缙云山常绿阔叶林四川大头茶果实中矿质营养元素含量及季节动态

本文测定了缙云山常绿阔叶林中四川大头茶果实中Ｎ，Ｐ，Ｋ，Ｃａ，Ｍｇ，Ｃｕ，Ｚｎ，Ｆｅ，Ｍｎ９种矿质营养元素的含量，研究了这些元素的季节吸收特点与繁殖分配，并探讨了这些元素与某些土壤化学因素之间的关系，结果表明：四川大头茶果实在生长期内矿质营养元素含量随季节而变化，各元素平均含量顺序为：Ｎ＞Ｋ＞Ｃａ＞Ｍｇ＞Ｐ＞Ｍｎ＞Ｆｅ＞Ｚｎ＞Ｃｕ。土壤中化学因子与四川大头茶果实中常量元素含量之间的关系密切，果实中Ｎ含量受土壤中Ｎ，Ｐ，Ｋ含量的综合影响，土壤有机质最终会影响到果实中Ｎ，Ｐ，Ｋ，Ｃａ的吸收，矿质元素的果实繁殖分配量与果实净生物生产量分配之间不存在特定的比例关系。果实元素分配所占比例的大小顺序为Ｐ＞Ｎ＞Ｋ＞Ｃａ＞Ｆｅ＞Ｍｇ＞Ｍｎ＞Ｚｎ＞Ｃｕ。

CONTENTS AND SEASONAL DYNAMICS OF MINERAL ELEMENTS IN FRUIT OF GORDONIA ACUMINATA EVERGREEN BROAD LEAVED FOREST OF JINYUN MOUNTAIN

Contents of nine mineral elements (N,P,K,Ca,Mg,Cu,Zn,Fe,and Mn) in fruit of Gordonia acuminata evergreen broad leaved forest of Jinyun Mountain were analysed,and seasonal absorbed features and reproductive allocation of these elements in growing season were investigated.We studied the relation ships between the contents of these elements and chemical factors in the soil of forest.The results showed that the mineral elements in Gacuminata fruits variatied with season.The average contents of these elements were N>K>Ca>Mg>P>Mn>Fe>Zn>Cu.There were close relationships between the chemical factors in soil and mineral elements contents in fruits.The N contents in fruits were comprehensive effected by N,P,and K content in the soil.The absorbing of M,P,K,Cain fruitwere also effected by the organic matter in the soil.There were no percentage relations between reproductive allocation of mineral elements and reproductive allocation of net primary production for fruit.The percentage of mineral elements were P>N>K>Cu>Fe>Mg>Mn>Zn>Ca.