摘要
柠檬桉(Eucalyptus citriodora Hook.)是速生丰产优良树种,9年生单株材积可达0.3141m^3,树干通直,出材率高,为我国南方重要的造林树种。蚬木(Burretiodendron hsienmu Chun et How)是广西三大硬木之一,质重坚硬,为珍贵用材树种,生长较慢,9年生单株材积仅有0.00978m^3。测定这两树种的光合特性及其与其它生理指标的相关性,分析树木速生与慢生的原因,无疑有助于指导营林生产、改良栽培措施、提高树木的光合生产力和经济产量。
The results of the determination are as follows: 1. The photosynthetic rate of E. citriodora is 58.8％ (half leaf method) and 25.3％ (warburg microrespirometer method) higher than that of B. hsienmu. The respiratory intensity of B. hsienrnu is 3.2 times (half leaf method) and 1.3 time (warburg microrespirometer method) as high as that of E. citriodora. The rate of photorespiration of B. hsienrnu is 70.3 times as high as that of E. citriodira. 2. The efficiency of the dry matter accumulation of E. citriodora is higher than that of B. hsienmu. 3. The cell biological characteristics (structure of leaves, amount of stomata, thickness of leaves, layers and thickness of palisade cell, density of palisade cell etc. ) of E. citriodora are more advantageous to the photosynthesis than that of B. hsienmu. 4. There are positive correlations between chlorophyll contents and net photosynthesis rate in two tree species. 5. There are positive correlations between N contents, soluble protein of leaves and net photosynthesis rate in two tree species. 6. Efficiency of N utilization for E. citriodora is 15.4％ higher than that of B. hsienmu.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1990年第2期162-166,共5页
Scientia Silvae Sinicae
关键词
柠檬桉
蚬木
光合特性
Eucalyptus citriodora
Burretiodendron hsienmu
Photosynthetic characteistics
