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Feeding and lying behavior of heat-stressed early lactation cows fed low fiber diets containing roughage and nonforage fiber sources.
J Dairy Sci. 2015 Feb; 98(2):1110-8.JD

Abstract

In addition to reduced nutrient intake, an environmental thermal load may directly affect milk yield in heat-stressed dairy cows. Feeding and lying behaviors of early lactation cows fed low fiber diets containing neutral detergent fiber (NDF) from roughage and nonforage fiber sources (NFFS) were investigated under summer conditions in Thailand. Immediately after calving, 30 multiparous cows (87.5% Holstein × 12.5% Sahiwal) were randomly allocated to dietary treatments for 63 d in a completely randomized design. The dietary treatments contained 25% of dry matter (DM) as dietary NDF. The control diet consisted of 13.9% roughage NDF from rice straw (RS). Two additional treatments were created by replacing 3.9% of DM with NDF from either soy hulls (SH) or cassava (Manihot esculenta Grantz) residues (CR), so that the roughage NDF content was reduced to 10%. During the experimental period, the minimum and maximum temperature-humidity indices (THI) were 86.4±2.5 and 91.5±2.7 during the day and 74.2±2.1 and 81.0±2.5 during the night, respectively, indicating conditions appropriate for induction of extreme heat stress. The duration of feeding and lying bouts decreased linearly with increasing THI. The DM intake during the day was greater for cows fed diets containing SH and CR than for those fed the diet containing NDF from RS. The number of meals during the day and night was lower, whereas meal size and meal length during the day and night were greater for cows fed diets containing SH and CR. Cows fed diets containing SH and CR lay down less frequently and longer during the day. These results suggest that under the severe heat stress during the day, early lactation cows fed the diet containing NFFS increased DM intake by increasing meal length and meal size rather than by increasing meal frequency and they spent more time lying. Cows fed diets containing NDF from SH and CR produced more 4% fat-corrected milk, lost less body weight, and had lower rectal temperatures measured at the 1530h milking. Therefore, reducing the filling effect may contribute to reducing heat load derived from the change in feeding and lying behavior. This should be considered as a factor for impairing productivity of heat-stressed early lactation cows.

Authors+Show Affiliations

Department of Animal Science at Kampaengsaen, Kasetsart University, Kampaengsaen, Nakornpathom, 73140, Thailand. Electronic address: agrjck@ku.ac.th.Department of Animal Science at Kampaengsaen, Kasetsart University, Kampaengsaen, Nakornpathom, 73140, Thailand.Department of Animal Science at Kampaengsaen, Kasetsart University, Kampaengsaen, Nakornpathom, 73140, Thailand.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25497805

Citation

Kanjanapruthipong, J, et al. "Feeding and Lying Behavior of Heat-stressed Early Lactation Cows Fed Low Fiber Diets Containing Roughage and Nonforage Fiber Sources." Journal of Dairy Science, vol. 98, no. 2, 2015, pp. 1110-8.
Kanjanapruthipong J, Junlapho W, Karnjanasirm K. Feeding and lying behavior of heat-stressed early lactation cows fed low fiber diets containing roughage and nonforage fiber sources. J Dairy Sci. 2015;98(2):1110-8.
Kanjanapruthipong, J., Junlapho, W., & Karnjanasirm, K. (2015). Feeding and lying behavior of heat-stressed early lactation cows fed low fiber diets containing roughage and nonforage fiber sources. Journal of Dairy Science, 98(2), 1110-8. https://doi.org/10.3168/jds.2014-8154
Kanjanapruthipong J, Junlapho W, Karnjanasirm K. Feeding and Lying Behavior of Heat-stressed Early Lactation Cows Fed Low Fiber Diets Containing Roughage and Nonforage Fiber Sources. J Dairy Sci. 2015;98(2):1110-8. PubMed PMID: 25497805.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Feeding and lying behavior of heat-stressed early lactation cows fed low fiber diets containing roughage and nonforage fiber sources. AU - Kanjanapruthipong,J, AU - Junlapho,W, AU - Karnjanasirm,K, Y1 - 2014/12/12/ PY - 2014/03/21/received PY - 2014/10/29/accepted PY - 2014/12/16/entrez PY - 2014/12/17/pubmed PY - 2015/8/19/medline KW - early lactation cow KW - feeding behavior KW - heat stress KW - lying behavior SP - 1110 EP - 8 JF - Journal of dairy science JO - J Dairy Sci VL - 98 IS - 2 N2 - In addition to reduced nutrient intake, an environmental thermal load may directly affect milk yield in heat-stressed dairy cows. Feeding and lying behaviors of early lactation cows fed low fiber diets containing neutral detergent fiber (NDF) from roughage and nonforage fiber sources (NFFS) were investigated under summer conditions in Thailand. Immediately after calving, 30 multiparous cows (87.5% Holstein × 12.5% Sahiwal) were randomly allocated to dietary treatments for 63 d in a completely randomized design. The dietary treatments contained 25% of dry matter (DM) as dietary NDF. The control diet consisted of 13.9% roughage NDF from rice straw (RS). Two additional treatments were created by replacing 3.9% of DM with NDF from either soy hulls (SH) or cassava (Manihot esculenta Grantz) residues (CR), so that the roughage NDF content was reduced to 10%. During the experimental period, the minimum and maximum temperature-humidity indices (THI) were 86.4±2.5 and 91.5±2.7 during the day and 74.2±2.1 and 81.0±2.5 during the night, respectively, indicating conditions appropriate for induction of extreme heat stress. The duration of feeding and lying bouts decreased linearly with increasing THI. The DM intake during the day was greater for cows fed diets containing SH and CR than for those fed the diet containing NDF from RS. The number of meals during the day and night was lower, whereas meal size and meal length during the day and night were greater for cows fed diets containing SH and CR. Cows fed diets containing SH and CR lay down less frequently and longer during the day. These results suggest that under the severe heat stress during the day, early lactation cows fed the diet containing NFFS increased DM intake by increasing meal length and meal size rather than by increasing meal frequency and they spent more time lying. Cows fed diets containing NDF from SH and CR produced more 4% fat-corrected milk, lost less body weight, and had lower rectal temperatures measured at the 1530h milking. Therefore, reducing the filling effect may contribute to reducing heat load derived from the change in feeding and lying behavior. This should be considered as a factor for impairing productivity of heat-stressed early lactation cows. SN - 1525-3198 UR - https://www.unboundmedicine.com/medline/citation/25497805/Feeding_and_lying_behavior_of_heat_stressed_early_lactation_cows_fed_low_fiber_diets_containing_roughage_and_nonforage_fiber_sources_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(14)00828-5 DB - PRIME DP - Unbound Medicine ER -