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Maracanaú, Brazil

Araujo K.D.,Bolsista do INSA MCT Campina Grande PB | Dantas R.T.,Federal University of Campina Grande | De Andrade A.P.,INSA | Eder-Silva E.,IFCE
RA'E GA - O Espaco Geografico em Analise | Year: 2010

Our purpose was to make a survey of the plant species of the caatinga used for feeding livestock, the type of food offered to support animals in the dry season, the occurrence of food storage and reduction of livestock in the dry season. Questionnaires were applied to the rural population of São João do Cariri - PB and a map of the farms was made. It was evident that most properties have low breeding indexes, with small flocks of cattle, sheep and goats reared extensively in the caatinga. The species Pilosocereus gounellei, Opuntia palmadora, Cereus jamacaru and Manihot glaziovi are most commonly used for feeding cattle, and they are given in natura and in the conserved form for the animals.

de Freitas C.A.S.,IFCE | da Silva A.R.A.,DeNA | Bezerra F.M.L.,DeNA | Mota F.S.B.,Federal University of Ceara | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

With the excessive consumption of water in agricultural production, and the expansion of the cultivation of sugarcane due to growing demand for ethanol, in this context, a rational use of water for irrigation and use of wastewater in agricultural production has been raised. Therefore, the objective of this study was to evaluate the effects of reuse of treated domestic sewage effluent for irrigation of sugarcane. The study was conducted at the Research Center on Treatment and Reuse of Wastewater, in Aquiraz, CE. The experimental design was randomized blocks in split plots with four replications. In the plots were evaluated the effects of two types of water (well water and treated domestic sewage); in the subplots five irrigation water depths were allocated, based on percentage of evaporation in a Class "A" tank. It can be concluded that wastewater provided the highest potential yield of stem (272.1 Mg ha-1) and higher plant density (126,000 plants ha-1). The increase in irrigation water depths provided increase in potential yield and plant density, regardless of the type of water.

de Carvalho C.M.,FATEC Cariri | Viana T.V.A.,DeNA | Marinho A.B.,UNILAB | de Lima Junior L.A.,DeNA | Valnir Junior M.,IFCE
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

One of the viable alternatives for the occupation of the space left by the cotton in the semiarid of Ceará is the cultivation of Jatropha curcas L. aiming the production of biodiesel. Thus, this study aimed to evaluate the effects of different levels of irrigation water (735.53, 963.30, 1191.03, 1418.82 and 1646.60 mm) and nitrogen fertilizer (0, 25, 50 and 75 kg N ha-1) on the growth of the Jatropha curcas L crop. The data regarding the growth of fresh biomass epigeal phytomass were obtained at seven different crop cycle times (30, 60, 90, 120, 150, 180 and 210 days after pruning). According to the results, the stem height and the relative growth rate in stem height had a linear increase with the increase of water depths. The collection time influenced the values of height and stem diameter, resulting in both a linear behavior over the course of the experiment. There was a decline in the values of relative growth rate in height and stem diameter caused by climatic factors (temperature, relative humidity, rainfall and evaporation) and the onset of flowering and fruit formation.

Peixoto Filho J.U.,IFCE | Freire M.B.G.S.,Federal Rural University of Pernambuco | Freire F.J.,Federal Rural University of Pernambuco | Miranda M.F.A.,Federal Rural University of Pernambuco | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

The aim of this work was to evaluate the use of three types of animal manure: poultry, cattle and sheep manure on lettuce production in a field experiment in an Oxisol, at the Federal Agro Technical School, in Crato, Ceará State, Brazil. The experimental design used was randomized blocks with factorial arrangement [(3 × 5) + 2], with three manures, five doses, and two additional treatments, the first one with chemical fertilizer and the second one the control (without fertilizer), with four replications. The following variables were evaluated: fresh and dry matter of plant, yield ha-1 and number of leaves plant-1. The poultry manure provided higher yields of lettuce in the first crop, however, after the second crop it was surpassed by the cattle and sheep manures. The largest doses of the manure provided high yields until the third crop, being necessary new application for the maintenance of good results. The chemical fertilizer promoted high yields only until the second crop, being necessary a new application for the third crop.

Pillet E.,CNRS Physiology of Reproduction and Behaviors | Pillet E.,University of Tours | Labbe C.,French National Institute for Agricultural Research | Batellier F.,IFCE | And 7 more authors.
Theriogenology | Year: 2012

Egg yolk is normally used as a protective agent to freeze semen of equine and other species. However, addition of egg yolk in extenders is not without disadvantages and the demand to find cryoprotective alternatives is strong. The objective of this study was to test the cryoprotective capacities of liposomes composed of egg yolk phospholipids. Two experiments were conducted: 1) the first to determine the optimal composition and concentration of liposomes to preserve post-thaw motility and membrane integrity of spermatozoa; 2) the second to assess in vivo the cryoprotective capacities of these liposomes. In Experiment 2, post-thaw motility and membrane integrity of spermatozoa were also analyzed. Experiment 1 demonstrated that liposomes composed of phospholipids E80 (commercial lecithins from egg yolk composed mainly of phosphatidylcholine and phosphatidylethanolamine) and of Hank's salts-glucose-lactose solution (E80-liposomes) were the most efficient in preserving post-thaw motility. The optimal concentration was 4 % (v/v). In Experiment 2, fertility rate after artificial insemination of semen frozen with E80-liposomes was 55 % (22/40) compared with 68 % (27/40) with the control extender containing egg yolk (EY) (p = 0.23). Post-thaw motility parameters were higher with EY than with E80-liposomes (p < 0.0001). For post-thaw membrane integrity no difference was observed between the two extenders (p = 0.08). Liposomes composed of egg yolk phospholipids appeared to be a promising alternative to replace egg yolk in semen freezing extenders in equine species. © 2012 Elsevier Inc.

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