Forage displacement
As basic feed displacement , the fact is known that milk cows do not concentrate in addition to the basic feed record, but that this part of the basic feed is displaced from the ration.
reasons
On the one hand, the capacity of the digestive tract is limited; on the other hand, there is a change in the rumen environment . The acid production in the rumen is stimulated by concentrated feed, which results from the fermentation of the non-fiber carbohydrates in the concentrated feed. This acid damages precisely the rumen microbes that specialize in breaking down structural substances. This results in poorer digestibility of the basic forage and a longer retention time in the rumen. In addition, the energy supply of the cow usually increases with the feeding of concentrated feed. However, maintaining a balanced energy balance is the most important criterion for controlling the amount of feed.
Orders of magnitude
- With 1 kg of concentrate intake, 14 kg of dry matter of basic feed (silage, hay) are eaten. With 10 kg of concentrated feed, the basic feed intake drops to 10 kg of dry matter. The basic feed intake decreases from around 4 kg of concentrate per day.
- Other sources speak of a decrease of 0.51 kg dry matter basic feed intake with 1 kg dry matter concentrate intake. With dry matter content of grass silage of around 33%, this corresponds to a displaced fresh mass of around 1.5 kg of grass silage compared to 1.1 kg of fresh mass of concentrated feed.
- The basic feed displacement fluctuates between 0.3 and 0.8 kg DM basic feed per kg DM concentrated feed, depending on the feed components. It was determined that the displacement of basic forage is higher in the case of maize silage, starch-rich concentrate and high amounts of concentrate.
Connections
The displacement of forage depends on both the quality of the forage and the number of lactations the cow has. The displacement of forage is more pronounced in higher lactating cows than in first calves.
Web links
- Gruber, L. et al .: Prediction of feed intake by dairy cows. In: Forum for Applied Research. March 24/25, 2004 (PDF; 1.17 MB)
Individual evidence
- ↑ a b c On the efficiency of concentrate use in dairy cattle feeding - an overview, Leonard Gruber LFZ Raumberg-Gumpenstein, Institute for Livestock Research
- ↑ Wangsness & Muller 1981
- ↑ According to Kirchgeßner (2004)
- ↑ Lexicon of agricultural terms on bewital-agrar.de ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ^ Dow Chemical Company on Grass Silage ™ levels
- ↑ Uni Kiel, dissertation Huettmann 2007 according to Schwarz and Kirchgessner (1985) ( Memento of the original from May 8, 2010 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 4.3 MB)
