马尾松不同种源矿质营养与生长相关性分析

运用电感耦合等离子直读光谱仪（ＩＣＰ），测定相同立地上马尾松（ＰｉｎｕｓｍａｓｏｎｉａｎａＬａｍｂ．）１０个种源针叶内２５种矿质营养元素含量的变异，分析矿质元素含量与树高、胸径生长量的相关性，认为利用常绿针叶树种休眠期内矿质元素含量的相对稳定性研究马尾松矿质营养水平是可靠的。矿质营养与产地经、纬度呈负相关。广东和广西的种源可作为江苏地区今后推广马尾松的主要种源。马尾松针叶内钙和锌含量可作为马尾松树高和胸径生长量的预测因子。初步认为马尾松属于高钙吸收和高锌利用型树种。

Correlation analysis between mineral nutrition and growth of Pinus massoniana Lamb. from different provenances

Twenty five mineral elements in needles of Pinus massoniana Lamb. from 10 provenances planting in the same place were measured with inductively coupled plasma quantometer (ICP). Correlation between the contents of mineral elements and the growth of height and diameter was analysed. The results indicated that using the stability contents of mineral elements of ever green conifers during dormancy to analyse the level of mineral nutrition of Pinus massoniana Lamb. was reasonable. Mineral nutrition negatively correlated with the latitude and longitude of the provenances. The provenances from Guangdong and Guangxi could be the suitable provenance for planting in Jiangsu. Contents of Ca and Zn in the needles could be the early predication factors for the growth of height and diameter by stepwise analysis. Preliminarily, Pinus massoniana Lamb. was one kind of high Ca absorption and high Zn utilization species.