Marcos Eric Barbosa Brito

Produção de mudas de mamoeiro irrigadas com água salina

Due to the socioeconomic importance of papaya in northeast, area in which natural water contain high levels of salts, especially in its semi-arid region, the emergence and growth of two varieties of papaya seedlings irrigated with saline water was evaluated. The experiment was conducted in a greenhouse of Federal University of Campina Grande (UFCG), Campus Pombal, PB, during the period from May to July of 2011, using a randomized block design, with treatments distributed in factorial scheme 4 x 2, consisting of four levels of water salinity (1.2, 2.4, 3.6, 4.8 dS m-1) and two cultivars of papaya (Sunrise Solo and Tainung-1) with three replications, totaling twenty four plots. The emergence, growth and dry matter accumulation of seedlings was evaluated. The increasing salinity of irrigation water, even applied with a leaching fraction of 20%, increased the salt content in substrate above the threshold salinity of the crop, promoting reductions in the emergence, growth and dry matter accumulation, being the variety Tainung-1 more sensitive.

Fertigation of banana cv Prata Anã with N and K in an ultisol

The Brazilian Northeast is the main producing area, being responsible for about 35,80% of bananas national production. In spite of the favorable conditions to its cultivation, the average national yield has been a lot below its potential, due mainly to water and nutrients supply. Among all nutrients, nitrogen (N) and potassium (K) are the ones required in larger amounts by the banana. With the objective of studying the effect of four rates of N (0, 117, 235 and 352 kg ha-1 of N), and of four rates K (0, 157, 313 and 470 kg ha-1 of K2O) applied by fertirrigation in the 2o cycle of cultivation of the cv. Prata Ana, data was collected in an factorial experiment in randomized blocks, in an Ultisol of the coastal tableland, of the northeast of Brazil. There was not response to N but a linear one was observed for K. Soil K by Mehlich-1 critical level at 0,20- 0,40 m was 0,71 mmolc kg-1.

Desenvolvimento vegetativo, rendimento da fruta e otimização do abacaxizeiro cv. Pérola em diferentes níveis de irrigação

Regardless a relatively low water needs, pineapple fruit has a variable behavior related to water need throughout its biological cycle depending on the development stage. The objective of this work was to analyze irrigation on the vegetative development and fruits yield in pineapple cv. Perola. The experiment was conducted at the Universidade Federal de Sergipe Experimental Station, at Sao Cristovao - SE (11°01S, 37°12W), in a randomized block design, with four water level treatments as follow: 100% of Class-A (523.7mm ano-1) evaporation pan; 75% of Class-A (392.8mm ano-1) evaporation pan, 50% of Class-A (261.8mm ano-1) evaporation pan and 0% of Class-A evaporation pan, in six replications and twelve plants per plot. The splinkler watering system of irrigation was installed in a line, with an operating pression of 20 mca and a sprinkler dischrage of 1.33m3h-1. A minimum leaf area of 4552.6cm2 was observed, considering a water level of 122.9mm year-1, while a leaf dry matter was 147.6 g in 17mmyear-1. The maximum leaf length (D) of 88.9cm was estimated considering 532.7mmyear-1. The maximum fruit length of 23cm was observed, considering a water level of 296.9mmyear-1. The maximum estimated fruit weight was 1.736g in a water level of 356.4mm year-1. The irrigation seems to contribute in a positive way to the vegetative development in the pineapple fruit yield. It is important to mention that it could be observed a net profit of R

Desenvolvimento de porta-enxertos de umbuzeiro em resposta à adubação com nitrogênio e fósforo

1,161.17 ha-1, when a water level of 356.4mm ano-1 of irrigation was adopted.

Crescimento, produção de biomassa e eficiência fotossintética da bananeira sob fertirrigação com nitrogênio e potássio

The fertilization, notable with nitrogen and phosphorous, is fundamental on initial development stadium on fruits nursery trees. However, there is little scientific information about x91umbuzeirox92. This work had as objective to evaluate the effect of nitrogen and phosphorousx92 doses on x91umbuzeirox92 rootstocks (Spondias tuberosa Arr. Câm.). The experiment was carried out under nursery at x91Universidade Federal de Sergipex92 being used experimental design of randomized blocks in factorial 4X4 with four levels of nitrogen and four levels of phosphorous (0, 50, 100 and 150kg ha-1 of N and P2O5) respectively under urea form and simple superphosphate, with four replications. The higher rootstock (12.52cm) was obtained with doses of 97.58kg ha-1 of N, the higher stem diameter (2.18mm) was obtained with doses of 150kg ha-1 of N and 150kg ha-1 of P2O5. The major number of leaves was observed on presence of 126.03kg ha-1 of N and 150kg ha-1 of P2O5. The major dry matter production of total aerial plant was verified with a dose of 98.71kg ha-1 of N and 150kg ha-1 of P2O5. The leaf area presented a linear grown for both factors. The nitrogen and phosphorous fertilization contribute as positive performance on x91umbuzeirox92 doing the rootstocks development anticipated for some fruit trees of the Spondias genus. Phosphorousx92 doses from 150kg ha-1 were not recommended for pickles production using x91umbuzeirox92 xylopodium.

Rendimento e qualidade da fruta do maracujazeiro-amarelo adubado com potássio, esterco de frango e de ovino

de K 2 O. Palavras-chave - Plantas-nutricao. Plantas-efeito do potassio. Plantas-efeito do nitrogenio. Biomassa vegetal. Abstract - The objective of this study was to evaluate effects of nitrogen and potassium applied trough water irrigation on physiological characteristcs of banana cv Prata Ana in the coastal tablelands of Sergipe State. The experiment was carried out in the Sergipe Federal University Experiment Station, as 4x4 factorial, in randomized blocks with four repplications. Doses of nitrogen as ureia were (0; 250; 500 e 750 kg ha -1 ) and doses of potassium as potassium chloride were (0; 290; 580

Growth of lettuce under temporary saturation of soil

The majority of soils grown with passion fruit plants in Sergipe State present low natural fertility and this has caused reduced productivity of this plant. Thus, the aim of this work was to evaluate the combination of organic fertilization sources from poultry and sheep manure, with potassium doses on yield and quality of yellow passion fruits. This experiment was carried out in the Research Station of the Universidade Federal de Sergipe. The experiment design was in a 2x5 randomized blocks (organic fertilizer x potassium doses) +1 factorial scheme. The treatments were constituted by 2 sources of organic fertilizers (T1=10 L of poultry manure and T2 = 20 L of sheep manure) and five potassium doses (0, 27, 54, 81 e 108 g plants-1) and an additional treatment (2.5 L of poultry manure + 7.5 L of sheep manure). The variables studied were: total soluble solid concentration (SST), total acidity by titration (ATT), cortex thickness (ESPC) (mm), number of fruit per plant (NFPLM) and yield (REND) (t ha-1), in the first year. Yellow passion fruits presents adequate attributes for consumption in natura and for the industry, when fertilized with poultry and sheep manure combined with potassium doses, promoting SST between 10.8 and 14.02%, ATT of 8.48 to 7.57 g 100 mL-1 of juice, ESPC between 6.52 and 7.12 mm, REND between 27.5 and 30.24 t ha-1 and NFPLM of 28 to 29 fruits, respectively.

Adsorção de cobre em amostras de Plintossolo do Estado do Piauí, com diferentes características

This study was undertaken with the objective of studying the growth of the cultivars of lettuce Elba and Irene, submitted to soil saturation of different duration. The beginning of waterlogging occurred 17 days after transplanting (DAT) and it consisted of 7 duration times (0, 6, 12, 18, 24, 30 and 36 hours), evaluating the effects at 22, 28 and 38 DAT, this last one at the occasion of harvest of the plants; combined with two cultivars, resulted in 14 (7 x 2) treatments. The experiment was installed in randomized blocks, with three repetitions, the experiment consisted of one recipient with four plants. The increase in waterlogging duration reduced the growth and the lettuce production. The fresh dry matter of the aerial part being the variable of higher sensitivity to the anoxitic stress; the cultivars were sensitive to abiotic stress, but they tended to recover part of the growth with time following stress. The cv. Elba was superior compared to Irene in terms of number of leaves, diameter and stem height, dry matter of the aerial part and root; the Irene distinguished itself in fresh biomass of the aerial part.

Chlorophyll and macronutrients content in leaf tissue of Musa sp ‘Prata-Anã’ under fertigation

Copper adsorption by soil is very important, as after soil adsorptive capacity is exceeded, the metal become potentially available for leaching. The objectives of this study were to analyze copper adsorption considering different properties of soil samples studied, to evaluate the influence of the pH level on copper adsorption and to verify if Langmuir and Freundlich isotherms describe adequately the copper adsorption. Solutions containing different copper concentrations (6, 10, 20, 40, 60 e 80 mg L-1) were adjusted to pH 4.0, 5.0 and 6.0. The organic matter content and cation exchange capacity were the soil properties that most influenced copper adsorption. Langmuir and Freundlich models offered a good fit for the experimental data. Copper adsorption varied with soil pH, with greater adsorption at pH 6.0.

Growth and Production of Cultivars Ornamental Sunflower Irrigated With Water of Different Salinities

1 Paraiba State University, Av. das Baraunas, 351, Bodocongo, CEP 58109-753, Campina Grande-PB, Brazil. 2 Department of Agricultural Engineering, Sergipe Federal University, Av. Marechal Cândido Rondon, Jardim Rosa Elze, CEP 49100-000, Sao Cristovao-SE, Brazil. 3 Campina Grande Federal University, Academic Unit of Agricultural Sciences, Av. Jairo Vieira de Feitosa, Pereiros, CEP 58840-000, Pombal-PB, Brazil. 4 EMBRAPA, Agricultural Research Center of Tabuleiros Costeiros, Av. Beira Mar, 3250, Jardins, CEP 49025-040, Aracaju-SE, Brazil. 5 Department of Agronomy, Paulistan State University Julio de Mesquita, CEP 14884-900, Jaboticabal, SP, Brazil.