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Position: Home > Articles > Litter production and its nutrient fluxes in an age sequence of Eucalyptus plantations. Chinese Journal of Ecology 2009,28 (10) 1928-1934

连续年龄序列桉树人工林凋落物量及养分通量

作  者:
刘文飞;樊后保;高春芬;黄荣珍;苏兵强
单  位:
南昌工程学院生态与环境科学研究所;福建省国有林场管理局
关键词:
尾巨桉人工林;年龄序列;凋落物量;养分通量
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(2、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3692.40kg.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(133.20kg.hm-2)>5年生(124.98kg.hm-2)>6年生(97.56kg.hm-2)>3年生(90.51kg.hm-2)>2年生(86.01kg.hm-2)。
译  名:
Litter production and its nutrient fluxes in an age sequence of Eucalyptus plantations.
作  者:
LIU Wen-fei1,FAN Hou-bao1,2,GAO Chun-fen1,3,HUANG Rong-zhen1,SU Bing-qiang4(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 of Landscape and Art,Jiangxi Agricultural University,Nanchang 330045,China;4Administration Bureau of National Forest Farms of Fujian Province,Fuzhou 353003,China) .
关键词:
Eucalyptus grandis×E. urophyllas plantation;age sequence;litter production;nutrientflux.
摘  要:
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 3-and 4-year-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(5.01%-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.

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