| Title | Promjene sadržaja produkata fermentacije vodotopivih ugljikohidrata tijekom siliranja različitih hibrida kukuruza |
| Author | Jelena Marot |
| Mentor(s) | Kristina Kljak (thesis advisor)
|
| Abstract | Na hranidbenu vrijednost kukuruzne silaže može utjecati cijeli niz čimbenika od izbora hibrida do upotrebe aditiva. Cilj ovog istraživanja je bio istražiti utjecaj hibrida, dodatka inokulanta i vremena siliranja na sadržaj izabranih vodotopivih spojeva. Za pripremu silaža tri hibrida kukuruza (Bc 418b, Bc 678 i Bc exp6) su zasijana u split plot shemi u pet ponavljanja na istom testnom polju, a za analizu su uzeti uzorci zelene mase za siliranje, te silaže nakon 21. i 60. dana siliranja. Sadržaj istraživanih vodotopivih spojeva određen je u vodenom ekstraktu, pri čemu je korištena antron metoda za određivanje sadržaja vodotopivih ugljikohidrata, a enzimatski kitovi za određivanje sadržaja octene kiseline i etanola. Mliječna kiselina je određena spektrofotometrijski i izražena kroz odnos mliječne i octene kiseline. Hibrid je jedino utjecao (P<0,05) na sadržaj vodotopivih ugljikohidrata dok je kod ostalih parametara zabilježen utjecaj inokulanta i vremena siliranja. Tijekom siliranja opadao je sadržaj vodotopivih ugljikohidrata a rastao sadržaj octene kiseline i etanola te odnosa mliječne i octene kiseline. Sadržaj octene kiseline i etanola značajno ispod gornjih optimalnih granica upuduju na optimalne uvjete tijekom siliranja. |
| Keywords | corn silage hybrid inoculant water-soluble carbohydrates |
| Parallel title (English) | Changes in the contents of carbohydrate fermentation products during ensiling different maize hybrids |
| Committee Members | Kristina Kljak (committee chairperson)
Darko Grbeša (committee member)
Marina Vranić (committee member)
|
| Granter | University of Zagreb
Faculty of Agriculture |
| Lower level organizational units | Department of Animal Nutrition |
| Place | Zagreb |
| State | Croatia |
| Scientific field, discipline, subdiscipline | BIOTECHNICAL SCIENCES
Agronomy
|
| Study programme type | university |
| Study level | graduate |
| Study programme | Animal Nutrition and Feed Science |
| Academic title abbreviation | mag. ing. agr. |
| Genre | master's thesis |
| Language | Croatian |
| Defense date | 2017-07-06 |
| Parallel abstract (English) | There are multiple factors from hybrid selection to inoculant addition influencing nutritional value of maize silage. The aim of this research was to explore effects of hybrid, inoculant addition and ensiling time on contents of selected water-soluble compounds. Maize hybrids (Bc 418b, Bc 678 and Bc exp6) selected for ensiling were plantedin a split plot scheme in five repetitions on the same test field; fresh material for ensiling as well as silage after 21st and 60th day of theensiling processwere sampled for analysis. The content of analysed water-soluble compounds was determined in the water extract; antron method was used to determine the content of water-soluble carbohydrate while enzyme kits were used to determine contents of acetic acid and ethanol. Lactic acid was measured spectrophotometrically and expressed through the ratio of lactic and acetic acid. Hybrid affected (P<0.05)only content of water-soluble carbohydrates while other parameters were affected by inoculant addition and the ensiling time. During ensiling process content of water-soluble carbohydrates decreased, while acetic acid, ethanol and lactic acid/acetic acid were increasing. The content of acetic acid and ethanol significantly under the upper optimal limit suggests optimal conditions during the ensiling process. |
| Parallel keywords (Croatian) | kukuruzna silaža hibrid inokulant vodotopivi ugljikohidrati |
| Resource type | text |
| Access condition | Access restricted to students and staff of home institution |
| Terms of use |  |
| URN:NBN | https://urn.nsk.hr/urn:nbn:hr:204:004181 |
