栓皮栎磷素营养动态及转移规律

对45年生栓皮栎磷素营养动态及转移规律进行了研究，结果表明：栓皮栎树干、枝、叶、皮、根等器官中的磷素含量均随季节发生变化，且幼嫩组织变化幅度较老组织大。栓皮栎树叶在凋落前转移出的磷为9.542kg/hm^2，占地上部分转移总量的52.57％；树干每年迁入磷素高达6.909kg/hm^2。根系生长过程中，磷素含量出现锐减而形成的含量曲线呈“V形谷主”，该“V形谷”可作为林木营养诊断和合理施肥的重要参考。

The Nutrient Variation and Internal Transfer of Phosphorus in Quercus variabilis

This paper focuses on the nutrient variation and internal transfer of phosphorus in 45-year-old Quercus variabilis . The main results show that the concentrations of phosphorus in the trunk, branches, leaves, bark and roots of the tree fluctuate seasonally. As an important organ to transfer nutrient, the leaves transfer 9.542 kg/hm 2 of phosphorus to other organs before withering and falling. There is 6.909 kg/hm 2 of phosphorus from other organs to the trunk of the tree every year. These are important for conserving nutrients effectively and keeping forest growing. In addition, during the growing season, the concentrations of phosphorus in the roots decrease rapidly, which make the concentration curve of phosphorus form the shape of letter V, this shape can be regarded as a reference that is of great importance to forest nutrient diagnosis and rational application of fertilizer.