Utjecaj duljine suhostaja na zdravlje i proizvodnost mliječnih krava

master's thesis

• Title (english): Effect od dry period length on health and production of dairy cows
• Author: Anita Pušić
• Mentor: Antun Kostelić (mentor)
• Committee member: Antun Kostelić (predsjednik povjerenstva)
• Committee member: Krešimir Salajpal (član povjerenstva)
• Committee member: Bruna Tariba (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Animal Science); Zagreb
• Defense date and country: 2019-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Primarni cilj uzgajivača mliječnih krava je održati visoku proizvodnju mlijeka. Smatra se da je suhostaj neophodan za postizanje maksimalne proizvodnje. Međutim, suhostaj predstavlja neprofitno razdoblje uzgoja, zbog čega je ključno utvrditi najkraći period koji bi u isto vrijeme smanjio troškove i omogućio maksimalnu proizvodnju. Kraći ili duži suhostaj od standardnog povezan je sa smanjenom proizvodnjom mlijeka i većim rizikom od pojave raznih metaboličkih i reproduktivnih problema tijekom suhostaja ili neposredno nakon teljenja. Neovisno o duljini suhostaja, za uspješnu provedbu i umanjenu vjerojatnost pojave metaboličkih i reproduktivnih bolesti, obavezna je pravilna hranidba, tjelesna kondicija, smještaj i terapija u suhostaju. Duži suhostaj smatra se ekonomski neisplativim, unatoč rezultatima koja pokazuju veći prinos mlijeka. Prema brojnim istraživanjima suhostaj se može skratiti na 40 dana bez štetnih posljedica na zdravlje i proizvodnju, no daljnje skraćivanje nije potpuno istraženo i rezultati su različiti. Svakako su potrebna daljnje procjene utjecaja skraćenog suhostaja na dugoročno zdravlje, proizvodnju, plodnost i dugovječnost mliječnih krava.

Abstract (english)

The primary goal of dairy farmers is to maintain high milk production. Dry period is considered essential for maximizing the production. However, dry period is also a non-profit period, which is why it is crucial to establish the shortest period that would at the same time reduce costs and maximize milk production. Shorter or longer dry period compared to a standard one is associated with reduced milk production and a higher risk of various metabolic and reproductive problems during dry period or immediately after calving. Regardless of the length, proper nutrition, body condition score, housing and therapy are required for a successful implementation and reduced likelihood of metabolic and reproductive diseases. Longer dry period is not considered to be economically viable, despite the results showing higher milk yield. According to numerous studies, dry period can be reduced to 40 days without adverse effects on health and production, but further shortening of days dry has not been fully investigated and the results are different. Further assessments of the effects on shortened dry period on the long term health, production, fertility and longevity of dairy cows are certainly needed.

• Keywords: krave; duljina suhostaja; bolesti; proizvodnja
• Keywords (english): cows; dry period length; diseases; production
• Language: croatian
• URN:NBN: urn:nbn:hr:204:635793
• Study programme: Title: Animal Genetics and Breeding; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka genetike i oplemenjivanja životinja (magistar/ magistra inženjer/inženjerka genetike i oplemenjivanja životinja)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2019-12-03 13:40:19