Impact of Climatic Factors on Radial Growth in Walnut (Juglans regia L.)

Sina N. COSMULESCU; Mariana  BÎRSANU IONESCU; Constantin  NETOIU

doi:10.15835/nsb11210492

Authors

Sina N. COSMULESCU University of Craiova, Horticulture Faculty, Department of Horticulture & Food Science, 13 A.I. Cuza Street, 200585 Craiova (RO) https://orcid.org/0000-0002-9737-2956
Mariana BÎRSANU IONESCU University of Craiova, Horticulture Faculty, Doctoral School of Plant and Animal Resources Engineering, 13 A.I. Cuza Street, 200585 Craiova (RO)
Constantin NETOIU INCDS “Marin Dracea” Craiova, 24 George Enescu Street, Craiova (RO)

DOI:

https://doi.org/10.15835/nsb11210492

Keywords:

climatic factor; radial growth; walnut

Abstract

Walnut is a species of high vigour, with relatively slow growth, and the size of trees grows with each year of growth. Accumulation of wood biomass, and respectively, productivity, is a resultant synthesis of physiological processes and interaction of trees with environmental factors. The authors have assessed growth characteristics of genotypes standing on their own roots in the sands area of Oltenia (Romania). In terms of tree height, it ranged from 8.53 m to 18.00 m, while trunk circumference varied between 40 cm and 229 cm, in genotypes with ages between the 16 and 44 years. Environmental factors, by influencing cambium tissue activity, cell differentiation processes, cell walls growth processes, are inducing particular characteristics of annual rings, in terms of size. The average value of growth ring was 7.09 mm, with a minimum of 3.53 mm, a maximum of 13.94 mm and variation coefficient of 40.20%. The obtained results show that climatic and edaphic factors of the culture area are influencing the trees growth and development and indicate a good adaptability of genotypes to these conditions.

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