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Rio Grande, Brazil

Almeida E.F.A.,Empresa de Pesquisa Agropecuaria de Minas Gerais Epamig | Paiva P.D.O.,Federal University of Lavras | Lima L.C.O.,Federal University of Lavras | Silva F.C.,Emater | And 2 more authors.
Ciencia e Agrotecnologia | Year: 2011

Calla lily is an appreciated specie used for flower arrangements. In spite of its commercial importance, there is little information on calla lily postharvest conservation. Thus, this study aimed to determine the best sucrose concentration for pulsing and cold storage conditions to extend calla lily postharvest durability. Flower stalks were submitted to a pulsing pre-treatment using 2, 4, 8, 12 and 16% sucrose in the solution, for one hour, plus a treatment with direct storage in cold chamber (4°C), without a prior-treatment. Dry storage or storage in solution with the commercial product Flower® was also tested. A completely randomized design was used with four replicates and three inflorescences per plot. Spathe length and width were daily measured from which the opening and wilting processes were analyzed. It was observed that pulsing with sucrose was efficient in extending calla lily inflorescences opening process and durability. Dry storage for short periods (less than six days) can also be used, but a prior-treatment with 12% sucrose pulsing for one hour or with a water supply for the same period was required. For storage in solution, a pulsing with 5% or 7.5% sucrose was recommended. Source

Silva A.S.,Instituto Federal Baiano | da Silva I.F.,Federal University of Paraiba | Neto L.F.S.,Embrapa Solos | de Souza C.,Emater
Ciencia Rural | Year: 2011

When efficiently introduced, no-tillage system benefices soil and crops. In Brazil, no-tillage studies are concentrated in South and Center-west regions, being necessary information about it in Northeast region. The aim of this study was to evaluate the no-tillage influence on maize yield under rainfed agriculture in Northeast Brazil, in an experiment conducted during seven years. The crops of maize (Zea mays) and pigeon pea (Cajanus cajan) were used in three soil management systems: maize in conventional tillage (CC), maize in no-tillage (SD), maize in no-tillage plus pigeon pea sowed in the interrow (SG), with presence and absence of mineral N, P and K fertilization. Soil samples were collected at the beginning and the end of the experiment to determine soil bulk density, soil particle density, total porosity, dry and wet mean weight aggregate diameters and aggregate stability index. It was also quantified soil cover rate and maize yield. The soil porosity and aggregate stability were lower after the study period. Soil coverage increased significantly, about 96 % of the area under SD and SG systems, early in the culture development. Mineral fertilization and no-tillage systems highly influenced the maize yield. The rainfall was the factor that caused greater variability on the results of this study. Source

Fischer V.,Federal University of Rio Grande do Sul | Ribeiro M.E.R.,Embrapa Clima Temperado | Zanela M.B.,Embrapa Clima Temperado | Marques L.T.,Doutor em Zootecnia | And 5 more authors.
Revista Brasileira de Saude e Producao Animal | Year: 2012

This paper aimed to present the main results about the unstable non acid milk (LINA). The proportion of milk samples with thermal stability below the Brazilian dairy industry standard is a serious problem, with highest occurrence at short food supply periods. It is a multi factorial problem, which causing factors are related to test execution (ethanol concentration used), to management (feeding, climate, human-animal relation), to animal (stress susceptibility, productive potential, lactation stage, sanitary condition, digestive and metabolic disorders), among others. There are doubts to the accuracy and precision of the alcohol test to detect stability problems. Dairy industry needs a fast, low price and easy test, but that can identify milk suitable to thermal processing. An adequate animal's management besides realistic parameters of milk test might contribute to improve milk stability. Source

Neto C.P.C.T.,Emater | de Medeiros J.F.,UFERSA | Gheyi H.R.,UFRB | Dias N.S.,UFERSA | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2012

A study was carried out aiming to investigate management strategies for use of brackish water in the accumulation of dry matter and nutrients in two cultivars of melon (C1 - Sancho and C2 - Medellin) irrigated with low (S1 = 0.61 dS m-1) and high (S2 = 4.78 dS m-1) salinity water in different phases of crop: S1S1S2S2 - T1, S2S1S2S2 - T2, S2S2S1S2 - T3. The 1st, 2nd, 3rd and 4th term correspond, respectively, to different phases - initial growth, flowering, fruit maturation and harvest. Alternate irrigation during the crop cycle, two days of consecutive application with S1 water followed by one day with S2 water (S1 2 days + S2 1day - T4) and irrigation with S2 water throughout the cycle - T5 was also tested. Furthermore, as control, management practice at the farm where the experiment was conducted consisting of irrigation with a mixture of 37% S1 water and 63% of S2 water -T0 was used. The experiment was conducted in a completely randomized design in a 6 × 2 split-plots with four replications. The total dry matter accumulation in shoots of cv. Sancho was greater than Medellín in all management strategies. The nutrients required most by the two cultivars were calcium, potassium and nitrogen. Source

Bracatinga (Mimosa scabrella Bentham) cultivation for energetic purposes subsists to more than one hundred years. Typical activity in small rural properties, it is cultivated based on natural regeneration after second rotation. The wood is valuable, and it has characteristics for many alternatives of industrials uses, especially in furniture industry. After many years of expansion of the cultivated area, presently there is a gradual reduction on bracatinga's cultivation area. This research aims to identify causes of such plantings reduction and other impediments to bracatinga's producers, it also aims to define one proposal to bracatinga plantation development focusingits wood use in furniture industry. Therefore, it analyses bracatinga's producers, land ownerships and manual work accessibility, plantation managements and wood remuneration, associated to their confront against environmental public services obstructions, organizational needs of bracatinga's producers and opposition to the rural activity that is established by urban society. The data analyzed points to a reality in which bracatinga's cultivation chain will be extinguished in short time whether it is maintained the actual intervention of inspection services with rigid environmental limitations, associated to the acknowledge of rural reality by the urban society. Source

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