Omissão de macronutrientes e micronutrientes em mudas de mogno africano (Khaya ivorensis A. Chev)

Abstract

Belya, belonging to the Meliaceae family, native to western Africa to Khaya ivorensis A. Chev, popularly known as African mahogany. years, being characterized as a long-term investment, more guaranteed return, growing its cultivation in the country. This study aimed to conduct a study with this species to evaluate the effect of nutrient omission on the growth and symptoms of mineral deficiency in African mahogany seedlings, aiming to identify its nutritional requirements. For this, we used the technique of subtraction diagnosis, which allows identifying the nutritional requirements of the species under study and subsequently find ways to overcome this deficiency. The experimental design adopted was completely randomized with 13 treatments and four replications, consisting of absolute Witness, complete solution, omission of the following nutrients: (-Caling), (–N), (-P), (-S), ( -B), (-Cu), (-Fe), -Mn), (T11), (-Mo), (-Zn). Treatments -P, -Mo and -Zn showed the first visual symptoms of deficiency. The treatments that most affected Height were Test. and -P. The diameter was smaller than the Test treatments. -P, -Calg, -K and Cu. The TC was lower in the treatments -P, -Mo, -N, -Cu and -Fe. The treatments that showed the most significant reduction in the evaluated parameters were Test, (-P) and (-Mo).