| 黄金华.秃杉中龄人工林凋落物量8 年动态特征[J].广东农业科学,2017,44(9):56-62 |
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秃杉中龄人工林凋落物量8 年动态特征 |
| Dynamics of litter production in a middle-aged Taiwania cryptomerioides plantation over an 8-year period |
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| DOI：10.16768/j.issn.1004-874X.2017.09.009 |
| 中文关键词: 秃杉 人工林 凋落物生物量 |
| 英文关键词: Taiwania cryptomerioides plantation litter production |
| 基金项目: |
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| 摘要点击次数: 1924 |
| 全文下载次数: 717 |
| 中文摘要: |
| 在福建顺昌15 年生秃杉人工林中设置凋落物框，连续8 年每月收集凋落物并测定凋落物量，
结果表明：造林后第16～23 年的秃杉人工林凋落物年产量介于3.529～5.526 t/hm2 之间，年均凋落物量
4.166（±0.222）t/hm2。年凋落物量（y）总体上随着林龄（x）的增加而递增。凋落物中的秃杉叶加带叶
小枝（直径≤ 0.6 cm）、秃杉大枝（直径>0.6 cm）、林下植物的叶、杂物（虫粪、林下植物花果以及难以
识别的其他植物成分）、林下其他木本植物的枝、树皮和花果分别占凋落物总生物量的94.642%、2.756%、
1.517%、0.747%、0.211%、0.124% 和0.004%。秃杉落花落果仅在造林后第17 年2 月收集到，当年生物量仅
为0.001 t/hm2。秃杉人工林月凋落量在5～8 月出现峰值，最大峰值出现在6 月；各季节凋落量则以夏季凋
落量最大，冬季凋落量最小。 |
| 英文摘要: |
| Litter traps were set up in a 15-year-old Taiwania cryptomerioides plantation to collect litterfall
at monthly intervals over an 8-year period in Shunchang，Fujian，China. Annual litter production of the T.
cryptomerioides plantation varied from 3.529 t/hm2 to 5.526 t/hm2 at age 16 to 23 years and the mean value was 4.166
±0.222（ SE） t/hm2. Annual litterfall production（ y） increased with plantation age（ x） and it could be described
by a quadratic equation: y = -0.0129x2 + 0.7004x - 4.5002（ R2 = 0.5892，P = 0.108）. Litter of leaves plus twigs
（diameter ≤ 0.6 cm） of T. cryptomerioides，branched（ diameter >0.6 cm） of T. cryptomerioides，understory leaves，
miscellaneous materials（ insect faeces，reproductive organs of understory and unidentified plant parts），understory
branches of woody plants，stem bark and reproductive organs contributed to 94.642%，2.756%，1.517%，0.747%，
0.211%，0.124% and 0.004% of the total annual litterfall，respectively. Reproductive litter of T. cryptomerioides was
only found in February at age 17 years with biomass only 0.001 t/hm2. The peaks of litter occurred in May to August
with the major peak in June. The highest litterfall occurred in summer and the lowest in winter. |
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