Mikael Neumann

Manipulação da altura de corte da planta de milho (Zea mays, L.) para ensilagem visando a produção do novilho superprecoce

The experiment was conducted with the objective to evaluate the performance of feedlot finished calves, fed with silages of AG-5011 corn hybrid harvested with different cutting height: low cut (20 cm) and high cut (42 cm). Twelve Braford calves with an average age of seven months and average live weight of 209 kg, were used. The feedlot period was 126 days, divided in two periods of the 63 days. The roughage:concentrate ratio was 60:40 and 50:50 for the first and second periods, respectively. The high cut silage showed higher IVOMD (66.67 vs 58.60%) and lower NDF (41.47 vs 47.80%). Significant interaction was observed between cutting height and evaluation period for dry matter intake (DMI) expressed per 100 kg of live weight and per unit of metabolic weight, digestible energy intake (DEI), weight gain (ADG), feed conversion (FC) and energy efficiency (EE). Animals fed with the high cut silage during the first period presented higher ADG (1.352 vs 1.198 kg) and better FC (4.82 vs 5.39 kg of DM/kg LW) than animals fed with the low cut silage. However, with the reduction of the roughage:concentrate ratio to 50:50 during the second period, the ADG (1.228 vs 1.336 kg) and FC (6.43 vs 6.34 kg of DM/kg LW) were similar. Slaughter and cold carcass weight, dressing percentage and subcutaneous fat thickness were similar, being, respectively, 371.8 kg; 195.3 kg; 52.46%; and 5.7 mm for the higher cut and 368.2 kg; 195.7 kg; 53.08%; and 3.7 mm for the lower cut.

Terminação em Confinamento de Vacas e Novilhas sob Dietas com ou sem Monensina Sódica

Feedlot parameters of two categories of cull females, cows and heifers, fed two diets, with and without monensin, were studied. The daily amount of monensin supplied was 150 mg/animal. The roughage:concentrate ratio was 65:35. The roughage used was sorghum silage. The inclusion of monensin to the diet caused a significant reduction of the daily voluntary dry matter intake (DDMI), which was more pronounced for the cows (9.1%) than for the heifers (1.7%). The animal category x diet interaction affected significantly the average daily weight gain (ADG). Monensin caused a slight increase in heifers ADG (1.92 vs 1.86 kg) while for the cows it reduced the ADG (1.56 vs 1.74 kg). Feed:gain ratio (DDMI/ADG) was not affected by monensin. Cows showed a higher DDMI than the heifers. However when DDMI was expressed per 100 kg of live weight and per unit of metabolic weight the difference disappeared. Heifers were more efficient than cows in converting feed into weight gain (6.40 vs 8.28 kg of DM/kg of live weight gain). The cost of feed per quilogram of live weight gain was R

Avaliação da silagem de capim papuã (Brachiaria plantaginea) por meio do desempenho de bezerros de corte confinados

.66 and .69 for the heifers, and .84 and .74 for the cows, respectively, for the diets that included or not monensin.

Características agronômicas produtivas, qualidade e custo de produção de forragem em pastagem de azevém (Lolium multiflorum Lam) fertilizada com dois tipos de adubo

The experiment was conducted with the objective to evaluate the parameters of performance of feedlot calves, fed with three roughage sources: GSWI - Alexander grass (Brachiaria plantaginea) silage without inoculante, GSI - Alexander grass silage with inoculant and MCSS - mixture of corn silage (Zea mays) and sorghum silage (Sorghum bicolor). Thirty-six calves with an average initial live weight of 159kg and average age of seven months, were used. The animals were kept in feedlot during 105 days, divided in five periods of 21 days. The roughage:concentrate ratio was 65:35 for all diets. The use of inoculant in the Alexander grass silage did not affect (P<.05) the variables studied. No significant interaction was observed between roughage source and feedlot period for daily dry matter intake (DMI) and daily digestible energy intake (DEI), expressed per animal (DMID and DEID), per 100kg of live weight (DMIP and DEIP) and per unit of metabolic weight (DMIM and DEIM), for daily weight gain (ADG), for feed conversion (FC) and for energy efficiency (EE). The contrast analysis between the diets with Alexander grass silagem (GSWI+GSI) and MCSS showed that the animals fed with Alexander grass silage had lower DMID (4.99 versus 5.56kg day-1) without difference for DMIP and DMIM, ADG (0.800 versus 1.061kg day-1) and worse FC (6.26 versus 5.30).

Produção do Superprecoce a Partir de Bezerros Desmamados aos 72 ou 210 Dias de Idade

One experiment was conducted, with the purpose to evaluate the production, quality and the production cost of forage of ryegrass, in continuous grazing, fertilized with two types of fertilizer: Organic-mineral (FOM) and chemical (FC) applied as top dressing. The pasture was implanted in 04/24/1999, with top-seeding, and the level of fertilizer was300kg ha-1 of FOM formula 06-08-08 or FC formula 10-18-20. No significant interaction between fertilizer and evaluation period was observed for the variables studied. The fertilizer sources did not affect the percentage of dry matter (DM) in the residue (22.6 vs 22.2%), the accumulation rate of dry matter (72.3 vs 63.2kg ha-1 of DM), the total forage production (7518 vs 6801 kg ha-1 of DM), the percentage of crude protein (12.8 vs 12.7%), the neutral detergent fiber (57.4 vs 57.4%) and acid detergent fiber (31.0 vs 32.3%), for FOM and FC, respectively. The total cost of the pasture was of 225.90 and 253.50 R

Resposta econômica da terminação de novilhos em confinamento, alimentados com silagens de diferentes híbridos de sorgo (Sorghum bicolor, L. Moench)

ha-1, where the fertilizer represented 37.6 and 44.4%, respectively, for FOM and FC. The production cost of the pasture DM was 0.030 and 0.037 R

Yield and production components of barley plant ( Hordeum vulgare ) in function of nitrogen fertilization

kg-1, for FOM and FC, respectively.

Associative effect of interrow spacing, plant densities and age on vegetative and qualitative performance of forage sorghum.

The experiment was conducted to evaluate the feedlot performance, from 210 to 408 days of age of calves weaned at 72 (T 72 ) or 210 (T 210 ) days. Thirty-six non castrated Braford (5/8 Hereford 3/8 Nellore) calves were used. The average weight at the beginning of the experiment was 209 (T 72 ) and 192 kg (T 210 ). The whole feedlot period was 168 days, divided in four periods of 42 days. The roughage:concentrate ratio was 60:40 for the first and second periods, 50:50 for the third period and 45:55 for the fourth period. No significant interaction was observed between weaning age and feedlot evaluation period for average daily dry matter intake (DMI) and average daily digestible energy intake (DEI), expressed per animal (DMID and DEID), per 100 kg of live weight (DMIP and DEIP) and per unit of metabolic weight (DMIM and DEIM), for average daily weight gain (ADG), feed efficiency (FE) and energy efficiency (EE). Animals weaned at 210 days presented higher DMIP (2.25 versus 2.07% of LW) and DEIP (7.05 versus 6.48% of LW) than animals weaned at 72 days. No difference was observed for DMID (6.75 versus 6.98 kg/day), ADG (1.066 versus 1.074 kg/day), FE (6.42 versus 6.72 kg of DM/kg of LW) and EE (20.18 versus 21.13 Mcal/kg of LW) for animals weaned at 72 or 210 days. Slaughter and hot carcass weight were similar, being, respectively, 424 and 232 kg for T 72 , 406 and 221 kg for T 210 animals. The results showed that animals weaned at 72 days present feedlot performance, slaughter and carcass weight similar to those weaned at 210 days.

Potential of corn silage production in different sowing times in the Paraná Midwest region

The experiment was conducted with the purpose of evaluating the economic return of the feedlot finishing of steers fed with silages from different sorghum hybrids: AGX-213 and 2002 (forage); AGX-217 and AG-2005E (double-purpose). Forty-eight steers with an average age of 19 months and average live weight of 316 kg were used. The roughage:concentrate ratio was 63:37, for all the diets tested. The silages cost was 15.13; 13.53; 18.55 and 20.20 R

Soil quality: concepts, indicators and evaluation.

/t, for AGX-213, AG-2002 e AG-2005, respectively. The live weight gain/ha estimated and based on the silage production/ha was 1879.9; 2038.3; 1609.9 and 1912.5kg. The cost/kg of weight gain in R