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1. A decision-support tool for autumn management in a spring-calving pasture-based dairy system

Author:
Neal, Mark; Kay, Jane; Peel, Sally; McCarthy, Sean
Source:
Animal production science 2017 v.57 no.7 pp. 1343-1349
ISSN:
1836-0939
Subject:
autumn; body condition; calving; cows; crops; decision making; decision support systems; drying; energy; farmers; feeds; forage; grazing; milking frequency; models; pastures; profitability; purchasing
Abstract:
... Success in a pasture-based dairy system relies on matching feed supply and feed demand in a profitable manner. Autumn is an important period for decision making to maximise current-season profitability, while ensuring key targets such as cow body condition score and the level of average pasture cover are met for the upcoming season. There are many tactical management strategies for farmers to cons ...
DOI:
10.1071/AN16468

2. Effects of pasture allowance on milk production of dairy cows offered increasing amounts of partial mixed rations in spring

Author:
Auldist, M. J.; Wright, M. M.; Marett, L. C.; Jacobs, J. L.; Wales, W. J.
Source:
Animal production science 2017 v.57 no.7 pp. 1305-1310
ISSN:
1836-0939
Subject:
Holstein; Lolium; alfalfa hay; canola meal; corn; dairy cows; dairy protein; farmers; grazing; lactation; milk; milk fat; milk production; pastures; spring; wheat
Abstract:
... Milk production was measured in Holstein–Friesian cows offered low, medium or high allowances of ryegrass pasture (15, 25 or 40 kg DM/cow.day to ground level) and receiving different amounts of supplement (6, 10, 12 or 14 kg DM/cow.day) as a partial mixed ration (PMR). The 27-day experiment was conducted in spring when cows were 45 ± 17.3 days in milk (mean ± s.d.). Two groups of six cows received ...
DOI:
10.1071/AN16544

3. Grazing management: setting the table, designing the menu and influencing the diner

Author:
Gregorini, Pablo; Villalba, Juan J.; Chilibroste, Pablo; Provenza, Frederick D.
Source:
Animal production science 2017 v.57 no.7 pp. 1248-1268
ISSN:
1836-0939
Subject:
animal behavior; animal welfare; animals; biodiversity; diet; environmental impact; excretion; farmers; farms; grazing; grazing management; livestock production; observational studies; pastoralism; profitability; research programs
Abstract:
... Pastoral livestock-production systems are under increasing environmental, social and consumer pressures to reduce environmental impacts and to enhance biodiversity and animal welfare. At the same time, farmers face the challenge of managing grazing, which is intimately linked with profitability. Recent advances in understanding grazing patterns and nutritional ecology may help alleviate such press ...
DOI:
10.1071/AN16637

4. Individualised feeding of concentrate supplement in pasture-based dairy systems: practices and perceptions of New Zealand dairy farmers and their advisors

Author:
Dela Rue, B. T.; Eastwood, C. R.
Source:
Animal production science 2017 v.57 no.7 pp. 1543-1549
ISSN:
1836-0939
Subject:
consultants; cost effectiveness; cows; dairy farming; farmers; farming systems; feeds; grazing; herds; interviews; lactation; milk production; models; pastures; professionals; surveys; uncertainty; New Zealand
Abstract:
... Approximately one-third of New Zealand dairy farms have in-shed feeding systems, and quarter of these systems have individual-cow feeding capability. There is little information about the factors motivating farmers to install individualised feeding technology in New Zealand and their management practices. A survey was conducted of 42 farmers using individualised feeding, followed by interviews of ...
DOI:
10.1071/AN16471

5. Perennial ryegrass breeding and the scaling issue: a review of system experiments investigating milk production and profit differences among cultivars

Author:
Hendriks, Stacey J.; Donaghy, Daniel J.; Cranston, Lydia M.; Edwards, Grant R.; Chapman, David F.
Source:
Animal production science 2017 v.57 no.7 pp. 1289-1296
ISSN:
1836-0939
Subject:
Lolium perenne; animals; botanical composition; breeding; cultivars; endophytes; farmers; forage quality; genetic improvement; grazing; host plants; insect pests; milk production; new variety; pastures; production technology; temperate zones
Abstract:
... Results of studies designed to determine whether or not differences measured among perennial ryegrass cultivars in small-plot studies translate into differences in milk production and profit in dairy whole-system studies were reviewed. Only three experiments were identified that met the criteria for fully self-contained systems repeated over multiple years required to account for annual feed suppl ...
DOI:
10.1071/AN16524

6. The economic value to dairy systems of genetic gains in the nutritive value of perennial ryegrass in grass–clover pastures

Author:
Wims, C. M.; Ludemann, C. I.; Phillips, H.; Chapman, D. F.
Source:
Animal production science 2017 v.57 no.7 pp. 1357-1365
ISSN:
1836-0939
Subject:
Lolium perenne; botanical composition; breeding; cultivars; diploidy; economic valuation; farm profitability; farmers; financial economics; flowering; genetic improvement; grazing; leaves; metabolizable energy; pastures; spring; tetraploidy; tillers; New Zealand
Abstract:
... Perennial ryegrass (Lolium perenne L.) breeding efforts have focussed on improving pasture nutritive value by altering flowering behaviour and increasing ploidy. However, the gains in farm profitability that this has delivered are not known. The flowering behaviour, botanical composition and nutritive value of pastures based on 24 perennial ryegrass cultivar–endophyte combinations released in New ...
DOI:
10.1071/AN16487

7. Using a ‘network of practice’ approach to match grazing decision-support system design with farmer practice

Author:
Eastwood, C. R.; Dela Rue, B. T.; Gray, D. I.
Source:
Animal production science 2017 v.57 no.7 pp. 1536-1542
ISSN:
1836-0939
Subject:
business enterprises; computer software; dairy farming; decision making; decision support systems; farm corporations; farmers; farming systems; governance; grazing; grazing management; interviews; irrigation; pastures; professionals; qualitative analysis; systems engineering; New Zealand
Abstract:
... The use of pasture measurement tools and decision-support systems (DSS) for grazing management remains limited on New Zealand dairy farms. However, effective use of such tools provides opportunities to optimise pasture grown and pasture harvested. The present study used a mixed-method qualitative research approach to investigate pasture data and technology use for grazing decision making, through ...
DOI:
10.1071/AN16465