摘要
对厦门园林植物园的5种榕属植物不同发育阶段叶片的灰分含量、干质量热值与去灰分热值的变化动态进行了初步研究。结果表明:①随着叶片的发育(从幼叶→成熟叶→老叶),灰分含量有升高的趋势,5种植物中老叶灰分含量均不是最低,说明叶片可能具有维持自身营养元素平衡的机制;②5种榕属植物不同发育阶段的叶片中,幼叶含有较高的干质量热值,不同发育阶段的榕属植物叶片干质量热值变化趋势因种而异;③5种榕属植物不同发育阶段叶片的干质量热值与灰分含量具有显著的线性相关(P<0 05);④不同发育阶段叶片去灰分热值的变化趋势因种而异,也不是固定不变的。
Caloric values and ash contents in the leaves at the different growth stages of five Ficus species( Ficus religiosa,F.*'elastica,F.*'laco,F.*'microcarpa cv.Goldenleaves,F.*'microcarpa)are studied.The results are as follows:(1)ash contents increase with the growth of leaves;the relatively high ash contents of old leaves are not the lowest,which indicates that the leaves have a mechanism to maintain the balance of nutritious elements;(2)young leaves have relatively higher gross caloric value than mature and old leaves,gross caloric value in the leaves at the different development stages vary with species;(3)gross caloric values in the leaves at the different development stages have distinct linear correlation with ash contents(P<005);(4)ashfree caloric values in the leaves at the different development stages also vary with species.
出处
《浙江林学院学报》
CSCD
北大核心
2003年第3期264-267,共4页
Journal of Zhejiang Forestry College
基金
福建省建设厅及厦门市市政园林局资助项目(YK 2000 14)
关键词
植物学
榕属
不同发育阶段叶片
热值
灰分
botany
Ficus
leaves at the different development stages
caloric value
ash content
