Effect of adding Chinese wildrye or alfalfa to wet corn gluten feed during fermentation
2015
Chun-Fang, P. (Northeast Agricultural Univ. (China). Coll. of Animal Science and Technology) | Guang-Qian, L. (Heilongjiang Academy of Land Reclamation Sciences, Harbin (China)) | Li, Y. (Northeast Agricultural Univ. (China). Coll. of Animal Science and Technology) | Kai-Yu, L. | Chun-Lei, L. | Yong-Gen, Z.
The objective of this experiment was to determine the fermentation quality of wet corn gluten feed ensiled alone and treated with Chinese wildrye or alfalfa using different concentrations. Two experiments were performed to investigate the fermentation profile of wet corn gluten feed after 60 days of anaerobic storage in plastic model silos. Wet corn gluten feed was ensiled alone and mixed with Chinese wildrye (10%, 20% and 30%) or alfalfa (10%, 20% and 30%). The wet corn gluten feed ensiled alone was the control. Sampling was performed on the 60th day after ensiling for fermentation quality and chemical analysis. The results showed very low fermentation intensity, that high levels of lactic acid dominated the fermentation of wet corn gluten feed ensiled alone, and the pH increased during fermentation with Chinese wildrye or alfalfa at different rations. Ammonia-nitrogen was highest for wet corn gluten feed ensiled alone, decreasing as the Chinese wildrye concentration increased, and increasing as the alfalfa concentration increased. Adding of 30% Chinese wildrye to wet corn gluten feed or 10% alfalfa significantly increased acetic acid production, which improved aerobic stability and reduced the lactic acid: acetic acid ratio relative to the control. In conclusion, organic acid fermentation of wet corn gluten feed ensiled alone was low. Adding 30% Chinese wildrye to wet corn gluten feed is recommended to reduce dry matter loss and improve aerobic stability. Adding 10% alfalfa to wet corn gluten feed is recommended to improve aerobic stability.
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