慈竹无性系种群能值特点及其影响能值计测因素的研究

STUDIES ON THE FEATURES OF ENERGY VALUE AND THE FACTORS OF AFFECTING MEASURING ENERGY VALUE OF NEOSINOCALAMUS AFFINIS CLONE POPULATION

本文引用Harper(1977)的构件结构理论,从构件结构单位、无性系分株和无性系三个层次,对四川南充市郊慈竹无性系种群的能值特点及其影响能值的计测因素进行了定量研究。研究结果表明:慈竹无性系种群中,各构件单位的去灰分热值(AFCV)分别为:根15349.42J/g、根茎16372.92J/g、秆17106.06J/g、枝18111.99J/g和叶19451.90J/g;慈竹无性系分株的AFCV(J/g)随龄级增大而递增;慈竹无性系水平上的AFCV为:Ⅰ龄占16.47%、Ⅱ龄占25.76%、Ⅲ龄占36.32%、Ⅳ龄为13.08%及V龄为8.37%。用恒容燃烧法测定热值时,其能值变化与氧分压密切相关。用经验公式计算的能值较作图法高;用AFCV表示能值较总干重热值(GCV)准确。

This paper is based on the theory of Harper's(1977) modular structure, explored the features of energy value and the method of measuring energy value of Neosinocalamus affinis clone population in the surburbs of Nanchong at three levels: the unit of modular construction, the ramet and the clone.In the Neosinocalamus affinis clone population, the mean AFCV of each unit of modular construction is as follows:root 15349.42J/g, rhizome 16372.92 J/g, culm 17106.06J/g, branch 18111.99J/g and leaf 19451.90J/g;the AFCV of the ramets of Neosinocalamus affinis is increasing with age class; the allocation to the total energy (AFCV) at the ramet level are that 1 age class is 16.47%, 2 age class is 25.76%, 3 age class is 36.32%, 4 age class is 13.08% and 5 age class is 8.37%. The changes of the energy value are related to the oxygen pressure in the oxygen bomb calorimeter, which measures thermal value with combustion method at constant volume. The energy value calculated with the experience formula is bigger than with the Way of Leiro check curve; It is more accurate if the energy is expressed with AFCV than GCV, and the AFCV is bigger than the GCV.