ISSN 2756-3413
African Journal of Virology Research ISSN 2756-3413 Vol. 20 (2), pp. 001-010, February, 2026. Available online at www.internationalscholarsjournals.org © International Scholars Journals
Full Length Research Paper
Impact of Macronutrient Deficiencies on Growth and Biometric Parameters of Cedar Seedlings (Acrocarpus fraxinifolius)
João Faustino Munguambe1, Nelson Venturin1*, Maria Ligia de Souza Silva1, Leandro Carlos2, Diana Suzete Nunes da silva1, Elias de Sá Farias1, Lucas Amaral de Melo1, Renato Luiz Grisi Macedo1 and Mateus José Comé3
1Department of Forest Science, Federal University of Lavras, State of Minas Gerais, Brazil.
2Goiano Federal Institute, Rio Verde, State of Goias, Brazil.
3Cashew Promotion Institute (INCAJU), Mozambique.
Accepted 6 October, 202025
The purpose of this work was to assess biometric parameters of cedar seedlings (Acrocarpus fraxinifolius) associated with visual symptomatology of macronutrients deficiency, growth rate, and content and accumulation of nutrients in aerial parts of seedlings grown in nutritive solution. The trial was established in completely randomized design with seven treatments, four replications, and one plant per pot. Treatments consisted of complete nutrient solution, Hoagland and Arnon, and deprivation of the following selected single nutrients: N, P, K, Ca, Mg and S. Micronutrients were provided to all treatments. The following biometric parameters were assessed 90 days after the transplant: shoot height, root collar diameter, root and shoot dry weight. The Dickson index and the ratio given by roots dry weight and shoot dry weight were obtained, as well as the content and accumulation of nutrients in aerial parts of seedlings. The Sisvar statistical analysis system was run for analysis of variance, and averages were compared by means of Scott-Knott test at 5% significance. Treatments consisting of omissions of macronutrients were found to be limiting factors of plants growth and obtaining of seedlings shoot dry weight in the following order: N > P > K > Ca > Mg > S. Deficiencies of these macronutrients caused visible morphological abnormalities, where common symptoms of deficiency of N, P, K and Ca appeared before symptoms of deficiency of Mg and S. The content of nutrients found in aerial parts of seedlings of A. fraxinifolius grown in nutritive solution was greater for treatments consisting of deprivation of N, P and K. The content of nutrients found for treatments consisting of deprivation of Mg and S was not significantly different from that found for the complete nutrients solution.
Key words: Nutritional requirements, forest nutrition, Indian cedar.