Abstract

CERVANTES-MACHUCA, María Mercedes et al. Morphological quality of seedlings of Pinus patula var. longepedunculata y P. pseudostrobus var. oaxacana under fertigation. Ecosistemas y recur. agropecuarios [online]. 2025, vol.12, n.spe5, e4630.  Epub Feb 20, 2026. ISSN 2007-901X.  https://doi.org/10.19136/era.a12nv.4630.

Within nursery plant reproduction, quality is the main factor that influences the success of reforestation and forest plantations programs. The objective was to evaluate, under nursery conditions, the morphological quality of Pinus patula var. longepedunculata and P. pseudostrobus var. oaxacana seedlings produced with different concentrations of fertigation. The was carried transplant of 120 seedlings per species out in 25×35 cm polyethylene bags and 120 seedlings in tubes per species. A completely randomized design with a 6×2×2 factorial arrangement was used (24 treatments with 20 repetitions); at two months of age they were fertigated with Steiner's universal solution at 20, 40, 60, 80 and 100%. Every 30 days they were measured: height (cm) and diameter at the root collar (mm) and destructive sampling was carried out on two plants for four months to determine the slenderness index (IE), height/root length ratio (ALR), aboveground biomass/root biomass ratio (RBIO) and the Dickson Index (ICD). P. patula presented an increase in leaf area of 2.73 cm2 from three to six months; on the other hand, for P. pseudostrobus it was 2.24 cm2. By using a larger container, leaf area increased by 4.02 cm2 and fertigation stood out at 60, 40 and 20% with medium and high quality indicators. Fertilization and container volume determine the optimal ratio between aboveground biomass and root biomass of the plant.

Keywords : Growth; increase; Pinus patula; Pinus pseudostrobus; Steiner solution.

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