My current research program has 3 primary components. One area is a field study using commercial dairy herds to examine the relationships between nutrition, herd management and milk components. Dairy herds are selected to obtain a range of milk fat and protein levels. A herd visit is made and detailed information is obtained relative to the forages and ration being fed. The goal is identify some factors influencing milk components in these herds that could be used in the evaluation of other herds. A second area is examining the efficiency of nitrogen use in dairy cattle. The primary approach is to work with consultants to identify herds with the potential for lowering ration protein levels. The Cornell Net Carbohydrate and Protein System (CNCPS) model will be used to both evaluate the current ration and to reformulate the ration to decrease ration protein and decrease nutrient excretion. Another project in this area involves looking at the daily variation in bulk tank milk urea nitrogen (MUN) as an index of overall herd management. The third current area is evaluating the impact of fiber digestibility in corn silage on dry matter intake and milk production in dairy cows. Corn silage hybrids were selected for differences in fiber digestibility and grown in the same field for this trial. These hybrids will be fed to lactating dairy cows to assess potential differences in dry matter intake, milk production and ratio digestibility.
Cerosal;etti, P.E., D.G. Fox and L.E. Chase. 2004. Phosphorus reduction through precision feeding of dairy cattle.
Chase, L.E., L.O. Ely and M.F. Hutjens. 2006. Major advances in extension education programs in dairy production, J. Dairy Sci. 89:1147-1154.
Ketterings, Q.M., E. Frenay, J.H. Cherney, K.J. Czymmek, S.D. Klausner, L.E. Chase and Y.H. Shukken. 2007. Aplication of manure to established stands of alfalfa and alfalfa-grass. Online. Forage and Grazinglands, dol:10.1094/FG-2007-0418-01-RV
Wolfe, D.W., L. Ziska, C. Petzoldt, A. Seaman, L.E. Chase and K. Hayhoe. 2007. Projected change in climate thresholds in the Northeastern U.S.: Implications for crops, pests, livestock and farmers. Online. Mitigation and Adaptation Strategies for G;pbal Change. Dol:10.1007/s11027-007-9125-2
Dou, Z., C.F. Ramberg, L. Chapuis-Lardy, J.D. Toth, Y. Wand, R.J. Munson, Z. Wu, L.E. Chase, R.A. Kohn, K.F. Knowlton and J.D. Ferguson. 2007. A novel test for measuring potential phosphorus loss from dairy cattle feces. Environ. Sci. Technol. 41:4361-4366.
Tylutki, T.P., D.G. Fox, V.M. Durbal, L.O. Tedeschi, J.B. Russell, M.E. Van Amburgh, T.T. Overton, L.E. Chase and A.N. Pell. 2008. Cornell Net Carbohydrate and ProteinSystem: A model for precision feeding of dairy cattle. Anim. Feed Sci. Tech. 143:174-202.