The cycle pruning programmed is a reinvigoration technique widely employed in Conilon coffee. This strategy may also be adopted for Arabica coffee to increase its crop longevity and yield. In this scenario, the present study proposes to examine the influence of the cycle pruning programmed on the vegetative and productive development of Arabica coffee. The experiment was developed in the field as a randomized-block design with four replicates. Treatments were tested in a 4 × 2 factorial arrangement consisting of four stem densities (4000, 8000, 12000 or 16000 stems ha-1) and two management strategies for the removal of plagiotropic branches (annual or biennial removal of branches which had reached 70% or more of their production capacity). For some variables, the treatments were organized as a 4 × 2 × 2 factorial arrangement in which the last factor corresponded to two regions of data collection in the plant (upper or lower). For all factorial arrangements, an additional treatment (control) was employed corresponding to traditional pruning (recepa). Annual or biennial removal of plagiotropic branches which had attained 70% or more of their production capacity can be adopted with no losses to crop yield. The cycle pruning programmed improves the distribution of branches, increases canopy area and prevents the occurrence of the “naked neck” phenomenon, observed in control treatment. Additionally, it provides better agronomic and productive performance; therefore, it can be used as a substitute for recepa.

Coffee crop represents a great economic importance in Brazil, in which Arabica coffee represents a great part of the national production. However, the average yield of Arabica coffee is low, which reduces the profitability of the activity. Pruning systems can regain vigor and increase productivity. The system most adopted by coffee farmers is "recepa" (cutting off the orthotropic branch at 0.8 m above ground), which has not resulted in efficient reinvigoration. It is believed that the implementation of new systems, such as programmed pruning cycle, can improve the productivity of Arabica coffee. However, the economic impacts and risks associated with this type of pruning are Baitelle et al. JEAI, 21(4): 1-9, 2018; Article no.JEAI.39621 2 still unknown. The objective of this study was to determine the feasibility and financial risk of the use of programmed pruning cycle compared to traditional Arabica pruning. A financial viability of programmed pruning cycle without Arabica coffee was determined by calculating the Net Present Value and the Internal Rate of Return. Using the sensitivity analysis, to identify the items with the greatest impact on the project. Finally, the financial risk of this technique was determined by the Monte Carlo method. Original Research Article

No abstract

The knowledge about the interactions between pit dimensions and propagation methods can provide important information for the Conilon coffee crop since these basic steps can influence the entire production cycle of the tillage. The objective of this study was to access the initial development (vegetative and radicular) of Conilon coffee propagated by seed and stake and cultivated in pits with different dimensions. The experiment was a randomized block design with four replicates of three plants. The treatments were arranged in a 2x3 factorial scheme, with two Original Research Article

A acácia é uma planta de rara beleza, muito procurada para ornamentação e paisagismo, porém para produção de mudas é necessário que se conheça sua germinação e emergência, assim como o melhor substrato para o desenvolvimento de suas plântulas. A pesquisa teve como objetivo avaliar a eficiência da utilização de giberelina na emergência e desenvolvimento inicial de plântulas de acácia amarela, em diferentes substratos. As sementes foram coletadas em árvores localizadas no IFESCampus Santa Teresa e semeadas em tubetes 290 mL, nos substratos terra, areia, vermiculita, bioplant ® e mistura contendo areia+terra+bioplant ® (1:1:1). O delineamento compôs-se de quatro blocos casualizados, com cinco substratos e quatro repetições de 50 sementes, sendo elas imersas por 30 minutos em solução de giberelina 2000 mg.L -1 e água destilada. Avaliou-se a porcentagem de emergência; índice de velocidade de emergência; tempo médio de emergência; sobrevivência das plântulas; número de folhas; diâmetro do coleto; comprimento da raiz; volume de raízes; altura da parte aérea; relação altura da parte aérea com o diâmetro do coleto; relação altura da parte aérea com o comprimento da raiz. Sementes tratadas com giberelina não apresentaram diferença significativa das sementes não tratadas, sendo que apenas o substrato areia mostrou-se impróprio para a produção de mudas de acácia amarela.

This study aims to compare the agronomic performance and the productivity of the corn hybrid AG 1051 and the Incaper Capixaba 203 variety in function of different nitrogen (N) doses in coverage. The experiment was held at the Federal Institute of Espírito Santo -Campus Santa Teresa. The design was of randomized blocks and the treatments were arranged in a split plot scheme, with four repetitions. The plots were represented by two corn genotypes and the subplots consisted of five N doses coverage: 0, 60, 120, 180 and 240 kg ha -1 N. After flowering, the plant height, stem diameter, the height of ear insert and the number of leaves per plant were evaluated. After harvest, the number of grains per spike, the 1000 grain and grain productivity were evaluated. All N dosages influenced all the features evaluated for both genotypes, which showed an increase with the increasing dose of the nutrient. The differences between the genetic materials to all the analyzed variables, except in grain productivity were found. The N dose estimated provides greater productivity for average grain (8785.98 kg ha -1 ) for both genotypes 207.17 kg ha -1 of N.

RESUMO:Os gastos com mão de obra podem representar mais de 50% do custo total de produção do café Conilon, sendo a poda e a desbrota responsáveis por maior parte desses custos, ficando atrás somente dos gastos com colheita. Alguns fitorreguladores de crescimento do grupo das auxinas associados ao potássio (K 2 O) podem reduzir a emissão de brotos. Objetivaram-se com o trabalho verificar o efeito do ácido naftalenoacético (ANA) associado à adubação potássica na brotação de café Conilon. O experimento foi realizado de junho de 2014 a dezembro de 2015, em lavoura adulta de café Conilon não irrigada, da cultivar "G35-Verdebrás", localizada no Instituto Federal do Espírito Santo -Campus Santa Teresa. Utilizaram-se o delineamento em blocos casualizados, com o arranjo fatorial 5x4 entre níveis de ANA e níveis de K 2 O, respectivamente. Foram empregadas cinco doses de ANA (0, 50, 100, 250 e 500 mg L -1 ), e quatro de K 2 O na adubação, (60, 120, 240 e 480 kg ha -1 ). Observou-se que a aplicação de ANA influencia a emissão de brotos por favorecer a dominância apical das plantas. Os níveis aplicados de K 2 O interferem na ação do ANA, sendo que a aplicação de dosagens elevadas do nutriente pode inibir a ação deste fitorregulador. A aplicação de 344 mg L -1 de ANA associada à adubação de 120 Kg ha -1 de K 2 O reduziu o número de brotos por planta sem interferir na produtividade e desenvolvimento das brotações remanescentes. Termos para indexação:Coffea canephora, auxina, potássio, dominância apical. NAPHTHALENEACETC ACID ASSOCIATE TO POTASSIUM FERTILIZATION ON COFFEE SPROUTING CONILON ABSTRACT: Spending on labor may represent more than 50% of the total production cost of Conilon coffee, and pruning and thinning responsible for most of these costs, behind only the harvest expenses. Some growth phytoregulator auxin group associated with potassium (K 2 O) can reduce bud emission. It is aimed to work verify the effect of naphthalene acetic acid (NAA) associated with potassium fertilization on budding Conilon coffee. The experiment was carried out from June 2014 to December 2015 in adult crop of non-irrigated Conilon coffee, the cultivate "G35-Verdebrás" located at the Federal