Utjecaj razine škroba u obroku konja na in vitro fekalnu probavljivost vlakana

master's thesis

• Title (english): Effect of starch levels in horse meal on in vitro fecal fiber digestibility
• Author: Ana Bošnjak
• Mentor: Darko Grbeša (mentor)
• Committee member: Darko Grbeša (predsjednik povjerenstva)
• Committee member: Jelena Ramljak (član povjerenstva)
• Committee member: Krešimir Salajpal (član povjerenstva)
• Committee member: Marija Duvnjak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Animal Nutrition); Zagreb
• Defense date and country: 2018-02-26, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Škrob je bogatiji izvor energije za konje od vlakana, ali njegova previsoka količina u obroku narušava razgradnju u tankom crijevu, povećava fermentaciju u slijepom i debelom crijevu što može imati za posljedicu smanjenu fermentaciju vlakana i zdravstvene probleme kod konja (npr. kolike). Cilj istraživanja bio je utvrditi utjecaj različitih dnevnih razina škroba na in vitro fekalnu probavljivost neutralnih detergent vlakana i suhe tvari te da li promjene razine škroba u obroku izazivaju promjenu mikrobnog sastava fecesa konja. U pokusu postavljenom kao ponavljajući latinski kvadrat sudjelovala su tri konja prosječne tjelesne mase 650 kg i slične fizičke aktivnosti (sličan trenažni proces). Sva tri konja hranjena su s 12 kg livadnog sijena raspodijeljenog u tri obroka te krmnom smjesom sa 0,6, 1,2 i 1,8 (kg/dan/konju) iz koje su dobivali 0,3, 0,6 i 0,9 g škroba/kg tjelesne mase. Glavni ispitani utjecaji bili su razina škroba u obroku konja i utjecaj pojedine životinje na in vitro probavljivost vlakana i suhe tvari tri različita voluminozna krmiva (slama, djetelina i livadno sijeno) te da li promjene razine škroba u obroku izazivaju promjenu mikrobnog sastava fecesa konja. Rezultati su pokazali povećanu probavljivost vlakana i suhe tvari u sva tri voluminozna krmiva s povećanjem razine škroba u obroku. Paralelno s povećanjem udjela škroba zabilježena je i veća brojnost laktobacila, amilolitičkih i celulolitičkih bakterija u fecesu konja. Iz navedenog se može zaključiti da postepeno povećanje dnevne razine škroba u obroku konja (do 0,9 g/kg tjelesne mase životinje) ima pozitivan utjecaj na probavljivost vlakana i suhe tvari voluminoznih krmiva.

Abstract (english)

Starch is a richer source of energy for horses than the fibers, but its excessive amount in the meal reduces its digestibility in the small intestine, increases fermentation in the caecum and large colon, which may result in reduced fiber fermentation and health problems (e.g. colics). The aim of the study was to determine the effect of different daily starch levels on in vitro digestibility of neutral detergent fibers and dry matter and whether changes in horse feces microbes occur. In the experiment, set as latin square, three horses with an average body mass of 650 kg and similar physical activity (similar training process) were included. Horses were fed with 12 kg of hay distributed in three meals and fodder mixture divided as follows: during first period 0.6 kg/day/horse; during second 1.2 and third 1.8 which contained 0.3, 0.6 and 0.9 g starch/kg of body weight. The main explored influences were the level of starch in the horse meal and effect of individual on in vitro fiber and dry matter digestibility of three different voluminous fodder (straw, clover and meadow hay). The results showed increased digestibility of fibers and dry matter in all three voluminous fodder by increasing the starch level in the meal. Parallel to the increase of starch content, a higher number of lactobacilli, amylolytic and cellulolytic bacteria in the horse feces was recorded. From this research it could be concluded that the gradual increase in the daily level of starch in the horse meal (up to 0.9 g/kg of body weight) has a positive effect on the digestibility of fibers and dry matter of voluminous fodder.

• Keywords: škrob; probavljivost; neutralna detergent vlakna; suha tvar; mikrobiom fecesa
• Keywords (english): starch; digestibility; neutral detergent fiber; dry matter; fecal microbiome
• Language: croatian
• URN:NBN: urn:nbn:hr:204:586820
• Study programme: Title: Animal Nutrition and Feed Science; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka hranidbe životinja i hrane (magistar/ magistra inženjer/inženjerka hranidbe životinja i hrane)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-04-05 13:04:39