Exponential Fertilization Regimes Improved Growth and Nutrient Status of Quercus nuttallii Container Seedlings

Background: The conventional fertilization regime ignores the allometric characteristics of Quercus nuttallii seedlings, challenging them to meet nutritional needs at each growth stage. This study was conducted determine impact exponential on and nutrient status Q. container seedlings. Methods: Two regimes (average/exponential) were performed varied gradients (0, 300, 500, 700, 900 mg/seedling) N supply set for two regimes. Result: application promoted seedling height, root collar diameter, total biomass, N/P/K accumulation nuttallii, obtained better effects in general. An appropriate amount exponentially beneficial system, whereas excessive dosages inhibited it. Judging from seedlings accumulation, mg/seedling under adequate However, 500 700 may have advantages improving seedlings’ stress resistance. Conclusions: Exponential did not only requirements promote but also facilitated indirectly accelerate assimilation N/P/K, therefore afforestation quality.