Concentration and accumulation of micronutrients in robust coffee

Abstract

Knowledge on the dynamics of micronutrients in coffee tree assists nutritional diagnosis and fertilization management. Therefore, the objective of this study was to evaluate the concentration and accumulation of micronutrients in the leaves and fruits of Coffea canephora. The experiment was managed in crops propagated for 2.5 years in a split-plot-in-time scheme in which the main plots consisted of fertilized and not-fertilized plants, and the subplots stipulated the evaluation periods. The berries and leaves were collected every 28 days, starting from the first flowering to full maturity. The micronutrient content was determined by laboratory chemical analysis, and the accumulation of nutrients in the fruit (mg) was calculated by multiplying the dry matter of the berry (g) × nutrient concentration (mg kg−1). The results showed that fertilization infers the zinc concentration in the fruits and the concentration for manganese, iron and zinc in the leaves in the determined periods. Micronutrient accumulation curves followed the simple sigmoidal model, with accumulation increasing considerably as a function of fruit growth. Thus, fertilization based on micronutrients must be divided over stages with higher accumulation rates, considering the specific requirement of each nutrient.

Concentration of Nutrients in Leaves, Flowers, and Fruits of Genotypes of Coffea canephora

“…In most micronutrients (Fe, Zn, B, and Mn), lower levels in the first seasons (fruit set phase) and a high range could be verified, characterized as expansion and seed filling of the fruits. This behavior is characteristic of conilon coffee trees in Brazil, as already observed in studies in the northern region of Espírito Santo [3] and the Western Amazon [37].…”

“…In studies with coffee trees in the Western Amazon, Dubberstein et al [37] noted that Cu showed slight variation and linear behavior, remaining constant since the first evaluation. This characteristic situation of Cu also occurred in the present study.…”

Root Trait Variability in Coffea canephora Genotypes and Its Relation to Plant Height and Crop Yield

“…Several studies have addressed this topic in order to identify elite genotypes of C. canephora [9,12,13]. Current studies have focused on morphological and agronomical traits, leaf anatomy, and nutritional aspects, aiming not only to identify genotypes with higher yields per se, but also genotypes with higher adaptability and stability in conditions of abiotic stresses [14][15][16][17].…”

Acúmulo De Nutrientes Nos Frutos E Teor Foliar De Pimenta Malagueta (Capsicum Frutescens) Sob Diferentes Manejos De Adubação Fosfatada / Accumulation of Nutrients in Fruits and Foliar Content of Chilly Pepper (Capsicum Frutescens) Under Different Management of Phosphate Fertilization

“…Médias seguidas pela mesma letra na coluna não diferem entre si pelo teste de Scott Knott a 5% de probabilidade de erro. Covre et al (2018) e Dubberstein et al (2019) também observaram maior acúmulo de Fe entre todos os micronutrientes em frutos de café Robusta. Acredita-se que, esse maior acúmulo de Fe, está relacionado às suas importantes funções nas plantas, em que aproximadamente 80% do Fe ocorre nos cloroplastos, onde tem um papel importante na fotossíntese e biossíntese de proteínas e clorofila, é um constituinte enzimático de diversas proteínas, tais como, as hemeproteínas e ferrosulfoproteínas, além de enzimas, como as lipoxigenases (BRAGANÇA et al, 2007).…”

“…Após esse processo, as folhas e frutos foram moídos em moinho tipo Willey com peneira de 40 mesh e submetidas a análises químicas. Para determinação do teor de P nas folhas e frutos, foi realizada a digestão em ácido nítrico (HNO3), em sistema fechado em forno micro-ondas, segundo metodologia descrita em Empresa Brasileira de PesquisaAgropecuária -EMBRAPA (2009). O K foi determinado por fotometria de chama.…”