Many businesses have already collected winter barley, and ponder, when you can start to feed the new crop of pigs. Especially when a shortage of raw materials are inclined to farmers, to start to use fresh corn.
Often recommend the use of grain only after storage for at least four to six weeks, because they fear problems with digestion and reduced feed palatability. known, that the grain after the harvest for some time yet ripen, during which there is a high contamination of the surface of the grain. In the middle there is accumulation of water weevil, corn "sweats". Starch and protein goes through the "aging process". In consequence of this splitting of these nutrients is reduced, which has a positive effect on animal digestion.
In what extent does reduced feed palatability, No accurate research data. There is also no definitive guidance on the minimum time necessary freshly grain storage prior to its feeding, because the data could not be found on the conducted experiments on animals. One experience in pigs for fattening of the '70s with a fresh barley has not led to problems. In a new experience Bavarian Agricultural Service were fed fresh batch of dry barley and wheat piglets.
Health problems or recessions productivity has not been established. but the group, which is fed exclusively with fresh grain in the first three weeks, from the very beginning showed the complexity, therefore, the use of fresh corn in feeding piglets immediately after weaning is not recommended. For security the proportion of fresh grain (barley and wheat) according to the experimental station may be at most 50% (the younger piglets, the less). It really provided, that feed hygiene constantly monitors. It is generally believed, that the risks involved in the direct feeding is much lower with proper dry storage (maximally 14% humidity, temperature of maximum 14 ° with, Adequate ventilation and cleaning the harvest) or preservation acids. Through the action of the acid activity of enzymes or metabolic activity of bacteria and fungi in grain or Dirty, eg, rapidly decreases, thereby feeding fresh grain could be implemented immediately without any problems.
Digestive problems animals, which repeatedly have been obtained in practice it is likely to have been caused by inadequate storage and preservation, eg, as a consequence of the reheating ("Sweating" process), It begins when bacterial metabolism. If a farmer wants to avoid possible risks, it should be fed only dry grain in a few weeks, or at least dilute its quality grain harvest last. Canned corn acids can be used after only a few days. Possible downs in palatability due to degassing acid.
After the harvest in the first days and weeks in the grain ripening process takes place. This refers mainly colloidal processes, occurring in the grain. This releases water: corn "sweats". Sweating grain can also be found then, when it has a dry matter content was found, satisfying the storage requirements. Кроме того, when harvested and immediately after, enzyme activity in grains is very low and only later rises again.
In some types of grain maturation is characterized by greatly reduced the power of the embryo. Corn, which is in the process of "sweating", ill-suited for animal feed. Be reckoned with digestive disorders, who in t. no. lead to lower productivity.
especially the need of the individual animal species mentioned sensitivity to the "fresh grain" pigs and horses. First of all, feeding freshly rye leads to significant health disorders and reduced productivity. research, conducted on piglets weaned, fed freshly rye, and rye, which was kept for a long time, showed a distinct increase in microbial activity in the stomach and small intestine of animals when fed fresh rye (Bolduan et al., 1987). First of all, when fed a high proportion of fresh rye in compound feed diseases of the digestive tract and bone resorption susceptible young and weakened adult animals.
Due to a bad experience when fed fresh grain, better to start their application after 4 weeks of storage. If this is not possible, the proportion of fresh grain in compound feeds for different animal species should be limited to a maximum of 30% (cm. table 1). This restriction also applies for direct feeding of fresh grain.
Table 1. Guidelines for the maximum allowable number of different crops in feed or total diet (%)