אסיף מאגר המחקר החקלאי

Lactation performance and feeding behavior of dairy cows supplemented via automatic feeders with soy hulls or barley based pellets

Year:

2004

Source of publication :

Authors :

Volume :

87

Co-Authors:

Miron, J., Institute of Animal Science, Department of Dairy Science, ARO, Bet Dagan, Israel
Nikbachat, M., Institute of Animal Science, Department of Dairy Science, ARO, Bet Dagan, Israel
Zenou, A., Institute of Animal Science, Department of Dairy Science, ARO, Bet Dagan, Israel
Ben-Ghedalia, D., Institute of Animal Science, Department of Dairy Science, ARO, Bet Dagan, Israel
Solomon, R., Israeli Ministry of Agriculture, Extension Service, Bet Dagan, Israel
Shoshani, E., Israeli Ministry of Agriculture, Extension Service, Bet Dagan, Israel
Halachmi, I., Inst. of Agricultural Engineering, ARO, Bet Dagan, Israel
Livshin, N., Inst. of Agricultural Engineering, ARO, Bet Dagan, Israel
Antler, A., Inst. of Agricultural Engineering, ARO, Bet Dagan, Israel
Maltz, E., Inst. of Agricultural Engineering, ARO, Bet Dagan, Israel

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Abstract:

The potential of soy hulls to replace barley grain in pellets supplemented to lactating cows was measured in automatic concentrate feeders (ACF). Thirty-six cows were divided into 2 equal groups and fed 1 of the 2 experimental pellet supplements individually for 7 wk. All cows were group-fed a basic mixture along the feeding lane (∼64% of dietary DM) plus a pelleted additive containing 50% barley or soy hulls as barley replacer, fed individually to each cow via the ACF in 6 feeding windows. Extent and rate of in vitro DM digestibility were similar for both types of pellets; however, NDF content and digestibility were higher in the soy hulls pellets. Average number of rewarded cow visits at the ACF, pellets intake per meal, and accumulated intake of pellets (8.64 kg/d DM) were similar in the 2 experimental groups. Most pellets were consumed during day and night in the first 2 h after feeding windows were opened. Total visits per day in the ACF and the maximal interval between visits were similar for the 2 pellets, indicating similar attractiveness to the cow. Predicted intake of the basic mixture was similar in both groups (14.8 to 15.1 kg of DM/d). Higher milk fat content was observed in the soy hulls-fed cows, whereas higher milk protein content was found in the barley-fed cows. Milk yield was similar in both groups. Data suggest that replacement of barley pellets with soy hulls pellets may slightly enhance milk fat while reducing milk protein production for dairy herds using automatic milking systems.

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