Acumulação de matéria seca pelo cafeeiro conilon

Abstract

RESUMOCom o objetivo de caracterizar a acumulação de matéria seca pelo cafeeiro conilon (Coffea canephora Pierre), um experimento foi conduzido em Marilândia/ES, no delineamento de blocos casualizados, com 24 tratamentos (época de amostragem) e três repetições. Utilizou-se a variedade clonal EMCAPA 8111, plantada em outubro de 1995. Constatouse que o cafeeiro conilon apresentou padrão sigmoidal de crescimento até os seis anos de idade, com acumulação crescente de massa de matéria seca. Houve declínio na taxa de crescimento absoluto após 48 meses de idade e diminuição na taxa de crescimento relativo após o primeiro mês de idade.Palavras-chave: Análise de crescimento, Coffea canephora, partição, taxa de crescimento absoluto, taxa de crescimento relativo. ABSTRACT Dry matter accumulation by Conilon coffeeThe objective of this study was to characterize the dry matter accumulation of Conilon (Coffea canephora Pierre) coffee plants. The experiment was conducted in Marilândia/ES, Brazil, in an orchard with the clone 02, from the clonal variety EMCAPA 8111, established in October 1995. The experiment was arranged in a randomized block design, with twenty-four treatments (date of sampling) and three repetitions. It was found that up to six years of cultivation, plants of Conilon coffee show a sigmoid growth pattern, with a continuous increase in dry matter accumulation. There was a decline in the absolute growth rate after 48 months of cultivation, whereas for the relative growth rate, the reductions were observed after only one month of cultivation.

Growth and nutrient uptake patterns in plants of Duboisia sp

“…At 324 days, the branches accounted for 77% of the DPAP, while the leaves accounted for 23%. That pattern of divergence was also observed by Bragança et al (2010) when studying the accumulation and the partitioning of biomass in Conilon coffee.…”

“…At 324 days, the branches accounted for 77% of the DPAP, while the leaves accounted for 23%. That pattern of divergence was also observed by Bragança et al (2010) when studying the accumulation and the partitioning of biomass in Conilon coffee. In contrast to coffee, in which the branches are expected to bear fruit, the target organ in Duboisia is the leaf, which is the source of the alkaloids of interest in medicine.…”

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

“…O estudo da análise de crescimento é amplamente utilizado para acompanhar o padrão de crescimento da planta ou de partes dela, permitindo inferir a contribuição de diferentes processos fisiológicos para o crescimento vegetal, sendo útil no estudo de variações entre plantas geneticamente diferentes ou sob diferentes condições ambientais (Aguilera et al, 2004;Bragança et al, 2010 ). Este estudo baseia-se na produção fotossintética ao longo do desenvolvimento ontogenético da cultura, permitindo conhecer o acúmulo de matéria orgânica das plantas, sua distribuição e eficiência em ambiente natural ou controlado (Benincasa, 2003).…”

Efficiency and response of conilon coffee clones to phosphorus fertilization

“…Although literature presents relevant information on growth, development and nutrition of the coffee plant crop (Fonseca et al, 2004;DaMatta et al, 2007;Ferrão et al, 2008;Bragança et al, 2010), little is known about the crop nutritional efficiency.…”