鸭梨叶内矿质元素含量标准值的制定

Drawing-up of Standard Values of Mineral Element Contents in Leaves of "YALI" Pear

在鸭梨原产地及主产区的38个果园采叶样55个,化验了N、P、K、Ca、Mg、Fe、Mn、Zn、B、Cu十个元素的含量;通过相关检验及复回归统计,以大于10年生树叶内矿质元素含量的复回归值平均数及离回归标准误制定鸭梨叶内矿质元素含量标准值及变异范围.小于10年生的结果树叶内P、K、Mg、Mn、Zn含量具有特殊性.相同条件下雪花梨叶内的 N、P、K、Ca、Mg、Mn含量比鸭梨高.鸭梨叶诊断的适宜取叶期为花后70～90天.

Fifty-five leaf samples were adopted from thirty-eight pear orchards in the original growing and main producing areas of "YALI" pear, and contents of ten elements (N, P, K, Ca, Mg, Fe, Mn, Zn, B, Cu ) were analyzed. The standard values of mineral element contents in the " YALI " pear leaves and their variable ranges were drawn up in the light of the mean of multiple regression values and standard errors from the regression of the mineral element contents in the leaves of "YALI" pear growing over ten years through the correlation test and multiple regression statistics. The contents of P, K, Mg, Mn, Zn in the leaves of fruiting pear trees under ten years were distict from that in the older trees. The contents of N, P, K, Ca, Mg and Mn in the leaves of "HSUEHUA" pear were higher than that in the leaves of "YALI" pear under the same condition. The sampling stage suitable to " YALI " pear for diagnosis is 70-90 days after flowering.