Da Silva S.C.,University of Sao Paulo |
Gimenes F.M.A.,Institute Zootecnia |
Sarmento D.O.L.,Uniao Pioneira de Integracao Social |
Sbrissia A.F.,UDESC CAV |
And 3 more authors.
Journal of Agricultural Science | Year: 2013
The ability to adapt to a range of edaphic conditions favours the widespread use of marandu palisade grass in high as well as low input systems of animal production in Brazil. However, little information exists regarding the influence of grazing management practices on sward structure and the carry-over effects on animal responses. The present experiment was planned to evaluate animal behaviour, herbage intake (HI) and nutritive value, herbage accumulation and body weight gain (BWG) of beef cattle heifers grazing marandu palisade grass subjected to intensities of continuous stocking management. Treatments corresponded to four sward surface heights (SSH: 100, 200, 300 and 400 mm) and were allocated to experimental units (1200 m2 paddocks) according to a randomized complete block design with four replications. Herbage accumulation rate (HAR) varied with season of the year and SSH, with highest and lowest values recorded during summer and winter, respectively. During the summer, herbage accumulation was larger on swards managed at 200, 300 and 400 mm, with the opposite occurring during winter/early spring. Stocking rate (SR) and number of grazing days (GD) followed a similar seasonal pattern of variation, with values decreasing as SSH increased. Crude protein (CP) and in vitro organic matter digestibility (IVOMD) of hand-plucked herbage decreased as SSH increased from 100 to 400 mm, while the inverse happened with BWG (from 0·190 to 0·930 kg/day, respectively). Bite mass (BM) increased and rate of biting and grazing time (GT) decreased as SSH increased, with daily HI being larger on tall (300 and 400 mm) relative to short (100 and 200 mm) swards. Grazing management affected the nutritive value and the amount of herbage consumed, particularly through changes in BM. However, variations in intake were relatively more important than variations in nutritive value in influencing animal performance, highlighting the importance of providing favourable harvest conditions for grazing animals by establishing adequate sward targets for management. © Cambridge University Press 2012.
Organic carbon distribution in an Oxisol under phosphate fertilizer management and no-tillage in the Cerrado [Distribuição do carbono orgânico em Latossolo sob manejo da adubação fosfatada em plantio direto no Cerrado]
Jerke C.,Uniao Pioneira de Integracao Social |
de Sousa D.M.G.,Embrapa Cerrados |
Goedert W.J.,Embrapa Cerrados
Pesquisa Agropecuaria Brasileira | Year: 2012
The objective of this work was to evaluate the vertical and horizontal distribution of soil organic carbon (SOC) under five managements of phosphate fertilizer in a no-tillage system. The experiment was established on a Rhodic Haplustox, cultivated with soybean or corn for eight years, with millet as cover crop during the off-season. Plots were subjected to the following treatments: triple superphosphate in the sowing furrow or on surface, reactive natural phosphate on the sowing furrow or on surface, and without the addition of phosphate fertilizer (control). Phosphate fertilizer was applied annually at a dosage of 80 kg ha-1 of P2O5 on soil initially with a low phosphorous content. Samples were collected perpendicularly to the sowing line in seven sites distanced at 12.5 cm, and in five layers: 0-2.5, 2.5-5.0, 5.0-10, 10-20, and 20-30 cm. The content and the distribution of SOC are vertically and horizontally affected by phosphate fertilization, with higher contents in treatments with phosphate fertilizers. Compared to the control treatment, triple superphosphate showed higher SOC concentrations until the 5.0-10cm layer, and reactive natural phosphate until 10-20 cm. Phosphorus application in furrows provides greater volume of soil with suitable levels of SOC, compared to broadcast application.
Fonseca-Alves C.E.,São Paulo State University |
Correa A.G.,Clinica Medica d Pequenos Animais |
Da Costa H.X.,Federal University of Goais |
Elias F.,University Federal da Fronteira Sul |
And 3 more authors.
Semina:Ciencias Agrarias | Year: 2012
Juvenile cellulitis or juvenile sterile granulomatous lymphadenitis is a rare disorder that affects puppies between three weeks to six months years old. Clinical signs include alopecia, edema, papules, pustules and crusts especially on eyelids. Definitive diagnosis requires cytological and histological evaluation and early and aggressive therapy is recommended, once scars after recovery can be severe. The choice treatment is the high dose of corticosteroids use such as prednisone. Three animals of canine species were attended at the Veterinary Hospital Clinical Small Animal Service presenting different clinical signs. Hemogram, skin lesions and submandibular lymph nodes cytological examination was collected and analyzed. The treatment was instituted, using cephalexin (22mg/kg, twice daily) up to control of secondary bacterial infection, and prednisone (2mg/kg, once a day) until clinical resolution. Complete cure was obtained at the end of treatment. The aim of this work is to report three clinical cases of juvenile cellulitis in dogs.
Martins T.P.A.,University of Brasilia |
Gomides P.F.V.,Uniao Pioneira de Integracao Social |
Pereira Navarro F.K.S.,Federal University of Goais |
Navarro R.D.,University of Brasilia
Acta Scientiarum - Technology | Year: 2016
The study aimed to verify the vitamin C supplementation on performance and gonadal development of Nile tilapia. 160 fingerlings distributed in 16 tanks with 65 L capacity and constant water renewal in a closed recirculation system were used. The design was completely randomized with four treatments (0, 150, 300, and 600 mg of monophosphate L-ascorbic acid kg-1 diet) and four replications. We evaluated the weight gain parameters, apparent feed conversion, apparent feed intake and carcass yield to evaluate of production performance. We analyzed the sexual maturation stage and gonadosomatic index (GSI) to evaluate reproductive performance. There was no statistical difference in the performance parameters. It was observed significant difference to the GSI. No significance was found regarding other reproduction parameters. We recommend the use of 150 mg kg-1 of vitamin C to the diet of Nile tilapia from to the reproductive index. © 2016 Eduem - Editora da Universidade Estadual de Maringa. All rights reserved.