Feed intake and utilization of maize silage-based complete diets by Australian Friesian cows and heifers at various stages of lactation

Moran, James; Trigg, TE

doi:10.1016/0301-6226(89)90077-8

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…Ranges in intakes, productivity and weeks post partum within each herd are presented in Table 1. Herds 4 and 5 were involved in trials in which cows were regularly changed from one management system to another every 2 weeks in a cross-over design (Moran and Trigg, 1989).…”

Section: Measurementsmentioning

confidence: 99%

The influence of season and management system on intake and productivity of confined dairy cows in a Mediterranean climate

Moran¹

1989

Anim. Sci.

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Link to this article: http://journals.cambridge.org/abstract_S0003356100032554How to cite this article: J. B. Moran (1989). The inuence of season and management system on intake and productivity of conned dairy cows in a Mediterranean climate. ABSTRACTThe influence of season and management system on the productivity of Friesian cows in a Mediterranean climate was assessed. Intakes of food and water and milk yields were measured in 154 cows over 2-5 years while intensively managed in yards giving access to shelter (free stalls) or that were fully exposed to solar radiation (open lots). Food quality was also monitored to permit estimates of the efficiency of utilization of metabolizable energy for milk production over fortnightly periods.The highest milk yields and energetic efficiencies were recorded during spring. Energy intakes were highest but energetic efficiencies were lowest during winter. Cows consumed the least food during summer and autumn and drank the most water during summer. The only significant effect of management system was for water intake, which was higher in the open lots than in the free stalls. There was evidence of heat stress in summer and cold stress in winter, but there appeared to be little benefit with milk yields through the provision of shelter.

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Section: Measurementsmentioning

confidence: 99%

The influence of season and management system on intake and productivity of confined dairy cows in a Mediterranean climate

Moran¹

1989

Anim. Sci.

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Maize silage for the pasture-fed dairy cow. 1. Effect of level of silage feeding, and responses to cottonseed meal while grazing perennial pastures in the spring

Moran¹,

Stockdale²

1992

Aust. J. Exp. Agric.

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Dairy cows in early lactation were fed a maize-silage-based supplement at either 3 or 8 kg DM/cow.day, while grazing irrigated perennial pastures at 45 or 30 kg pasture DM/cow.day. The supplement consisted of maize silage, alone or with 16% DM replaced by cottonseed meal. A fifth group grazed at the higher pasture allocation with no supplements. Milk yield and composition, liveweight and body condition, and pasture intake were monitored over 10 weeks during late spring-early summer. Samples of pre- and post-grazed pasture, supplement, rumen fluid, and faeces were collected for chemical analyses. Supplemention increased total feed intake and milk yield of grazing cows, except at the higher level of silage without cottonseed meal. From data on nitrogen content of the grazed pasture and the supplement, together with rumen ammonia concentrations, it was concluded that low dietary protein levels limited milk yield in cows supplemented with 8 kg maize silage DM/day without the additional cottonseed meal. Liveweight and body condition score increases were greater in supplemented animals, while their rumen volatile fatty acid profiles suggested greater partitioning of nutrients towards lipogenesis in body tissue. Pasture was substituted at the rate of 0.67 kg DM for every kg maize silage DM consumed.

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Maize silage for the pasture-fed dairy cow. 4. A comparison between grazed annual pastures and feedlotting in the winter

Moran¹,

Wamungai²

1992

Aust. J. Exp. Agric.

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Dairy cows in early lactation grazed irrigated annual pastures during 14 weeks in autumn and winter. They were grazed for either 2 or 6 h each day and then restricted to a feedpad and offered ad libitum maize silage. Other cows were fed 1 of 2 diets while in yards: a feedlot diet based on cereal grain, maize silage, and protein supplement; a mixture of conserved legume and maize silage. Feed intakes and cow performance were monitored. Cows in metabolism cages were fed the feedlot diet with various combinations of red clover and maize silage. Digestibility and rate of disappearance of test feeds from nylon bags were measured in the metabolism trials. Rumen samples were analysed for pH, ammonia, and volatile fatty acids. Dietary constituents were evaluated in vitro and in vivo using sheep. The cows on the feedlot diet recorded the highest DM intakes and the highest liveweight gain, and initially produced the most milk and milk protein. Their milk yields eventually fell to levels similar to those of the grazing cows. Cow performance was poorest on the pasture silage-maize silage mixture, and this treatment was discontinued after only 8 weeks. The poor performance was partly attributed to reduced silage quality from heat damage during ensiling the pasture. Supplementing red clover with increasing levels of maize silage did not influence digestibility but reduced DM intakes and cow performance. Cows grazing for 2 h/day produced 1-2 L/day less milk, and lost more weight, than cows grazing for 6 h/day; their rumen ammonia fell below critical levels. The grazing of high-clover pastures between morning and afternoon milking, combined with maize silage supplementation, is convenient and sustains high milk yields during early lactation.

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Feed intake and utilization of maize silage-based complete diets by Australian Friesian cows and heifers at various stages of lactation

Cited by 4 publications

References 22 publications

The influence of season and management system on intake and productivity of confined dairy cows in a Mediterranean climate

The influence of season and management system on intake and productivity of confined dairy cows in a Mediterranean climate

Maize silage for the pasture-fed dairy cow. 1. Effect of level of silage feeding, and responses to cottonseed meal while grazing perennial pastures in the spring

Maize silage for the pasture-fed dairy cow. 4. A comparison between grazed annual pastures and feedlotting in the winter

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