Alex Matheus Rebequi

Comportamento morfofisiológico da mamoneira BRS Energia submetida à irrigação com água salina

An experiment was conducted at the experimental station of Irrigation and Drainage of the Instituto Federal Baiano, to evaluate the growth variables of the castor bean BRS Energia as a function of salinity of irrigation water in lysimeters. The treatments were constituted of water salinity levels of 0.12; 0.8; 1.6; 2.4; 3.2; 4.0 and 4.8 dS m-1, disposed in a completely randomized design, with three replications and four plants per treatment. Fortnightly from 20 to 80 days after emergence, the growth variables and the absolute and relative growth rates of plant height, stem diameter and leaf area of plants were evaluated. The growth measured by height, stem diameter, leaf area and the rates of absolute and relative growth of each variable, decreased with increase in irrigation water salinity in all periods. The restrictions were in response to increase in soil salinity levels from non saline soil to slightly, moderately and strongly saline soil.

Comportamento de mudas de nim à salinidade da água em solo não salino com biofertilizante

An experiment was carried out in greenhouse during the period January to April 2010, at Center of Agricultural Sciences of the Federal University of Paraiba, in Areia, Paraiba State, Brazil, in order to evaluate the effects of saline water and bovine biofertilizer on the seedling growth of Indian neem. The substrate was material of a non-saline soil collected in depth of 0-20 cm. The treatments were arranged in a completely randomized design using a 5 x 2 factorial, referring to salinity levels of irrigation water of 0.5, 1.0, 2.0, 3.0 and 4.0 dS m-1, with and without bovine biofertilizer applied to the soil only once after dilution with water (1:1), a day before sowing, in volume corresponding to 10% of the substrate. At 86 days after emergence of seedlings the plant growth in height and principal root length, diameter of stem and root, leaf number and dry mass of roots and shoots of plants were evaluated. The salinity of irrigation water increased the salinity levels in the substrate inhibiting the growth in height, stem diameter, leaf emission by plants, diameter and length of principal root and the dry matter production of roots and aerial parts (leaves + stem) of neem, but with less pronounced decrease in plants under the treatments with bovine biofertilizer.

Esterco líquido bovino e uréia no crescimento e produção de biomassa do maracujazeiro amarelo

This study was carried out in order to evaluate the effect of liquid cattle manure and urea on dry matter production in different parts of yellow passion fruit plants. The experiment was conducted during the period of September 2006 to December 2007, in Remigio county Paraiba State, Brazil. The experimental design was randomized blocks with three replications using the factorial squeme 5 x 2 referring to liquid cattle manure (CLM) diluted with water (W) at levels 0% (0CLM + 4W); 25% (1CLM + 3W); 50% (2CLM + 2W); 75% (3CLM + 1W) and 100% (4CLM + 0W) taking 4 L plant-1 as standard volume of each mixture in soil without and with nitrogen applied monthly from 30 days after the planting to the end of the experiment. At 420 days after planting, were obtained the stem diameter and the number of productive branches of the plants; then, the plants were collected, each plant was divided in root, stem, lateral and productive branches and was obtained the dry matter of each part of the plant. The results showed that the interaction liquid cattle manure x nitrogen exercise significant effect on stem diameter, productive branches and biomass of the root, stem, leaves, lateral and productive branches, but with statistic superiority to plants with cattle liquid manure and urea applied to the soil.

Quality of yellow passion fruit juice with cultivation using different organic sources and saline water

ABSTRACT The experiment was conducted in field in the municipaly Remigio, state of the Paraiba, Brazil, to evaluate the effects of the use of saline water for irrigation, bovine biofertilizer and mulch on the chemical characteristics of the fruits of yellow passion fruit. The experimental design was completely randomized in a factorial 2 x 2 x 2, three replications and three plants per experimental unit. Study material consisted of irrigation with water is not saline (0.50 dS m –1 ) and saline (4.50 dS m –1 ), with and without application of bovine biofertilizer, with and without mulch. The use of bovine biofertilizer reduced the negative action of the salts, increasing the pH, soluble solids and vitamin C in fruits of yellow passion fruit. The veal and mulching biofertilizer did not affect the titratable acidity values in passion fruit with an increased salt content of water. The content of vitamin C in fruits did not change with the use of mulch and biofertilizer veal. The ratio soluble solids / acidity of the passion fruit was reduced with the use of organic inputs and soil cover by applying saline water for irrigation of plants. The increasing salinity of irrigation water increased the electrical conductivity of the juice, regardless of the application of fertilizer and use of mulch.

Physical characteristics of fruit of yellow passion fruit produced in soil with bio-fertilizer, mulching and saline water

espanolLas dimensiones y el rendimiento de los frutos son caracteristicas fundamentales para la calidad de frutos destinados al mercado y la industria. En este sentido se realizo un experimento para evaluar el formato, resistencia y rendimiento de maracuya amarillo producido en sustrato con biofertilizante bovino, mantillo e irrigado con agua salina. El diseno experimental fue de tres bloques al azar, con un arreglo factorial de 2 x 2 x 2, los factores evaluados fueron: agua de riego no salina (0,50 dS m-1), salina (4,50 dS m-1), con aplicacion y sin aplicacion de biofertilizante bovino, con y sin mantillo. Los frutos de maracuya fueron cosechados con 30% de corteza amarillenta y se evaluo el diametro de la cavidad longitudinal (largura), diametro de la cavidad ecuatorial (transversal), indice de formato de los frutos, resistencia de la cascara y rendimiento de jugo y pulpa. Los mayores valores de diametro de la cavidad longitudinal, diametro de la cavidad ecuatorial, indice de formato de los frutos y rendimiento de jugo y pulpa se obtuvieron con el uso de biofertilizante bovino y mantillo en los sustratos regados con agua de alto nivel de salinidad. El uso de agua de alto nivel de salinidad redujo el diametro de la cavidad longitudinal, el diametro de la cavidad ecuatorial, el indice de formato de los frutos, independientemente de la presencia de insumos organicos en el sustrato y aumento el rendimiento de jugo, pulpa y resistencia de la cascara en los tratamientos sin biofertilizante y sin mantillo. El mayor indice de formato del fruto presento el mayor rendimiento de jugo. EnglishThe size and yield of fruit are important in the physical quality of the fruits destined for markets and industry. An experiment was performed to evaluate the form, peel strength and yield of fruits of yellow passion fruit plant produced in substrata with bovine bio-fertilizer and mulching, irrigated with saline water. The treatments were designed in three random blocks using a 2 x 2 x 2 factorial arrangement; irrigation with non-saline (0.50 dS m-1) and saline (4.50 dS m-1) water, with and without application of bovine biofertilizer and with and without mulching. The passion fruit fruits were harvested when 30% of the peel was yellowish; we evaluated the diameter of the longitudinal cavity (length), diameter of the equatorial cavity (width), fruit form index, peel strength and juice and pulp yield. The substrate with bovine bio-fertilizer and mulching irrigated with high salinity water reduced the diameter of the longitudinal and equatorial cavity, the fruit form index and increased the firmness of the peel of the fruits of the yellow passion fruit plant. However, the use of the bovine biofertilizer and mulching irrigated with non-saline water increased the diameter of the equatorial and longitudinal cavity and the fruit form index.