EFECTO DE LA FERTILIZACIÓN EN LA PRODUCCIÓN DE PLANTA DE Pinus engelmannii Carr. EN VIVERO

Abstract

The objective of this study was to assess the effect of seven fertilizer combinations and one control on the survival, growth and nutrient assimilation of seedlings of Pinus engelmannii Carr., grown in nursery conditions. The seven fertilizer combinations were applied at each seedling growth phase: establishment, fast growth and preconditioning. A control and two commercial fertilizers were used to test for fertilization effect. . Multicote ™ and Peters Professional™, single and combined, were applied. Multicote™ was used at doses of 5 kg m·3. Peters Professional™ was applied at three fertilization routines with different nitrogen (N), phosphorus (P) and potassium (K) doses accordingly to each seedling growth phase. After five and half months, it was found that the best results corresponded to the-Peters Professional™ at doses of 50:125:101, 100: 15:79 and 40: 109:290 N-P-K ppm, respectively, applied at each seedling growth phases and the combination of Multicote™ and Peters Professional™ applied at three fertilization routines. The control had the poorest seedling quality. Nutrient assimilation was appropriate for most of the treatments except for. the control and Multicote rM applied separated. Base on the results Peters Professional™ is recommended, because less fertilization is applied.