为了探明红皮云杉（Picea koraiensis Nakai）的限制性营养元素和合理施肥措施，对胡桃楸（Juglans mandshurica Maxim.）-红皮云杉混交林、水曲柳（Fraxinus mandshurica Rupr.）-红皮云杉混交林、黄檗（Phellodendron amurense Rupr.）-红皮云杉混交林和红皮云杉纯林中红皮云杉的针叶C、N和P含量以及C∶N、C∶P和N∶P的变化进行了比较，并对其变异和相关性进行了分析。结果表明：4种林分中红皮云杉的针叶C含量呈“升高—降低”的趋势，且在5月份最低、在8月份最高；4种林分中红皮云杉的针叶N和P含量大多呈“降低—升高—降低”的趋势，且在5月份最高、在9月份最低。胡桃楸-红皮云杉混交林和黄檗-红皮云杉混交林中红皮云杉的针叶C∶N、C∶P和N∶P持续升高，而其余2种林分中这3个指标呈“升高—降低—升高”的趋势，且4种林分中这3个指标在5月份最低、在9月份最高。比较而言，4种林分中红皮云杉的针叶C含量变异系数最小（5.02%~6.17%），而C∶P变异系数最大（16.59%~23.46%）。3种混交林中红皮云杉的针叶N∶P在5月份至6月份小于14，在7月份至8月份介于14~16，在9月份大于16；而红皮云杉纯林中红皮云杉的针叶N∶P则在5月份至8月份介于14~16，在9月份大于16。相关性分析结果表明：4种林分中红皮云杉的针叶C含量与N和P含量呈显著或极显著负相关；N含量与P含量呈极显著正相关；C∶N和C∶P与N和P含量呈负相关，且多数相关性显著。研究结果显示：总体来看，4种林分中红皮云杉生长在5月份至6月份受N限制，在7月份至8月份受N和P共同限制，在9月份受P限制，因此，建议在5月份至6月份施加氮肥，在7月份至8月份同时施加氮肥和磷肥。

In order to explore restrictive nutrition elements and reasonable fertilization measures of Picea koraiensis Nakai， changes in C， N and P contents and C∶N， C∶P and N∶P in needles of P. koraiensis in Juglans mandshurica Maxim.-P. koraiensis mixed forest， Fraxinus mandshurica Rupr.-P. koraiensis mixed forest， Phellodendron amurense Rupr.-P. koraiensis mixed forest and P. koraiensis pure forest were compared， and their variations and correlations were analyzed. The results show that C content in needles of P. koraiensis in four stands shows a trend of “increasing-decreasing”， and reaches the lowest in May and the highest in August. N and P contents in needles of P. koraiensis in four stands mostly show a trend of “decreasing-increasing-decreasing”， and reach the highest in May and the lowest in September. C∶N， C∶P， and N∶P in needles of P. koraiensis in J. mandshurica-P. koraiensis mixed forest and P. amurense-P. koraiensis mixed forest increase gradually， while these three indexes in other two stands show a trend of “increasing-decreasing-increasing”， and these three indexes in four stands reach the lowest in May and the highest in September. In comparison， the coefficient of variation of C content in needles of P. koraiensis in four stands is the smallest （5.02%-6.17%）， while that of C∶P is the largest （16.59%-23.46%）. N∶P in needles of P. koraiensis in three mixed forests is less than 14 from May to June， between 14-16 from July to August， and greater than 16 in September； while that in needles of P. koraiensis in P. koraiensis pure forest is between 14-16 from May to August， and greater than 16 in September. The correlation analysis result shows that C content in needles of P. koraiensis in four stands shows a significant or extremely significant negative correlation with N and P contents； N content shows an extremely significant positive correlation with P content； C∶N and C∶P show negative correlations with N and P contents， and most correlations are significant. It is suggested that overall， the growth of P. koraiensis in four stands is limited by N from May to June， commonly limited by N and P from July to August， and limited by P in September. Therefore， it is recommended to apply nitrogen fertilizer from May to June and simultaneously apply nitrogen and phosphate fertilizers from July to August.