Roughage based feeding strategy for organic dairy goats to increase wholesome milk components for human nutrition
Goats select most valuable feed components from roughage and pasture to optimize their feed ration. Goats are able to adopt different feeding materials. Due to their ability to browse bushes and trees goats are often used in landscape perservation. The adavantage of theri digestion and capabilty to utilize roughage as good as possible predestines them for feeding minimum concentrates. It has to be discussed which feeding strategies are most likely to increase essential fatty acids, Vitamin E and antioxidants in goat's milk.
Objective of the project is an application of a pasture-based feeding system to increase the contents of essential fatty acids, conjugated linoleic acid (CLA), vitamin E, xanthophylls and antioxidants in goat's milk and cheese.
The concentrate ratio will be as low as possible to maximise roughage intake from pasture and hay. Goats as intermediate ruminants (IM) are predestined to select the best diet. Chemical analysis of the nutritionally beneficial components will be carried out by GC and HPLC procedures at MRI.
In a preliminary study we evaluated effects of a low concentrate diet of maximum 10 % of the total annual dry matter intake per dairy goat (KF10) compared to a 40 % diet (KF40). As was expected, milk yield of KF10-group was lower, but fatty acid composition was more valuable using less concentrates. Omega-3 fatty acid and conjugated linoleic acid (CLA) were found to be significantly higher in the milk of the KF10 dairy goat group throughout the whole lactation.
11.2012 - 10.2015
Project status: ongoing