Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik
The aim of the study was to compare two feeding strategies, partial mixed ration (PMR) and separate feeding (SR) of grass/clover silage and concentrate, and find out how feed intake, milking frequency and milk production was affected when the cows were milked in an automatic milking system (AMS) wit...
| Autor principal: | |
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| Formato: | Second cycle, A2E |
| Lenguaje: | sueco sueco |
| Publicado: |
2017
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| Acceso en línea: | https://stud.epsilon.slu.se/9937/ |
| _version_ | 1855571611477868544 |
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| author | Driscoll, Hanna |
| author_browse | Driscoll, Hanna |
| author_facet | Driscoll, Hanna |
| author_sort | Driscoll, Hanna |
| collection | Epsilon Archive for Student Projects |
| description | The aim of the study was to compare two feeding strategies, partial mixed ration (PMR) and separate feeding (SR) of grass/clover silage and concentrate, and find out how feed intake, milking frequency and milk production was affected when the cows were milked in an automatic milking system (AMS) with free cow traffic. The study included 38 cows in early to mid lactation divided into two groups fed PMR or SR and lasted for ten weeks. The PMR group was fed a mix consisting of silage and concentrate, and received additional concentrate in the milking robot. The mix contained 35% concentrate and 65% silage on dry matter (DM) basis. The SR group was offered silage in feed troughs and concentrate was supplied both in concentrate dispensers and in the robot during milking. All cows were fed according to the standards for organic milk production, i.e. up to 90 days in milk they received maximum 50% of total DMintake in the form of concentrate and after 90 days in milk they received maximum 40% concentrate. Cows with more than 13 hours milking interval were fetched manually at four set times each day. Cows in the PMR group voluntarily visited the milking robot significantly more often than the SR cows, in average 2.6 and 2.3 times per day, respectively. Fewer cows needed to be fetched manually in PMR compared with SR. When comparing the cell count, milk yield and milk composition there were no differences between the groups: 50 × 10³ and 31×10³ cells/ml, 35.0 and 35.4 kg energy corrected milk, 4.12 and 4.05 % milk fat and 3.44 and 3.47 % milk protein, in PMR and SR, respectively. The PMR group consumed significantly more feed than the SR group, 26.8 and 24.0 kg DM per cow and day, respectively, but no differences in body weight change or change in body condition were detected between the groups. The reason for higher intake in the PMR group may be that the mix was more palatable to the cows compared to silage. The higher milking frequency in the PMR group may be due to increased motivation to visit the robot since it was the only place where they could find concentrate. |
| format | Second cycle, A2E |
| id | RepoSLU9937 |
| institution | Swedish University of Agricultural Sciences |
| language | Swedish swe |
| publishDate | 2017 |
| publishDateSort | 2017 |
| record_format | eprints |
| spelling | RepoSLU99372017-01-27T14:54:13Z https://stud.epsilon.slu.se/9937/ Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik Driscoll, Hanna Animal husbandry Animal feeding The aim of the study was to compare two feeding strategies, partial mixed ration (PMR) and separate feeding (SR) of grass/clover silage and concentrate, and find out how feed intake, milking frequency and milk production was affected when the cows were milked in an automatic milking system (AMS) with free cow traffic. The study included 38 cows in early to mid lactation divided into two groups fed PMR or SR and lasted for ten weeks. The PMR group was fed a mix consisting of silage and concentrate, and received additional concentrate in the milking robot. The mix contained 35% concentrate and 65% silage on dry matter (DM) basis. The SR group was offered silage in feed troughs and concentrate was supplied both in concentrate dispensers and in the robot during milking. All cows were fed according to the standards for organic milk production, i.e. up to 90 days in milk they received maximum 50% of total DMintake in the form of concentrate and after 90 days in milk they received maximum 40% concentrate. Cows with more than 13 hours milking interval were fetched manually at four set times each day. Cows in the PMR group voluntarily visited the milking robot significantly more often than the SR cows, in average 2.6 and 2.3 times per day, respectively. Fewer cows needed to be fetched manually in PMR compared with SR. When comparing the cell count, milk yield and milk composition there were no differences between the groups: 50 × 10³ and 31×10³ cells/ml, 35.0 and 35.4 kg energy corrected milk, 4.12 and 4.05 % milk fat and 3.44 and 3.47 % milk protein, in PMR and SR, respectively. The PMR group consumed significantly more feed than the SR group, 26.8 and 24.0 kg DM per cow and day, respectively, but no differences in body weight change or change in body condition were detected between the groups. The reason for higher intake in the PMR group may be that the mix was more palatable to the cows compared to silage. The higher milking frequency in the PMR group may be due to increased motivation to visit the robot since it was the only place where they could find concentrate. Syftet med studien var att jämföra två utfodringsstrategier, blandfoder (PMR) samt separat utfodring (SR) av ensilage och kraftfoder, och ta reda på hur foderintaget, mjölkningsfrekvensen och mjölkproduktionen påverkades när korna mjölkades i ett automatiskt mjölkningssystem (AMS) med fri kotrafik. Trettioåtta kor i tidig- till mittlaktation fördelade på två grupper, PMR och SR, ingick i studien som pågick i tio veckor. Korna i PMR gruppen utfodrades med en mix bestående av ensilage och kraftfoder samt kraftfoder i roboten vid mjölkning. Mixen innehöll 35 % kraftfoder och 65 % ensilage på torrsubstans (TS) basis. Korna i SR gruppen utfodrades med ensilage i fodertråg och kraftfoder i både kraftfoderautomat samt i roboten vid mjölkning. Alla kor utfodrades enligt reglerna för ekologisk produktion, dvs. fram till 90 laktationsdagar fick de max 50 % av totala TS intaget i form av kraftfoder och efter 90 laktationsdagar maximalt 40 % kraftfoder. Kor med ett mjölkningsintervall längre än 13 timmar hämtades till mjölkning manuellt vid fyra fasta tidpunkter varje dag. Kor i grupp PMR besökte mjölkningsroboten signifikant oftare än grupp SR, 2,6 respektive 2,3 gånger per dag. Färre kor behövde hämtas manuellt i PMR jämfört med SR. Vid jämförelse av celltal, mjölkavkastning samt fett- och proteinhalt i mjölken var det ingen skillnad mellan grupperna: 50 × 10³ och 31 ×10³ celler/ml, 35,0 och 35,4 kg energikorrigerad mjölk, 4,12 och 4,05 % fett samt 3,44 och 3,47 % protein, för PMR respektive SR. Grupp PMR konsumerade signifikant mer foder än SR, 26,8 respektive 24,0 kg TS per ko och dag, men inga skillnader i vikt- eller hullförändring mellan grupperna kunde påvisas. Orsaken till att kor i grupp PMR konsumerade signifikant mer foder kan vara att mixen var mer smaklig jämfört med ensilage. Att kor i PMR hade en högre mjölkningsfrekvens kan bero på att de hade en högre motivation till att besöka mjölkningsroboten eftersom det var det enda stället där de hade tillgång till kraftfoder. 2017-01-27 Second cycle, A2E NonPeerReviewed application/pdf sv https://stud.epsilon.slu.se/9937/1/driscoll_h_170127.pdf Driscoll, Hanna, 2017. Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik. Second cycle, A2E. Uppsala: (VH) > Dept. of Animal Nutrition and Management (until 231231) <https://stud.epsilon.slu.se/view/divisions/OID-650.html> urn:nbn:se:slu:epsilon-s-6192 swe |
| spellingShingle | Animal husbandry Animal feeding Driscoll, Hanna Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik |
| title | Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik |
| title_full | Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik |
| title_fullStr | Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik |
| title_full_unstemmed | Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik |
| title_short | Blandfoder eller separat utfodring till mjölkkor i AMS med fri kotrafik |
| title_sort | blandfoder eller separat utfodring till mjölkkor i ams med fri kotrafik |
| topic | Animal husbandry Animal feeding |
| url | https://stud.epsilon.slu.se/9937/ https://stud.epsilon.slu.se/9937/ |