楠木人工林细根生物量季节动态及周转  

Seasonal Dynamics and Turnover of Fine-root Biomassin a Phoebe bournei Plantation

作　　者：郑金兴[1] 陈光水[2,3] 高人[2,3] 杨智杰[2,3] 

机构地区：[1]福建林业职业技术学院,福建南平353000 [2]福建省亚热带资源与环境重点实验室,福建福州350007 [3]福建师范大学地理科学学院,福建福州350007

出　　处：《三明学院学报》2012年第6期89-94,共6页Journal of Sanming University

基　　金：福建省自然科学基金(D0510018;2008J0124)

摘　　要：通过对福建省南平市37a生楠木人工林细根生物量季节动态及其周转的研究,结果表明,0～1 mm和1～2mm两个径级楠木活细根和死细根的平均生物量分别为2 598和1 960 kg.hm-2、2 679和1 746 kg.hm-2,林下植被(根径≤2 mm)的平均生物量为3 414 kg.hm-2。0～1 mm和1～2 mm两个径级的楠木活细根生物量在5月份或11月份出现峰值,而林下植被生物量峰值则出现在11月份和3月份。楠木林0～1 mm和1～2 mm两个径级的细根年生产量分别为8 167和4 605 kg.hm-2,周转率分别为3.14和2.35次.a-1。研究成果可为进一步研究楠木人工林生态系统的碳循环与养分循环提供基础数据。Through the research on seasonal dynamics and turnover of fine root biomass of 37a Phoebe bournci man-made forest in Nanping, Fujian, the results show that the average biomass of live fine root with two diameter classes being 0-1mm and 1 -2mm is 2 598 and 1 960 kg.hm-2 respectively, and that of dead fine root 2 679 and 1 746 kg.hm2 respectively, and the average biomass of understory vegetation （≤ 2mm in diameter） is 3 414 kg.hm-2. Biomass of live fine root of phoebebourme with two diameter classes being 0-1mm and 1 -2mm experiences peak value in November or May, while biomass of understory vegetation experiences peak value in November and March. The annual production of fine root of phoebebourme forest with two diameter classes being 0-1mm and 1 -2mm is 8 167 and 4 605 kg.hm-2 respectively, their turnover being 3.14 and 2.35 times.a-1 respectively. The research results can provide the fundamental data for further studies in carbon cycling and nutrient cycling of Phoebe bournci man-made forest ecosystem.

关 键 词：细根 生物量 季节动态 周转 楠木 

分 类 号：S718.55[农业科学—林学]