马尾松一代种子园母树营养特点研究

对马尾松一代种子园母树的针叶和球果的营养元素含量进行测定、分析、比较,结果表明:马尾松种子园母树对氮、钾、钙、磷养分的需求量较大,针叶中各元素含量由高到低依次为NKCaPMgBMo,球果的养分含量为KNCaPMgBMo;种子园母树的针叶、球果中各营养元素含量波动较大;初步得到种子园母树针叶各营养元素含量适宜范围为:N(10.994~13.414 g/kg),P(1.026~1.430 g/kg),K(6.025~15.842 g/kg),Ca(1.784~5.483 g/kg),Mg(0.845~1.233 g/kg),B(28.417~38.854 mg/kg),Mo(1.743~3.012 mg/kg),可作为推测种子园母树营养元素是否分布正常以及种子园施肥和开展配方施肥试验的参考依据之一。

Seed Tree Nutritional Characteristics in Generation Seed Orchard of Pinus massoniana

The content of nutrients in needles and cones of seed tree in generation seed orchard of Pinus massoniana was measured,analyzed and compared in this paper.The results showed that：the seed tree of Pinus massonian has strong nutrient demand on nitrogen,potassium,calcium,phosphorus,each element content in needle leaves are followed descending order as N ＞ K ＞ Ca ＞ P ＞ Mg ＞ B ＞ Mo,nutrient content in cones followed as K ＞ N ＞ Ca ＞ P ＞ Mg ＞ B ＞ Mo; nutrient content in needles leaves and cones of seed tree are varied; nutrient content in needles leaves has been initially measured,appropriate range showed asN （10.994 ～ 13.414g/kg）,P （1.026 ～ 1.430g/kg）,K （6.025 ～ 15.842g/kg）,Ca （1.784 ～ 5.483 g/kg）,Mg （0.845 ～ 1.233 g/kg）,B （28.417 ～ 38.854mg/kg）,Mo （1.743 ～ 3.012 mg/kg）,which could be used as one of reference for fertilization trials and speculating the nutrients distribution status of seed tree in generation seed orchard.