The effects of nitrogen and potassium fertilization on elephantgrass – Napier cv. were evaluated. An incomplete N x K factorial arrangement was studied in randomized block design with three replications with seven N levels (20, 50, 100, 200, 300, 350 and 380 kg/ha) and seven K levels (16, 40, 80, 160, 240, 280 and 304 kg/ha). The fourteen N and K combinations were obtained according to the Box Berard Matrix, increased 3, with an extra point. The elephantgrass – Napier […]

The effects of cutting frequency of 28, 35 and 42 days, performed in December, January and February at 0 cm, 15 cm and 30 cm from the ground on the chemical composition and tiller production of Panicum maximum Jacq were assayed. The experimental area was fertilized during the sowing, at uniform cuttings. Dry matter yield was the main factor affecting the nutrients production by area. The crude protein content of tillers showed no linear response to the cutting interval and […]

A 3-year study was conducted at EPAGRI – Experimental Station of Ituporanga, SC – Brazil, to select corn and sorghum cultivars suitability for silage production. Thirteen and eight corn and sorghum cultivars were tested and allotted to a complete randomized block experimental design, with three replications. The planting was done in 6m x 6m plot area. The harvest was done when the plant presented a dough stage of maturity. The evaluated characteristics included dry matter yield, crude protein, and total […]

Six Paspalum and four legumes accessions were evaluated to identify forage species adapted to poor soil drainage conditions. The experiment was carried out during three successive years, in Modelo Farm, Terenos county (MS, Brazil), in “cerrado” type field area, just after the removing of the natural vegetation, on a poor Plinthaquox soil drainage conditions. Dry matter and green matter yields were evaluated by cuttings done at three, six, nine and 12 weeks after a plot cut uniformity in times that […]

This work was carried out under greenhouse conditions, in 1997, at Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul (UFRGS). A split plot randomized complete block experimental design was used, with six replications, to evaluate root lengths, average radius, roots surface and dry matter of roots with the objective to evaluate the effect of humic compounds addition in the development of ryegrass roots. Ryegrass forage was grown in pots with irrigated sand with four levels of humic compounds […]

Six Alpine goats with an average milk yield of 2.5 kg/day were randomly assigned to two groups of three and allotted to thermoneutral or heat stress conditions, for 56 days in climate chamber room. A crossover experimental design was used. The goats under heat stress were exposed to a diurnal average air temperature plus simulated solar radiation of 33. 84oC. The heat-stressed goats showed elevated respiratory frequency, respiratory minute volume, respiratory evaporation, rectal temperature and sweating rate, while the tidal […]

Sire x herd interactions were studied in 30,789 records of birth (BW) and weaning weight (WW) and weight gain from weaning to 18 months of age (G345) of Nellore cattle born from 1984 to 1994 in twelve farms located in three states of central and southeastern Brazil, with a total of 48.495 animals in pedigree. Sire x herd interaction was considered as a random effect in single trait and two traits animal models using MTDFREML. This effect was important for […]

One hundred and twenty estrus cycles of 105 Mangalarga Marchador breed mares were analyzed to study the effect of number of inseminations per cycle on the fertility of mares inseminated with cooled semen. The mares were randomly allocated in the following group: T1 – one AI/cycle; T2 – two AI/cycle; T3 – tree or more AI/cycle. The cycles were controlled by rectal palpation and teasing. The insemination were made at each 48 hours, from a 30-35 mm follicle diameter until […]

The objectives of this study were to obtain estimates of heritability and genetic, phenotypic and environmental correlations for average daily gains from birth to weaning (DGBW), from weaning to 12 months (DGW12), from 12 to 18 months (DG1218) and from 18 to 24 months (DG1824) of age, and to estimate the principal components for these growth traits in Canchim cattle. The data were analyzed by the least square method. The heritability estimates were 0.39± 0.07 (DGBW), 0.12±0.04 (DGW12), 0.20±0.05 (DG1218) […]

Data collected from 1982 to 1999, in Brasília, DF, Brazil, on 1102 head of Brazilian Bergamasca sheep were analyzed to obtain information on performance of the breed in the region. Average lambing interval was 337.94±109.4, but under continuous mating, the average lowered to 282.1days. Ewe lambing rate was 90.13%, frequency of twins 12.63%, number of triplets negligible and sex ratio 1:1. Lambing occurred in all months of the year. Age at first lambing was 588.58±65.31days. Average birth, 3, 6 and […]