| 【Objective】With Camellia japonica seedlings as the test material, the effects of different levels of nitrogen, phosphorus, potassium, organic carbon fertilizer and other factors on the vegetative growth of Camellia were studied, and the most suitable nutritional formula for C. japonica substrate cultivation was screened out.【Method】Pot experiments were carried out with different nutritional formulas（on the basis of conventional fertilizer and organic carbon fertilizer, nine nutritional formulas with different ratios of high nitrogen, high phosphorus and high potassium were set, and controlledrelease fertilizer was used as the control）during the vegetative growth stage of C.japonica【Result】Nutritional formula T3 had the highest growth indicators such as plant height, number of branches, crown width, base thickness, dry matter weight, and total root length. Nutritional formula T7 had the highest growth indexes such as leaf number and root surface area, and other growth indexes were close to those of T3, and there was no significant difference. All growth indicators of the two nutritional
formulas were significantly higher than those of T1. Plants with T3 and T7 absorbed more nitrogen, phosphorus, potassium, and their individual plant’s absorption of nitrogen, phosphorus and potassium were all at high levels. The utilization rates of nitrogen and potassium in T3 were both at the highest level, and the utilization rate of phosphorus was close to the average. The nitrogen utilization rate of T7 was high, and the phosphorus and potassium utilization rates were close to the average.【Conclusion】The most suitable nutritional formula for the cultivation of C. japonica substrate was: high-phosphorus fertilizer ∶ organic carbon fertilizer=1 ∶ 2（combined application of organic and inorganic fertilizer, N ∶ P2O5 ∶ K2O ∶ C=1.0 ∶ 1.8 ∶ 2.6 ∶ 9.3）and high potassium fertilizer（combined application with inorganic nutrition, N ∶ P2O5 ∶ K2O=1.0 ∶ 0.6 ∶ 4.3）.. |
