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林业科学 ›› 2002, Vol. 38 ›› Issue (4): 14-18.doi: 10.11707/j.1001-7488.20020403

• 论文及研究报告 • 上一篇    下一篇

速生阶段杉木人工林产量结构及生产力的代际效应

田大伦 项文化 闫文德 康文星   

  1. 中南林学院生态研究室,株洲412006
  • 收稿日期:2001-05-18 修回日期:1900-01-01 出版日期:2002-07-25 发布日期:2002-07-25

EFFECT OF SUCCESSIVE-ROTATION ON PRODUCTIVITY AND BIOMASS OF CHINESE FIR PLANTATION AT FAST GROWING STAGE

Tian Dalun,Xiang Wenhua,Yan Wende,Kang Wenxing   

  1. Research Section of Ecology, Central South Forestry University Zhuzhou412006
  • Received:2001-05-18 Revised:1900-01-01 Online:2002-07-25 Published:2002-07-25

摘要:

通过定位观测取得的数据,对速生阶段第2代杉木人工林生物量和生产力进行研究,并在时间和空间上与第1代杉木林进行比较。结果表明:第1、2代杉木林单株和林分生物量分别为37.54、34.74kg和85.6、71.45t·hm-2,第2代比第1代下降了8.52%和16.53%。第1代杉木林生态系统的生物量为87.93t·hm-2,第2代为76.02t·hm-2,比第1代低13.54% ,乔木层所占比例也比第1代小,而灌木、草本和死地被层的生物量约是第1代的2倍。第1代杉木树干有较大的生物量积累优势,对地下养分空间的竞争力强,而第2代对地上养分空间的竞争力强。各生长级林木生物量分布呈反J形,表明杉木林处于速生阶段时林木竞争才开始,分化不明显。第1代杉木林的生产力是第2代的1.2倍,杉木连栽导致生产力下降。但第2代杉木叶的光合生产率比较高,说明第2代杉木林还有一定的生产潜力可挖掘。

关键词: 杉木人工林, 生物量, 生产力, 代际效应, 速生阶段

Abstract:

Based on the data collected by located observation, the biomass and productivity of the second generation of Chinese fir plantation at fast growing stage was studied. At the same time, a comparison of biomass and productivity between the first generation and the second of successive rotation was made. The results showed that biomass of tree and stands in the first and second rotation Chinese fir plantation were 37.54, 34.74kg and 85.6,71.45 t·hm-2, decreased by 8.52% and 16.53% respectively. The total biomass of the ecosystem in the first and second rotation account for 87.93 and 76.02 t·hm-2, of which trees occupied a large portion. The biomass of shrub, herb and litter in the second rotation was 2 times of that in the first rotation. The first rotation Chinese fir had a stronger competition for underground and higher biomass accumulation in stem, while the second had stronger competition for above ground and lower biomass in stem. Productivity of the second rotation Chinese fir plantation was 6.49 t·hm-2a-1, and lower than that of the first rotation (7.78 t·hm-2a-1). However, the leaves in the second rotation had higher photosynthesis productivity. This case confirmed that there was potential improvement in productivity in the second rotation Chinese fir plantation.

Key words: Chinese fir plantation, Biomass, Productivity, Effect of successive-rotation, Fast growing stage