贵州都匀马尾松种子园针叶DRIS营养诊断分析

通过对都匀1．5代无性系种子园20年生马尾松针叶中N、P、K、Ca、Mg、Cu、Zn、Fe、Mn、B等营养元素含量变化的测定和分析，初步筛选出N／P、K／N、Ca／N、Mg／N、N／Cu、zn／N、N／Fe、K／P、Ca／P、P／Mg、P／Cu、P／Zn、Fe／P、K／Ca、K／Mg、K／Cu、K／Zn、Fe／K、Ca／Mg、Ca／Cu、Ca／Zn、Fe／Ca、MgJCu、Zn／Mg、Fe／Mg、Zn／Cu、Fe／Cu、Fe／Zn共28对元素比值为重要参数，对贵州都匀马尾松种子园针叶作DRIS营养诊断分析。结果表明，该地区马尾松针叶内Mn含量过高，平均值为767．01mg／kg，而B含量较低，仅为12．95mg／kg，马尾松的需肥顺序为Cu〉P〉Zn〉Mg〉Ca〉N〉K〉Fe。

DRIS Nutrition Diagnosis of Pinus massoniana Needles in Seed Orchard of Duyun,Guizhou Province

Based on the measurement and analysis of the content of nutrient elements including N, P, K, Ca, Mg, Cu, Zn, Fe, Mn, B in the needles of 20 a Pinus massoniana planted in the 1.5 generation clonal seed or- chard of Duyun, totally 28 pairs of element ratios of N/P, K/N, Ca/N, Mg/N, N/Cu, Zn/N, N/Fe, K/P, Ca/P, P/Mg, P/Cu, P/Zn, Fe/P, K/Ca, K/Mg, K/Cu, K/Zn, Fe/K, Ca/Mg, Ca/Cu, Ca/Zn, Fe/Ca, Mg/Cu, Zn/Mg, Fe/Mg, Zn/Cu, Fe/Cu, Fe/Zn are preliminarily selected as the important parameters to es- tablish the DRIS nutrition diagnose. The results show that the content of Mn is relatively high with an average of 767.01 mg/kg, while the content of B is lower, only 12.95 mg/kg. The sequence of nutrition requirements by P. massoniana is Cu 〉 P 〉 Zn 〉 Mg 〉 Ca 〉 N 〉 K 〉 Fe.