Učinak dodatka prehrani zeolita klinoptilolita na broj somatskih stanica, zdravlje vimena i kemijski sastav mlijeka u krava holštajnske pasmine

master's thesis

• Title (english): The Influence of Dietary Zeolite Clinoptilolite Supplementation on Somatic Cell Count, Udder Health and Chemical Composition of Milk in Holstein-Friesian Cows
• Author: Tihana Josipović
• Mentor: Dražen Đuričić (mentor)
• Mentor: Romana Turk (mentor)
• Committee member: Marko Samardžija (predsjednik povjerenstva)
• Committee member: Dražen Đuričić (član povjerenstva)
• Committee member: Romana Turk (član povjerenstva)
• Granter: University of Zagreb; Faculty of Veterinary Medicine; (Reproduction and Obstetrics Clinic); Zagreb
• Defense date and country: 2019-11-22, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Veterinary Medicine; Veterinary Clinical Sciences

Abstract

U mliječnoj govedarskoj industriji posljednjih se godina nameće potreba za korištenjem alternativnih dodataka u prehrani mliječnih krava koji bi zamijenili ne tako davno zabranjenu upotrebu antibiotika u svrhu kvalitetnije proizvodnje mlijeka i boljeg zdravlja plotkinja. Cilj ovog istraživanja bio je utvrditi učinkovitost dodavanja vibroaktiviranog i mikroniziranog zeolita klinoptilolita (Vibrosorb®, Podpićan, Hrvatska) u hrani na kemijski sastav mlijeka i zdravlje vimena mliječnih krava. U istraživanje je bilo uključeno 30 mliječnih krava holštajn-frizijske pasmine dobi od 3 do 5 godina, gravidnih 3 mjeseca u početku provođenja projekta. Životinje su bile držane na obiteljskom gospodarstvu u okolici mjesta Đurđevac u Hrvatskoj. Krave su nasumično podijeljene u dvije skupine: kontrolnu (n=15) i ispitivanu (n=15) koja je u obroku za mliječne krave svakodnevno dobivala i 100g KPL-a. Prvo uzorkovanje mlijeka načinjeno je prije početka dodavanja KPL-a. Ostala četiri uzorkovanja provedena su kroz četiri mjeseca do suhostaja, tj. sedmog mjeseca gravidnosti. Uzorci mlijeka bili su analizirani s obzirom na kemijski sastav mlijeka (mliječna mast, bjelančevine, laktoza, bezmasna suha tvar i ureja), BSS i mikrobiološkom pretragom. Statističkom obradom utvrđeno je da su prosječne vrijednosti kemijskog sastava mlijeka bile podjednake u obje skupine tijekom svih mjeseci, sa zanemarivom razlikom u 5. mjesecu u KPL skupini za mliječni protein. Statistički značajna razlika je dobivena u BSS-u; KPL skupina je imala značajno manji prosjek BSS-a za razliku od KON skupine. Značajan utjecaj ostvario se i na pojavnost intramamarnih infekcija u pojedinim četvrtima vimena; KPL hranjena skupina je za 50 % imala nižu pojavu supkliničkog mastitisa u odnosu na KON skupinu. Dobivenim rezultatima može se potvrditi imunostimulacijski, antibakterijski i antioksidacijski utjecaj vibroaktiviranog i mikroniziranog klinoptilolita kao dodatka prehrani na zdravlje vimena mliječnih krava.

Abstract (english)

In recent years, there has been a wider usage of alternative substances in the diet, which replaced antibiotics for the better performance and udder health of dairy cows. This study aimed to determine the efficacy of the addition of vibroactive and micronized zeolite clinoptilolite (Vibrosorb, Podpićan, Croatia) in feed on the chemical composition of milk, somatic cell count (SCC) and the udder health of dairy cows. The research involved 30 dairy cows of the Holstein-Frisian breed, aged between 3 to 5 years, and 3 months pregnant at the start of the trial. The animals were kept on a family farm near Đurđevac, Croatia. The cows were randomly assigned into two groups: control (n = 15) and tested (CPL-fed group) (n = 15), which received 100 g of CPL in daily feed. The first milk sampling was done prior adding CPL to the diet. The other four samples were performed monthly up to the dry period, i.e., the seventh month of the pregnancy. Milk samples were analysed for the chemical composition of milk (milk fat, protein, lactose, non-fatty dry matter, and urea), SCC and microbiological examination. Statistical analysis revealed that the average values ofthe chemical composition of milk were almost the same in both groups throughout the research, with an insignificant difference in milk protein in the fifth month of research. A statistically significant difference was found in the SCC - the CPL group had a significantly lower average value of BSS as opposed to the control group. Results showed a significant influence of the CPL supplementation on the incidence of intramammary infection - The CPL-fed group had a 50% lower incidence of subclinical mastitis compared to the control group. Such a positive effect of CPL supplementation on the udder health can confirm the immunostimulatory, antibacterial and antioxidant effects of vibroactivated and micronized clinoptilolite as a dietary supplement for dairy cows.

• Keywords: mliječne krave; sastav mlijeka; zdravlje vimena; zeolit klinoptilolit
• Keywords (english): dairy cows; milk composition; udder health; zeolite clinoptilolite
• Language: croatian
• URN:NBN: urn:nbn:hr:178:279184
• Study programme: Title: Veterinary Medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor/doktorica veterinarske medicine (doktor/doktorica veterinarske medicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-11-12 08:18:43