Effect of fan placement on milk production and dry matter intake of lactating dairy cows housed in a 4-row freestall barn

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dc.contributor.author Smith, J.F.
dc.contributor.author Harner, Joseph P.
dc.contributor.author DeFrain, S.E.
dc.contributor.author Brouk, Michael J.
dc.date.accessioned 2010-12-10T17:41:36Z
dc.date.available 2010-12-10T17:41:36Z
dc.date.issued 2010-12-10
dc.identifier.uri http://hdl.handle.net/2097/6882
dc.description.abstract Heat stress reduces milk production, feed intake, and reproductive efficiency each summer in Kansas. Without heat abatement procedures, milk production may decline 20- 30% during the summer months. Research has shown that supplemental fan cooling in combination with low pressure feedline sprinklers can reduce the effects of heat stress on milk production and feed intake. One critical issue in heat stress abatement is the location of fans in a 4-row freestall barn. Research conducted during the summer of 2000 on a northeast Kansas dairy found that locating fans over both the feedline and head-to-head freestalls increased milk production 5.8 lb/cow/d and reduced respiration rates in the morning and at night compared to mounting fans only over the feedline. Pen feed intakes also tended to be greater when fans were located in both areas. Economic analysis showed that after accounting for cost associated with ownership, operation, and increased feed intake, net farm income was estimated to be increased by $3,600- 6,600 for a pen of 84 cows. A 100-cow Kansas dairy could increase farm profits by $8,000 if these heat abatement techniques were utilized. Location of fans over both the feedline and freestalls in combination with a low pressure feedline sprinkling system is an effective heat stress abatement strategy in 4- row freestall barns. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Dairy Day, 2001 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 02-133-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 881 en_US
dc.subject Dairy en_US
dc.subject Heat stress en_US
dc.subject Cow comfort en_US
dc.subject Cow cooling en_US
dc.title Effect of fan placement on milk production and dry matter intake of lactating dairy cows housed in a 4-row freestall barn en_US
dc.type Conference paper en_US
dc.date.published 2001 en_US
dc.citation.epage 10 en_US
dc.citation.spage 4 en_US
dc.contributor.authoreid mbrouk en_US
dc.contributor.authoreid jfsmith en_US
dc.contributor.authoreid jharner en_US

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