O objetivo deste trabalho foi avaliar o desempenho agronômico de cultivares de alface americana em sistema orgânico de produção nas condições de Rio Branco, Acre. O experimento foi instalado em área sob cultivo orgânico desde 2008, localizada no município de Rio Branco, Acre, nos meses de junho e julho de 2020. O delineamento experimental foi em blocos casualizados com seis tratamento com quatro repetições de 16 plantas cada. As cultivares avaliadas foram: Maui, Alaska, Delícia, Malibu, Grandes lagos e Rafaela. O cultivo foi protegido sob casa de vegetação coberta a 3,5 m de altura com filme aditivado de 100 µ e laterais abertas. Os canteiros de altura de 0,20 e largura de 1,20 m foram preparados com microtrator e adubados com 15 t ha -1 de composto orgânico. Foram avaliadas: massa fresca total, massa fresca comercial orgânica, massa fresca de cabeça, produtividade orgânica, produtividade comercial, diâmetro de cabeça, massa seca da planta, formação de cabeça (%) e pendoamento (%). As cultivares Maui e Alaska apresentaram maior desempenho, com maior massa fresca total, massa fresca comercial orgânica, massa fresca de cabeça e as produtividades orgânica e comercial. A porcentagem de formação de cabeças e de pendoamento é a mesma para as cultivares Maui,
This study aimed to evaluate the yield and profitability of organic radish cultivation using different between-row spacings. The experiment was conducted at the Seridó Ecological Station in Rio Branco – AC in a randomized block design with five between-row spacings (0.05, 0.10, 0.15, 0.20, and 0.25 m) and four replications. Each plot consisted of four rows transverse to the plant bed at a density of 16.7 plants m-¹, spaced 0,06 m from one another, with the planting densities of 316.7, 255.7, 216.7, 166.7, 116.7, and 66.7 plants m-2, respectively. The following agronomic variables were evaluated 35 days after sowing: shoot biomass, root yield, harvest index, root diameter, mean root mass, dry shoot mass, and the economic variables of mean total cost, cost-to-benefit ratio, yield to cover total costs, profitability, total income, net income, total cost, family labor remuneration, and profitability index. The smallest between-row spacing, increasing the planting density, increased the yield and reduced the root diameter without changing the mean root mass and the dry shoot mass. The increase in planting density increased the total cost and reduced the mean total cost, increasing the economic indicators of B/C ratio, profit rate, net and total income, profitability index, and family labor remuneration.
Cucumber is a vegetable species of high socioeconomic importance, whose fruits are consumed in all Brazilian regions. However, the knowledge of its organic production is still incipient. In this perspective, this study aimed to evaluate the productive performance of the Aodai cucumber under organic cultivation in response to the application of biofertilizer via soil and leaves. The experiment was conducted in the Seridó Ecological Site, Rio Branco, AC, by adopting a randomized block design in a 6x2 factorial arrangement, with four replications and eight plants per experimental unit. The treatments consisted of six concentrations of biofertilizer (0, 1, 2, 3, 4, and 5%) diluted in water, applied via foliar spraying, combined with the presence or absence of its pure application in the soil, with both methods applied at 7, 14, 21, and 28 days after sowing. The fertilizer was also applied in the soil at sowing. At the end of each harvest, the fruits were divided into two quality categories (classes 1 and 2), and then the following variables were evaluated: number of fruits per plant, mean fruit mass, yield, fruit diameter, and fruit length. There was no significant interaction of the biofertilizer application via foliar spraying or soil for any of the variables. The biofertilizer application via foliar spraying promoted a significant increase in the number of marketable fruits per plant, mean mass of total fruits, and marketable and total yields. The 3% concentration of biofertilizer diluted in water and applied on the leaves is the most efficient method to increment the cucumber yield.
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