不同树龄脐橙次生果黄化与树体矿质营养关系初探

通过对不同树龄脐橙树体N、P、K、Ca、Mg、Fe、Mn、Cu、Zn等养分的测定表明:花、幼果及叶片中Ca含量是树龄长的树高于或显著高于树龄短的树;N、K含量则相反,是树龄短的树高于或显著高于树龄长的树;其它养分差异不显著。幼树初投产脐橙次生果黄化的高发生率与树体钙营养失调密切相关。

PRELIMINARY STUD-IES OF THE RELATION BETWEEN XANTHOCHROISM OF SECONDARY FRUI OF NAVEL ORANGE IN DIFFERENT AGE AND MINERAL NUTRITION IN THE TREE

The nutrition ingredient determination of N, P, K, Ca, Mg, Fe, Mn, Cu, Zn in the navel orange trees of different ages shows as fallows: the content of Ca in flower, young fruit and leaf blade for the old tree is larger or much larger than that for the young one; on the contrary, the content of N and K in them for the young tree is larger or much larger than that for the old one; the diversity of the othern utrition ingredients is not obvious. For the first bearing fruit tree, high rate of generation of xanthochroism of secondary fruit of the navel orange is closely concerned with nutrition disorder of Ca in the tree.