Fertilization effect and Application of Diagnosis and Recommendation Integrated System in Container System Seedling Raising of Pinus tabulaeformis
Huang Guang-yuan, Dong Li-fen, QI Fang-mei · Yunnan Forestry Science and Technology · 2004
The experiments on fertilization of Pinus tabulaeformis container seedling were carried out by setting different fertilizer categories and applied grads. Nutrition was diagnosed on one year old seedling through DRIS. The results showed that the second and third level of N fertilizer, namely 0.22 ～ 0.43 g/1 000g medium was good for the height growth of seedlings, the second and third level of P fertilizer, namely 1.0～2.0g/1000g medium was also good for the seedling's height growth. The important parameters of DRIS on one year old Pinus tabulaeformis were N / P? N /K?K/P, their optimum value were 5.792 1, 1.267 3 and 4.723 8 respectively.