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生态学杂志 ›› 2009, Vol. 28 ›› Issue (10): 1928-1934.

• 研究报告 • 上一篇    下一篇

连续年龄序列桉树人工林凋落物量及养分通量

刘文飞1;樊后保1,2** ;高春芬1,3 ;黄荣珍1 ;苏兵强4   

  1. 1南昌工程学院生态与环境科学研究所, 南昌 330099;2福建农林大学林学院, 福州 350002; 3江西农业大学园林与艺术学院, 南昌 330045; 4福建省国有林场管局, 福州 350003
  • 出版日期:2009-11-10 发布日期:2009-11-10

Litter production and its nutrient fluxes in an age sequence of Eucalyptus plantations.

 LIU Wen-Fei1 ;FAN Hou-Bao1,2 ;GAO Chun-Fen1,3 ;HUANG Rong-Zhen1 ;SU Bing-Jiang4   

  1. 1Research Institute of Ecology &|Environmental Science, Nanchang Institute of Technology, Nanchang 330099, China|2College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China|3College ofLandscape and Art, Jiangxi Agricultural University, Nanchang 330045, China|4Administration Bureau of National Forest Farms of Fujian Province, Fuzhou353003, China
  • Online:2009-11-10 Published:2009-11-10

摘要: 在福建漳州地区,对连续年龄序列(2、3、4、5、6年生)的尾巨桉(Eucalyptus grandis×E. urophylla)人工林凋落物量及其养分通量进行了研究。结果表明:不同林龄(1、3、4、5和6年生)的年凋落物总量分别为279665、309810、448913、420072和3692.40 kg·hm-2,呈现先期增加,4年生后出现缓慢下降的趋势。各年龄段林分凋落物量均显示出明显的季节动态,其中3、4和6年生林分呈单峰型,前二者出现在6月,后者出现在4月;而2和5年生林分则出现2个峰值,前一个峰值出现在4月,后一峰值出现在6月。在凋落物的组成中,落叶占总凋落物量的8486%~9004%,其次分别为碎屑物(5.01%~6.70%)、落枝(2.95%~4.52%)、树皮(2.64%~3.62%)和落果(0.30%~0.55%)。凋落物各组分中,主要养分元素含量大小顺序为N>Ca>K>Mg>P。各龄级桉树人工林凋落物中5种元素的年通量的大小顺序表现为: 4年生(133.20 kg·hm-2)>5年生(124.98 kg·hm-2)>6年生(97.56 kg·hm-2)>3年生(90.51 kg·hm-2)>2年生(86.01 kg·hm-2)。

关键词: 光合作用, 生理生态, 城市森林

Abstract: The measurements on the litter production and its nutrient fluxes in an age sequence of Eucalyptus grandis×E. urophyllas plantations were studied in Zhangzhou, Fujian Province. The results showed that the annual litter production of 2, 3, 4, 5, and 6year old E. grandis×E. urophyllas plantations was 279665, 309810, 4489.13, 4200.72, and 3692.40 kg·hm-2, respectively, showing an increase with stand age at early stage, but slightly decline after 4yearold. The litter production of 3and 4yearold stands and that of 6yearold stand showed a single peak in early summer (June) and in midspring (April), respectively, while that of 2 and 5yearold stands exhibited one peak in midspring (April) and another peak in summer (June). In the litters, fallen leaves occupied the greatest proportion (84.86%-90.04%), followed by miscellaneous materials (501%-6.70%), branches (2.95%-4.52%), barks (2.64%-3.62%), and fruits (0.30%-0.55%). The nutrient contents in the litters were N>Ca>K>Mg>P, and their annual fluxes in the 2, 3, 4, 5, and 6year old E. grandis×E. urophyllas plantations were 86.01, 90.51, 133.20, 124.98, and 97.56 kg·hm-2, respectively.

Key words: Photosynthesis, Eco-physiology, Urban forest