|
|
|
|
|
| Mogensen, Lisbeth; Kristensen, Troels; Danfær, Allan. |
| In 2005, 100% organically grown feed become a requirement for all organic dairy cows in EU. To create a better understanding of which effect introducing 100% organically grown feed will have on the whole farming system, six production strategies was set up and the effects on productivity, environment effect and economy were analysed. The strategies differ with respect to type of concentrated feed, level of fresh grass-clover in the ration and length of the calving interval. It was found that supplement of cereal, rapeseed/cereals or grass pellets gave very similar productivity and economic result, but supplement of rapeseed cake reduced crop production and economic result. Increased level of grazing has a smaller positive effect on the economic result. On... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle. |
| Ano: 2007 |
URL: http://orgprints.org/6033/1/6033.doc |
| |
|
| |
|
|
| Christiansen, Hans Christian; Danfær, Allan; Sehested, Jakob. |
| En forlængelse af laktationsperioden og dermed kælvningsintervallet til 18 måneder giver mulighed for øget andel af grovfoder i rationen. Det skyldes, at der bliver forholdsvis færre dage i tidlig laktation, hvor tildelingen af koncentreret foder er størst. Et længere kælvningsinterval betyder endvidere færre golddage per årsko, idet antal golddage per laktation var uændret. En forlængelse af kælvningsintervallet betød, at laktationsydelsen steg fra 7.656 til 11.516 kg EKM. Omregnet til ydelse per årsko giver det 7.635 versus 8.006 kg EKM ved det forlængede kælvningsinterval, altså en stigning på 371 kg EKM sammenlignet med et traditionelt kælvningsinterval. Et normalt foderniveau er en forudsætning for at opnå denne ydelsesstigning ved at forlænge... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Production systems. |
| Ano: 2005 |
URL: http://orgprints.org/10010/1/10010.pdf |
| |
|
|
|
