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以湖南省湘潭县湿地松不同配方施肥试验为研究对象，于不同生长季节分别在施肥区和对照区采集针叶进行Ｎ，Ｐ，Ｋ，Ｃａ，Ｍｇ养分动态分析，并将各生长季节元素含量与树高、胸径进行相关性统计分析。结果表明：营养元素Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ含量在不同生长季节变化是不同的。Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ含量在生长初期最高，Ｎ、Ｐ９月最低，Ｋ、Ｃａ、Ｍｇ速生期最低，Ｃａ生长末期最高。ＮＰ、Ｋ、Ｍｇ含量在生长季节逐渐减少，Ｃａ则逐渐递增。叶片中Ｎ、Ｐ、Ｍｇ含量在生长初期，速生期，末期与湿地松树高，胸径生长显著相关。
Taking different formulations fertilization experiment of Pinus elliottii in Xiangtan County of Hunan Province as the research object, the nutrient contents of N, P, K, Ca and Mg in the fertilization and control areas were collected in different growing seasons. The nutrient contents of each growth season And tree height, DBH correlation statistical analysis. The results showed that the contents of N, P, K, Ca and Mg in different growing season were different. The contents of N, P, K, Ca and Mg were the highest in the early growing stage, the lowest in N and P9, the lowest in K, Ca and Mg, and the highest in late growing stage. The contents of NP, K and Mg decreased gradually during the growing season, while Ca gradually increased. The contents of N, P and Mg in leaves were significantly correlated with the height and DBH of early stage, fast growing stage and end stage of Pinus elliottii.