摘要
在福建平和天马林场 ,对尾叶桉生长过程中营养元素的动态变化进行了为期 5a的研究 .结果表明 ,尾叶桉平均每年胸径增长 2 .46cm ,树高增长 2 .5 0m ,枝、叶、干 (干材和干皮 )和根中 5种主要营养元素的总量 (N +P +K +Ca +Mg)分别为 17.11gkg- 1 、33.38gkg- 1 、9.6 6gkg- 1 和 12 .75gkg- 1 ,平均每年吸收 5种主要营养元素量 338.31kghm- 2 a- 1 ,平均每年纯吸收 5种主要营养元素量 188.2 1kghm- 2 a- 1 ,平均每年归还 5种主要营养元素量 15 0 .10kghm- 2 a- 1 ,平均循环率为 44.37% .表 4参
The dynamics and cycling of nutrient elements in Eucalyptus urophylla was studied for five years (1996 ～2000) during its growing seasons in Tianma State-owned Forestry Farm,Pinghe, Fujian. The results showed that the diameter breast height increased by 2.46 cm and the height by 2.50 m. The sum of five major macronutrients (N +P +K +Ca +Mg) in the branch, leaf, bole (including trunk and bark) and root of Eucalyptus urophylla were 17.11 g kg -1, 33.38 g kg -1, 9.66 g kg -1and 12.75 g kg -1, respectivly. The uptake of the five major macronutrients was 338.31 kg hm -2a -1,the net uptake 188.21 kg hm -2 a -1, and the return 150.10 kg hm -2 a -1. The average cycling rate was 44.37%. Tab 4, Ref 6
出处
《应用与环境生物学报》
CAS
CSCD
2002年第2期148-153,共6页
Chinese Journal of Applied and Environmental Biology
基金
福建省林业厅资助课题 (No.B1 9990 0 2 5)~~
关键词
尾叶桉
营养元素动态
养分循环
Eucalyptus urophylla
dynamics of nutrient elements
cycling of nutrient elements
