Cull dairy cows as a flexible tool for pasture control on East Coast hill country

2016 ◽  
Vol 16 ◽  
pp. 333-337
Author(s):  
P.D. Muir ◽  
B.C. Thomson ◽  
K.R. Ward ◽  
N. Bicknell
Keyword(s):  
Dairy Cows ◽  
Crude Protein ◽  
East Coast ◽  
Purchase Price ◽  
Crude Protein Content ◽  
Gross Margin ◽  
Pasture Management ◽  
Flexible Tool ◽  
Hill Country ◽  
Beef Cow

On East Coast hill country, climate change and variable pasture growth mean that there is an opportunity for a more flexible cattle system than the traditional beef cow. Cull dairy cows were purchased in autumn/winter across 3 years and several properties and used to clean up low quality winter feed (8.3 MJME/kg DM; crude protein content, 10.7%). In spite of the low quality feed on offer, winter liveweight gains averaged 238 g/day. Cows were set stocked over spring and growth rates averaged 749 g/day. Cows were slaughtered/sold when the spring/summer "clean-up" had been completed. Across three quite different years, cows were typically farmed for 34 weeks, put on an average of 115.3 kg and had estimated returns of 14.1 c/kg DM consumed. Variation in purchase price, weight gain and timing of slaughter resulted in returns ranging from 8.7 to 28.1 cents/kg DM consumed. These calculated returns do not include the effects of removing low quality feed on other farm enterprises. Keywords: cull dairy cows, pasture management, flexibility, gross margin, East Coast dryland, hill country

The effect of crude protein content of the supplement on the response to level of supplementation for dairy cows with ad libitum access to grass silage

1989 ◽  
Vol 1989 ◽  
pp. 24-24 ◽  
Author(s):  
C. S. Mayne
Keyword(s):  
Dairy Cows ◽  
Protein Content ◽  
Crude Protein ◽  
Production Systems ◽  
Crude Protein Content ◽  
Response Curves ◽  
Grass Silage ◽  
Milk Output ◽  
Four Levels ◽  
Yield Responses

There is now a considerable volume of evidence to indicate that, with high quality, grass silage-based diets, good animal performance can be achieved by offering supplements of high crude protein content at much lower levels than would be required with conventional supplements. Given the current constraint on milk output at farm level, there is considerable interest in lower cost milk production systems and high protein supplements would appear to have a role to play in this context. However, there is little information available which enables prediction of milk yield responses to increasing levels of supplements of differing protein content. The objective of this study was to determine response curves to supplements of differing protein content, given in addition to grass silage, thereby facilitating a least-cost diet type approach to achieving a given level of milk output.Concentrates containing either 100, 220, 340 or 460 g crude protein (CP)/kg fresh weight were offered to 72 autumn-calving dairy cows from day 14 of lactation, with each concentrate offered at four levels of feeding.

scholarly journals Evaluation of the availability of mass of forage: morphological responses and chemical composition of Tanzania grass subjected to two pasture-management strategies

2020 ◽  
Vol 36 (6) ◽  
Author(s):  
Michele Gabriel Camilo ◽  
Alberto Magno Fernandes ◽  
Tadeu Silva de Oliveira ◽  
Danielle Ferreira Baffa ◽  
Sarah Ellen Eduardo Bernardo ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Protein Content ◽  
Crude Protein ◽  
Management Strategies ◽  
Rest Period ◽  
Light Interception ◽  
The Other ◽  
Crude Protein Content ◽  
Pasture Management ◽  
Sward Height

The objective of this study was to evaluate the morphogenetic traits and chemical composition of Tanzania grass using a fixed rest period or according to light interception at 95%. The treatments consisted of evaluations of two Tanzania-grass pasture-management strategies: (1) LI95 - animals entered the paddocks when the pasture reached 95% of light interception (LI), with three days of paddock occupation; and (2) FR - the pasture was managed with a defoliation interval (DI) of 30 days, and three days of paddock occupation. The experimental area consisted of 4 ha, with 22 paddocks per treatments. Ten recently-calved cows were used per treatment in year 1, and eight cows were used per treatment in year 2. Sward height, forage mass, and morphological components and their chemical composition were evaluated. The management strategies used on the Tanzania grass pasture did not affect pasture mass or height in the pre- and post-grazing conditions, or the proportion of stems. However, the proportion of leaves was greater in the paddocks with 95% light interception. The crude protein content was higher in the paddocks with 95% light interception; the other nutrients were not affected. In conclusion, management adopting 95% light interception does not influence morphogenetic traits. Nevertheless, it promotes an increase in the crude protein content of grasses.

The effect of protein content of the supplement on the response to level of supplementation with dairy cattle offered grass silage ad libitum

1990 ◽  
Vol 1990 ◽  
pp. 43-43
Author(s):  
C. S. Mayne
Keyword(s):  
Dairy Cows ◽  
Protein Content ◽  
Crude Protein ◽  
Large Scale ◽  
Crude Protein Content ◽  
Fresh Weight ◽  
High Quality ◽  
Grass Silage ◽  
Ad Libitum ◽  
Four Levels

Previous studies at this Institute have shown that there is an interaction between level of supplementary feeding and protein content in the supplement. For example, a given milk yield can be obtained by offering supplements of high crude protein content at much lower levels than would be required with conventional supplements. Furthermore, this approach enables a greater reliance on the forage component of the diet, particularly where high quality grass silage is available. The objective of the present large scale study was to determine milk production responses to supplements of differing protein content, given with high quality grass silage, and to examine effects on ration digestibility.The experiment was carried out over a two year period, with a total of 168 autumn-calving British Friesian dairy cows. Supplements containing either 100, 220, 340 or 460 g crude protein (CP)/kg fresh weight were offered from day 14 of lactation. Each supplement was offered at four levels, with 9 animals per treatment.

scholarly journals Effect of dietary nitrogen source and crude protein content on nitrogen balance and lactating performance of dairy cows

2016 ◽  
Vol 53 (1) ◽  
pp. 72 ◽  
Author(s):  
Marina Elena Diniz Amaral Migliano ◽  
Camila Silano ◽  
Cristian Marlon De Magalhães Rodrigues Martins ◽  
Marcos André Arcari ◽  
Marcos Veiga Dos Santos
Keyword(s):  
Dairy Cows ◽  
Protein Content ◽  
Nitrogen Source ◽  
Nitrogen Balance ◽  
Crude Protein ◽  
Crude Protein Content ◽  
Dietary Nitrogen ◽  
Ad Libitum

O objetivo do presente estudo foi avaliar o efeito de dois teores proteicos (PB) e duas fontes nitrogenadas na dieta de vacas leiteiras, utilizando cana-de-açúcar como forragem, sobre o consumo, digestibilidade aparente total, produção e composição do leite, e o balanço de nitrogênio. Doze vacas leiteiras Holandesas em estágio intermediário de lactação foram distribuídas em três quadrados contemporâneos, em um delineamento em quadrado latino 4 × 4, com arranjo fatorial de tratamentos 2 × 2, em períodos de 21 dias, onde os primeiros 14 dias foram destinados para a adaptação às dietas e os últimos sete para as coletas de dados e análises. As vacas foram alocadas em baias individuais em um sistema free-stall, e alimentadas com dietas totalmente misturada (TMR) “ad libitum” compostas por duas fontes nitrogenadas principais (farelo de algodão ou grão de soja crú integral) e dois níveis de proteína (130 g ou 148 g/kg de matéria seca- MS). No presente estudo, houve efeito de interação entre a fonte nitrogenada e o teor de PB sobre o consumo de MS (CMS). As vacas alimentadas com grão de soja crú integral tiveram maior CMS quando o teor de PB da dieta foi de 130 g CP/kg MS, enquanto que as vacas alimentadas com farelo de algodão apresentaram maior CMS quando o teor de PB da dieta foi de 148 g PB/kg MS. Resultado semelhante ao CMS foi observado para o consumo de matéria orgânica, enquanto que não houve efeito de interação entre fonte nitrogenada e teor de PB sobre o consumo dos demais nutrientes dietéticos. A digestibilidade aparente total da FDN foi maior quando grão de soja crú integral foi utilizado como principal fonte nitrogenada da dieta; enquanto que a digestibilidade da PB não foi alterada pelas fontes nitrogenadas. Apesar de haver alterações no CMS e na digestibilidade aparente total, no presente estudo, não houve efeito de teor de PB e fonte nitrogenada sobre a produção de leite. Como conclusão, o uso de baixo teor dietético de PB (130 g PB/kg de MS) não altera o desempenho produtivo de vacas leiteiras e pode reduzir os custos da dieta, enquanto que a escolha entre grão de soja cru integral e farelo de algodão como principais fontes nitrogenadas da dieta pode depender apenas da disponibilidade e custo, uma vez que ambos ingredientes apresentam desempenhos semelhantes.

In sacco degradation of organic matter and crude protein of fresh grass (Lolium perenne) in the rumen of grazing dairy cows

1991 ◽  
Vol 116 (3) ◽  
pp. 429-436 ◽  
Author(s):  
A. M. van Vuuren ◽  
S. Tamminga ◽  
R. S. Ketelaar
Keyword(s):  
Organic Matter ◽  
Dairy Cows ◽  
Lolium Perenne ◽  
Nitrogen Fertilization ◽  
Crude Protein ◽  
Clay Soil ◽  
Crude Protein Content ◽  
N Application ◽  
Grazing Dairy Cows ◽  
In Sacco

SUMMARYIn three experiments, carried out in 1985 and 1986 in the Netherlands, the effects of herbage maturation and rate of nitrogen fertilization on rumen degradability of organic matter (OM) and crude protein (CP) in fresh herbage (Lolium perenne) were studied using the nylon bag technique. Experimental farms at Lelystad and Swifterbant (clay soil) and Achterberg (sandy soil) provided the herbage samples. From the results, the content of digestible CP entering the small intestine (DPI) was estimated.Crude protein content and in sacco degradability of OM and CP decreased with increasing grass maturity and with decreasing rate of N application. With every 100 g/kg DM decrease in CP content, the estimated content of DPI decreased by 19 g/kg DM, no matter how the CP content was manipulated.

Hybrid Bermudagrass compared with Kikuyu and common couch in coastal New South Wales. 2. Crude protein content, and estimated in vivo digestibility

1979 ◽  
Vol 19 (99) ◽  
pp. 444 ◽  
Author(s):  
AC Andrews ◽  
FC Crofts
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Cynodon Dactylon ◽  
New South ◽  
New South Wales ◽  
Early Spring ◽  
Crude Protein Content ◽  
Pasture Management ◽  
South Wales

In a previous study it was found that four ecotypes of hybrid Bermudagrass (Cynodon dactylon) (ecotypes 632, 692, 6389 and 719) outyielded kikuyu (Pennisetum clandestinum) and common couch (C. dactylon) at three sites in New South Wales. The relative feeding value of these grasses was compared in terms of their crude protein content and organic matter digestibility when grown for two years at Mitchells Island, New South Wales (Lat. 32�S). Over the two years, kikuyu had the highest crude protein content, averaging 124 g kg-1 compared with 11 6,115,ll 1, 103 and 108, respectively, for the ecotypes 632, 692, 6389, 719 and common couch. Mean digestibilities of ecotypes 632, 692, 6389 and 719 were 63, 60, 61 and 58% respectively, compared with 60% for kikuyu and 57% for common couch. The crude protein content and digestibility of all ecotypes tended to be highest in early spring and late autumn and lower in summer, trends which were opposite to dry matter production rates. It was concluded that the quality of hybrid Bermudagrass forage was comparable with that of other sub-tropical grasses now being used in subcoastal New South Wales. However, careful pasture management would be required to maintain herbage quality during summer.

scholarly journals Milk production of Norwegian Red dairy cows on silages presumed either low or optimal in dietary crude protein content

2018 ◽  
Vol 214 ◽  
pp. 42-50 ◽  
Author(s):  
Alemayehu Kidane ◽  
Margareth Øverland ◽  
Liv Torunn Mydland ◽  
Egil Prestløkken
Keyword(s):  
Dairy Cows ◽  
Protein Content ◽  
Milk Production ◽  
Crude Protein ◽  
Crude Protein Content ◽  
Dietary Crude Protein
Sign in / Sign up

Export Citation Format

Share Document