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Aquidauana, Brazil

Pereira T.,University of West Santa Catarina | Coelho C.M.M.,Santa Catarina State University | Souza C.A.,Producao Vegetal | Mantovani A.,UNOESC | Mathias V.,UNOESC
Semina:Ciencias Agrarias | Year: 2015

The use of desiccants is an alternative to anticipate the soybean harvest and keep the physiological quality of seed. The objective of this work was to assess the production performance and germination seeds in response to differents stages and desiccation chemicals products to early harvest of soybean cultivars. The experiment was conducted in Campos Novos, in two harvests, it was used a randomized complete block design disposed in split-split-plots. Two phonological stages of application (stage R7.1 and R7.3) were tested in the main plot. Five soybean cultivars (NA 5909 RG, CD 2585 RR, BMX Turbo RR, SYN 1059 RR and BENSO 1RR were evaluated in the subplots, and three desiccants ammonium glufosinate, paraquat, carfentrazone-ethyl in the 2011/12 season and one control (without the desiccant application) were evaluated in the sub-subplots. In the 2012/13 season the carfentrazone-ethyl was substituted by diquat. It were evaluated the number of the days in the early harvest, yield, number of pods per plant, number of seeds per pod, mass of 100 seeds and germination percentage. The chemical dessecation with the use of glufosinate ammonium and paraquat applied in R7.1 stadium allowed to anticipate the harvest in six days (2011/12) and provided maintenance germination percentage (90% and 92%) compared to control (76%). The dessecation didn't influence negatively on seeds productivity, but reduced the mass of seeds in the two grown season, and early harvest was dependent of pre-harvest rain absence, with this preamble. The use of dessicants is a possibility of early harvest in production field of soybean seeds.

Valdebenito-Sanhueza R.M.,Proterra | Cantillano R.F.F.,Embrapa Clima Temperado | Bartnicki V.A.,Producao Vegetal | Spolti P.,Brazilian National Council for Scientific and Technological Development
Revista Brasileira de Fruticultura | Year: 2016

Bull’s eye rot (Cryptosporiosis perennans) and white rot (Botryosphaeria dothidea) are among the major apple summer diseases in Brazil. The aim of this study was to evaluate the effect of a protective film consisting of carnauba wax and clay (Raynox®) at doses of 2.5% and 5.0% in infection of C. perennans and B. dothidea in ‘Fuji Standard’ and ‘Pink Lady’ apple cultivars. Apple trees were sprayed five times from December 2007 to March 2008, as predicting of adequate conditions for the occurrence of fruit damage and growth. At harvest, the apples were inoculated with both pathogens and evaluated for incidence of decay. Indifferent to dose, the use of Raynox® reduced the incidence of white rot and bull’s eye rot in 67% and 42% in ‘Fuji Standard’, and 43% and 42% in ‘Pink Lady’, respectively. Increasing the dose increased the efficiency of the product for the control of bull’s eye rot. At dose of 2.5%, control of bull’s eye rot was 19% and 20%, respectively, of ‘Fuji Standard’ and ‘Pink Lady’ apples, while for the same cultivars, but with dose of 5.0%, these values were 65% and 63%. More studies are needed to adjust the dose and application criteria for the sunburn protectant could be recommended. © 2016, Sociedade Brasileira de Fruticultura. All rights reserved.

Coelho M.S.,Novo A/S | de Mendonca E.S.,Federal University of Espirito Santo | de Lima P.C.,Empresa de Pesquisa Agropecuaria de Minas Gerais | Guimaraes G.P.,Producao Vegetal | Cardoso I.M.,Federal University of Vicosa
Revista Brasileira de Ciencia do Solo | Year: 2013

The input of organic residues associated with the humification process promotes improvement of soil properties and enables the sustainability of the production system. Aside from supplying the coffee with nutrients, pulse crops can improve the quality of soil organic matter by forming humic substances. The purpose of this study was to evaluate the effect of green manures legumes on the quality of humic substances in soils under coffee under two environmental conditions in the region of Zona da Mata, in Minas Gerais. The species forage peanut, calopo, stylosanthes, velvetbean and spontaneous species were grown for four years on two family farms. After four years, soil was sampled and the humic substances were extracted and purified to obtain fulvic acids (FA) and humic acids (HA). The elemental sample composition (CHNO analyzer), UV-visible, infrared and thermogravimetry of the purified material were analyzed. The results showed that HA have a higher molecular weight, hydrophobicity, condensation, and aromatic compounds with higher C content, providing greater structural stability than FA. The humic substances in the environment facing south, with lower light incidence, lower temperatures and higher humidity, were structurally more stable and decay-resistant than the humic substances extracted from soil northwest-oriented soil surfaces. In the treatment with calopo, FA contained low C and high O levels, characterizing compounds of lower structural stability than FA in the treatments with stylosanthes, velvetbean and spontaneous species. In HA, the use of legumes showed similar results.

Neumann M.,State University of the Central West | Figueira D.N.,Federal University of Rio Grande do Sul | Ueno R.K.,Producao Vegetal | Leao G.F.M.,State University of Maringa | Heker J.C.,Jr.
Semina:Ciencias Agrarias | Year: 2015

The aim of the study was to evaluate the performance, apparent digestibility of dry matter and feeding behavior of Dutch steers fed different diets in feedlot. Were used 36 Holstein calves, from the same herd, with an average of 192 days and an average body weight of 221kg age. The experimental diets consisted of: T1: 100% concentrate diet; T2: 55% concentrate diet + corn silage; and T3: 55% concentrate diet+oat hay, and six replicates, where each replicate was a stall with two animals. Was no significant difference between treatments, and the treatment consists of the 100% concentrate diet had higher performance results with an average daily gain of 1.350 kg day-1; and feed conversion of 5.28 dry matter intake of 6.84. We evaluated also the 100% diet also influenced the feeding behavior, and the time for rumination, food consumption and water intake are respectively 2.75; 1.14; 0.15 hours day-1. The digestibility of dry matter was also a significant difference to the diet 100%, and this was around 76.37%. The diet showed 100% concentrate in terms of performance, an interesting alternative for termination of Holstein steers.

Camargo C.K.,State University of the Central West | De Resende J.T.V.,UNICENTRO | Camargo L.K.P.,Federal University of Parana | Figueiredo A.S.T.,Producao Vegetal | Zanin D.S.,Producao Vegetal
Semina:Ciencias Agrarias | Year: 2012

The organic agriculture has been increasing in recent years, mainly because it is a production system that is socially, economically and ecologically correct. Mineral nutrition in alternative production systems is a determining factor for the success of crops. This study aimed to evaluate desirable agronomic traits of strawberry under different levels of cattle manure and rock waste. The experiment was conducted in the Department of Vegetable Crops in the UNICENTRO Guarapuava/PR. The fruits were collected from October 2008 to January 2009. We used the following treatments: 0, 50 and 100 t ha-1 of cattle manure and 0, 2, 4 and 6 t ha-1 of rock waste. The variables were evaluated productivity, commercial production and average mass of fruits. The average mass of fruit was not influenced by levels and sources of fertilizer. The results have revealed that both productivity and the commercial production of fruits performed better in the association of higher levels of cattle manure with intermediate levels of rock waste.

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