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| 引用本文： | 薛立,何跃君,屈明,吴敏,徐燕.华南典型人工林凋落物的持水特性[J].植物生态学报,2005,29(3):415-421. |
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| 作者姓名： | 薛立 何跃君 屈明 吴敏 徐燕 |
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| 作者单位： | 华南农业大学林学院， 广州510642 |
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| 基金项目： | 中国科学院知识创新工程项目，国家基金，广东省林业局科研项目 |
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| 摘 要： | 对于华南地区的杉木(Cunninghamia lanceolata)林、马尾松(Pinus massoniana)林、湿地松(Pinus elliottii)林、马占相思(Acacia mangium)林和尾叶桉(Eucalyptus urophylla)林的凋落物的储量、持水量、持水率和吸水速率进行了研究。结果表明，杉木林的凋落物的干重（6.5×103 kg·hm－2）最大，其次是马尾松林和马占相思林（5.5×103 kg·hm－2），而湿地松林（4.1×103 kg·hm－2）和尾叶桉林较小（4.0×103 kg·hm－2）。凋落物持水量呈现杉木林>马占相思林>尾叶桉林>马尾松林>湿地松林。各林分凋落物的最大持水量为杉木林17.9×103 kg·hm－2，马占相思林14.8×103 kg·hm－2，尾叶桉林14.0×103 kg·hm－2，马尾松林10.6×103 kg·hm－2，湿地松林9.8×103 kg·hm－2。尾叶桉林、杉木林、马占相思林、湿地松林和马尾松林的凋落物最大持水率分别为351%、274%、269%、235%和191%。凋落物持水量和凋落物持水率随着浸泡时间的增加按照对数方程增加。5种林分中尾叶桉林的凋落物吸水速率在各浸泡时间后居首位，杉木林和马占相思林中等，湿地松林较小，而马尾松林最小,各林分的凋落物的吸水速率随浸泡时间的增长按方程Y=a+b·t-1下降。
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| 关 键 词： | 人工林 凋落物储量 凋落物持水量 凋落物持水率 凋落物吸水速率 |
| 修稿时间： | 2004年7月29日 |
WATER HOLDING CHARACTERISTICS OF LITTER IN PLANTATIONS IN SOUTH CHINA |
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| XUE Li,HE Yue-jun,QU Ming,WU Min,XU Yan.WATER HOLDING CHARACTERISTICS OF LITTER IN PLANTATIONS IN SOUTH CHINA[J].Acta Phytoecologica Sinica,2005,29(3):415-421. |
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| Authors: | XUE Li HE Yue-jun QU Ming WU Min XU Yan |
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| Affiliation: | College of Forestry, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | Litter characteristics, such as standing crop, water holding capacity, and proportional water holding capacity and absorption rates, were studied in plantations of Cunninghamia lanceolata, Pinus massoniana, Pinus elliottii, Acacia mangium and Eucalyptus urophylla. The dry litter standing crop of C. lanceolata plantation was the largest (6.5×103 kg·hm－2) among the five plantations, followed by the P. massoniana and A. mangium plantations (5.5×103 kg·hm－2), the P. elliottii plantation (4.1×103 kg·hm－2) and the E. urophylla plantation (4.0×103 kg·hm－2). The order of total water holding capacity of litter was C. lanceolata plantation (17.9×103 kg·hm－2) > A. mangium plantation (14.8×103 kg·hm－2) > E. urophylla plantation (14.0×103 kg·hm－2) > P. massoniana plantation (10.6×103 kg·hm－2) > P. elliottii plantation (9.8×103 kg·hm－2). The proportional water holding capacity as a percentage of the litter dry weight in E. urophylla, C. lanceolata, A. mangium, P. elliottii and P. massoniana plantations were 351%, 274%, 269%, 235% and 191%, respectively. The total water holding capacity and proportional water holding capacity of litter increased logarithmically with increasing time immersed in water. The water absorption rate of litter in E. urophylla plantation was the largest among the five plantations, medium in the C. lanceolata and A. mangium plantations, lower in the P. elliottii plantation, and lowest in the P. massoniana plantation. Water absorption rates of litter in all plantations decreased according to equation Y=a+b·t-1 with increasing time immersed in water. |
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| Keywords: | Plantation Litter standing crop Water holding capacity of litter Water absorption rate of litter |
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