| 摘要: |
| 【目的】分析不同产脂类型马尾松的养分含量差异，探讨养分含量与产脂量的关系，为马尾松产脂林的科学施肥提供理论依据。【方法】以广西凭祥26年生马尾松人工林为研究对象，分析不同产脂类型（低产脂类型和高产脂类型）马尾松针叶、枝、皮的N、P、K、Ca、Mg含量及其变化情况，运用方差分析及相关性分析，揭示不同产脂类型马尾松的养分含量与产脂量的相关性。【结果】(1)N、K、Ca含量在马尾松不同器官间差异显著，而P和Mg含量差异不显著；针叶中N、P、K、Mg含量最高，皮中Ca含量最高。(2) 在1年针叶和2年针叶中，各养分含量表现为N>K>Ca>Mg>P，1年针叶和2年针叶N、K、Ca、Mg含量在不同产脂类型马尾松间差异显著；除N含量是低产脂类型高于高产脂类型外，P、K、Ca、Mg含量均是低产脂类型低于高产脂类型。(3) 在不同产脂类型马尾松间，枝和皮的养分含量均表现为Ca>N>K>Mg>P，Ca含量在不同产脂类型间差异显著，N、P、K、Mg含量差异不显著，5种养分含量均表现为低产脂类型低于高产脂类型。(4) 马尾松产脂量与1年针叶和2年针叶养分含量关系密切，其中与K、Ca、Mg含量呈极显著正相关，与N含量呈极显著负相关。【结论】不同产脂类型马尾松的养分特点不同，养分含量对产脂量存在影响。与产脂量相关性较高的是1年针叶和2年针叶K、Ca、Mg、N含量。 |
| 关键词: 马尾松 林木养分 产脂量 针叶林 |
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| 基金项目:“十三五”国家重点研发计划项目（2017YFD0600302，2017YFD0600304）；“十二五”国家科技支撑项目(2015BAD09B0102-3)；广西友谊关森林生态系统国家定位观测站基金项目 |
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| Nutrient characteristics of Pinus massoniana plantations and the relationship with resin yields |
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AN Ning,JIA Hongyan,CHEN Honghui,et al
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| Abstract: |
| 【Objective】The nutrient characteristics of different resin individuals of Pinus massoniana and the relationship between nutrient characteristics and resin yields were analyzed to provide theoretical basis for scientific fertilization.【Method】The 26 years old plantations of P. massoniana in Pingxiang,Guangxi were selected to analyze the contents of N,P,K,Ca and Mg in needle,branch,and bark in trees with different resin yields.Using variance analysis and correlation analysis,the correlations between nutrient characteristics and resin yields were also investigated.【Result】There were significant differences in contents of N,K and Ca in different organs,while contents of P and Mg were not significantly different.The contents of N,P,K and Mg in the needles were the highest,while bark had the highest Ca.Nutrient contents in needles were in the order of N>K>Ca>Mg>P.The concentrations of N,K,Ca and Mg in 1 year old and 2 years old needles were significantly different among trees with different resin yields. The content of N in type with low resin yield was higher than that in type with high resin yield,while the contents of P,K,Ca,and Mg were opposite.The orders of nutrients in branch and bark were in the same order of Ca>N>K>Mg>P.The content of Ca was significant different among trees with different resin yields,while N,P,K and Mg showed no significant difference.The contents of these 5 nutrients had the same characteristic of having lower concentrations in trees with low resin yield.The resin yields were closely related to the nutrient contents of 1 year old and 2 years old needles.The resin yield had significantly positive relationships with K,Ca and Mg,but significantly negative relationship with N.【Conclusion】The nutrient characteristics of different resin individuals of P. massoniana were different,and the nutrient characteristics had effect on resin yields.The content of K,N,Ca and Mg in 1 year old and 2 years old needle had high correlation with resin yields. |
| Key words: Pinus massoniana forest nutrient resin yield coniferous forest |
