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Revista Chapingo serie ciencias forestales y del ambiente
versión On-line ISSN 2007-4018versión impresa ISSN 2007-3828
Resumen
VELAZQUEZ-CASTRO, Iván J. et al. Fertilization of two genetic groups of Pinus patula Schiede ex Schltdl. & Cham. in a four-year progeny trial. Rev. Chapingo ser. cienc. for. ambient [online]. 2022, vol.28, n.1, pp.21-36. Epub 02-Feb-2024. ISSN 2007-4018. https://doi.org/10.5154/r.rchscfa.2020.08.049.
Introduction:
Genetic improvement and nutritional management are used to increase productive capacity.
Objective:
To analyze the effect of traditional and controlled-release fertilizers, as well as the way to define the doses (technically or empirically), on growth of 20 tree families of Pinus patula Schiede ex Schltdl. & Cham.
Materials and methods:
Four fertilization treatments were applied: 1) control; 2) “technical”, based on foliar analysis; 3) controlled release (18-6-12 + 2CaO + 3.5 Mg + 2.1 Si + microelements); and 4) mixture of agricultural fertilizers in nutrient concentrations similar to the controlled-release treatment. Height, diameter, biomass index, number of whorls, leaf mass, and growth initiation and cessation were evaluated in a group of 10 superior and 10 inferior three-year old families in Chignahuapan, Puebla. Data were analyzed with the MIXED procedure of SAS.
Results and discussion:
Trees showed no significant differences in growth, biomass production and growth initiation by fertilization effect, but showed significant differences by genetic quality (P ≤ 0.05). The genotype*fertilization interaction was significant; after one year of controlled-release fertilizer application, inferior genotypes had the highest values of relative rates of biomass production, diameter at root collar and height.
Conclusions:
Controlled-release fertilizers at appropriate doses and environmental conditions are a viable option to promote growth of young P. patula trees in the field.
Palabras llave : controlled-release fertilizer; genotypes; forest nutrition; growth rate; foliar analysis.