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Aquidauana, Brazil

Lemes J.S.,Federal University of Pelotas | Osorio M.T.M.,UFGD | Osorio J.C.S.,UFGD | Gonzaga S.S.,EMBRAPA - Empresa Brasileira de Pesquisa Agropecuaria | And 3 more authors.
Archivos de Zootecnia | Year: 2014

The objective of this study was to evaluate the carcass characteristics and meat quality of Corriedale lambs subjected to two grazing height on millet. The lamb's termination was done in summer annual pasture on a common cultivar of millet (Pennisetum americanum (L.) Leeke). The treatments consisted of two grazing heights, 20 and 40 cm. The slaughter was based on body condition between 2 and 3 (1 to 5 scale). Quantitative and qualitative evaluations were carried out on carcass and meat. The conformation demonstrated great relation with fattening status. There was no difference between subjective characteristics of color and texture. However marbling index values were higher (p<0.01), when lambs grazed on 20 cm height millet. In conclusion, there is neither difference between carcass characteristics and instrumental meat evaluations, nor difference in tissue components of the shoulder in Corriedale lambs subjected to different grazing heights on millet. However, the height of grazing affects the marbling score.

Gimenes Jr. M.,Paulista University | Do Amaral Dal Pogetto M.H.F.,Paulista University | Prado E.P.,Paulista University | De Souza Christovam R.,Paulista University | And 2 more authors.
Semina:Ciencias Agrarias | Year: 2011

Regarding tropical forage plants, the specie Brachiaria ruziziensis are prominence for to be most acceptable for cattle when compared with others Brachiaria species, besides the excellent competitive ability with weeds. Then, this study aimed to evaluate the effects of Brachiaria ruziziensis density in intercropping with corn crop, about weeds control and weeds development in the crop-cattle integration system. The experiment was realized during the period between December/2007 to May/2008, in the experimental area of Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba - SP. The treatment was composed in a factorial arrangement, by combination of four Brachiaria ruziziensis density (0, 10, 15 and 20 kg ha-1) and three weed species ((Ipomoea grandifolia, Digitaria horizontalis e Cenchrus echinatus), in intercropping with corn crop. The evaluations realized were: weed infestation (density m-2), the dry biomass (g plant-1) and leaf area (cm2 plant-1). It was noted that Brachiaria ruziziensis reduced the all of weeds infestation evaluated. Also, it was checked that Digitaria horizontalis and Ipomoea grandifolia were the weeds with most difficult control.

de Campos A.C.T.,Agronomia UFFS | Radunz L.L.,Agronomia | Radunz A.L.,UFFS | Mossi A.J.,Agronomia UFFS | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2014

The present study evaluated the preference index and insecticidal effect of oil "Carqueja doce" (Baccharis articulata) on the bean weevil (Acanthoscelides obtectus). For the experiment, insects not sexed aged between 20 and 50 days were used. The essential oil was extracted from the aerial parts of the plant by the hydrodistillation method. Te experiment was conducted in a completely randomized design with 6 replications in a factorial scheme 6 × 3 and 6 × 7 (dose × time), respectively, for preference index and insecticidal effect. Tests of repellency and insecticidal activity were conducted with doses of 0, 10, 20, 30, 50 and 100 μL of essential oil in 20 g of beans, being the evaluation carried out after 24, 48 and 72 h for repellency and after 1, 6, 12, 24, 48, 72 and 96 h for the insecticidal activity. Te results showed that the dose, exposure duration and interaction had significant effect on insect mortality. Regarding the dose, the logarithmic increase in the mortality rate was produced by the increase in dose, with an approximately 52 μL dose which recorded death in 90% of the insects. Te exposure time of 35 h caused the death of 90% of insects. Also, the essential oil repellent effect was observed at doses and exposure times studied.

Marques M.C.,University of Sao Paulo | Hamawak O.T.,Federal University of Uberlandia | Sediyama T.,Federal University of Vicosa | Bueno M.R.,Agronomia | And 3 more authors.
Bioscience Journal | Year: 2011

This study aimed to evaluate the average behavior, the genotype x environment (GxE), adaptability and stability of seven soybean cultivars at three sowing dates in Uberlândia-MG. The tests were conducted at Capim Branco Farm, belonging to the Federal University of Uberlândia. Sowing was held on october 29 (1st season), november 24 (2nd season) and december 17 (3rd season) 2007. The experimental design was a randomized, seven genotypes (UFUS Xavante, UFUS Riqueza, UFUS Guarani, UFUS Milionária, Msoy 8001, Msoy 8411 and Msoy 8914) with three replications in each of three sowing dates. Means were compared by Tukey test at 5% probability. Analysis of adaptability and phenotypic stability of genotypes was performed using the Eberhart and Russell (1966), Lin and Binns (1988) modified by Carneiro (1998) and centroid (NASCIMENTO et al., 2009). For grain yield, the cultivar UFUS Xavante was classified as specific adaptability to environment and high stability. The other cultivars were classified as being of general adaptability. For oil content, the cultivars Msoy 8914 and UFUS Xavante behaved as high stability and was classified as having high adaptability. For the character content of protein, all cultivars behaved as wide adaptability and low stability.

Galvao J.R.,CSIC - Institute of Agricultural Sciences | Rodrigues Fernandes A.,Institute Ciencias Agrarias | Melo N.C.,Agronomia | Alves Silva V.F.,Sao Paulo State University | Ferreira De Albuquerque M.P.,Agronomia
Revista Caatinga | Year: 2013

Cowpea [Vigna unguiculata (L) Walp] have great social and economic importance for the Para State. It grows well in areas with low precipitation and two crop cycles can be obtained annually. This study aimed to assess the effect of the residual fertilization from a previous culture (Sorghum bicolor L. Moench) and crop systems on cowpea yield and macronutrient concentration on leaves of three cowpea cultivars (BRSMilênio, BRS-Urubuquara e BRS-Guariba). The study was conducted at the UFRA. The treatments were two crop systems (minimum tillage and conventional), four levels of potassium (50, 100, 200 e 300 kg de KCl ha-1 applied to a previous sorghum culture) and the three cowpea cultivars. Treatments were organized as a three (4 x 2 x 3) factor experiment on a randomized complete block design. The soil was a yellow latosol. In each experiment plot five plants were selected to determine shoot dry matter and foliar nutrient concentration. Grain yield was determined after harvesting all plants on the experiment plot. The residual KCl fertilization affected foliar nutrient content, but did not affect shoot dry mass or yield of grain. Yield was higher in the minimum tillage system. Highest yield (1590 kg ha-1) was recorded int the cv. 'Guariba' when 100 kg of KCl ha-1 had been used in the previous crop. The highest content of leaf N and K was found in cowpea under minimum tillage system. The amount of P and Mg were higher in the conventional system whereas the amount of Ca did not change.

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