綿向山山麓にあるヒノキ林のリターフォールの年変化とこれに影響する要因

概要

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This paper is dealt with the factors affecting the annual fluctuations of litter fall rates in Chamaecyparis forest mentioned in the previous papers. Leaffall rate over 10 years ranged from 1.966 to 5.070 t ha^<-1> y^<-1>. It suggests that leaffall rate or death rate of older leaves is related to the leaf production rate, considering the high correlation between leaffall rate and daily accumulative temperature. However, there are no clear relations between leaffall rate and the accumulative temperature of the year in which dead leaves were produced. High production rates of reproductive organs are found in the year of the high accumulative temperature during flower bud differentiation. Concerning dryness and high temperature in rainy season or in summer, it is shown that the production rates of reproductive organs varies greatly for precipitation or its daily pattern. The number of years necessary for the accurate estimation of mean fall rate in the studied forest is 5 for the total litter, 6 for the leaf, 13-17 for the branch and bark, 51 for the cone and seed, and 119 for the male flower.
日本生態学会の論文
1981-06-30