Vpliv priprave krmnega obroka v mešalni prikolici na homogenost in prebiranje pri kravah molznicah

Erker, Urška

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Title:	Vpliv priprave krmnega obroka v mešalni prikolici na homogenost in prebiranje pri kravah molznicah
Authors:	ID Erker, Urška (Author) ID Brus, Maksimiljan (Mentor) More about this mentor...
Files:	UN_Erker_Urska_2020.pdf (2,21 MB) MD5: B84E6CF22DC6716A5010E14E6A986B80 PID: 20.500.12556/dkum/cae38209-258b-4f76-8d78-2ffe56898f18
Language:	Slovenian
Work type:	Bachelor thesis/paper
Typology:	2.11 - Undergraduate Thesis
Organization:	FKBV - Faculty of Agriculture and Life Sciences
Abstract:	Na kmetiji Erker smo izvedli poizkus, pri katerem smo dodajali krmnemu obroku vodo in spremljali čas mešanja. Zanimalo nas je, kako sprememba sušine obroka in čas mešanja vplivata na homogenost in porazdelitev delcev krme. Prehranski poizkus smo razdelili na tri dele. V prvem delu poizkusa smo vzorčili standardni krmni obrok s sušino 42 % in ga mešali 10 minut. V drugem delu smo standardnemu krmnemu obroku s sušino 38 % dodali vodo in mešali 15 minut. Zadnji del je temeljil na vzorčenju krme standardnega obroka s sušino 42 %, ter čas mešanja podaljšali iz 10 na 15 minut. Porazdelitev delcev sveže krme smo določili s siti Penn State Particle Separator (PSPS). Prebiranje smo preverili s siti PSPS 12 ur in 24 ur po sveže pokladanem krmnem obroku. Sušino obroka smo spremljali vsak dan poizkusa v času pokladanja krme, določili smo jo s pomočjo friteze na topel zrak. Statistično obdelavo podatkov smo izvedli s statističnim paketom SPSS 25.1 za Windows. Za primerjavo ostankov na posameznem mestu znotraj obrokov smo uporabili GLM analizo in Tukey test. Za primerjavo prebiranja obroka po 12 in 24 urah ločeno v primerjavi s pokladanim smo uporabili t- test. Rezultati statistične analize obroka (38 % SS in 15 min) kažejo, da se četrto mesto na situ 4 značilno (p < 0,05) razlikuje od ostalih mest in lahko trdimo, da ima dodajanje vode pomemben vpliv na homogenost obroka. Rezultati kažejo, da je ob dodatku vode zmanjšana povprečna konzumacija SS/kravo/dan za 0,9 kg oziroma poveča ostanek krme za 2,06 %.
Keywords:	krmni obrok, dodatek vode, čas mešanja, homogenost, prebiranje
Place of publishing:	Maribor
Year of publishing:	2020
PID:	20.500.12556/DKUM-77838
NUK URN:	URN:SI:UM:DK:NHDUGDI5
Publication date in DKUM:	06.10.2020
Views:	1363
Downloads:	194
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Categories:	FKBV
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Licences

License:	CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Link:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:	The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:	16.09.2020

Secondary language

Language:	English
Title:	Effect of feeding wagon feed preparation on the homogeneity and feed screening in dairy cows
Abstract:	At the Erker farm, an experiment was performed in which water was added to the feed ration and the mixing time was monitored. The focus was on how the change in meal dryness and mixing time affected the homogeneity and distribution of feed particles. The dietary experiment was divided into three parts. In the first part of the experiment, we sampled a standard feed ration with a dryness of 42% and mixed it for 10 minutes. In the second part, water was added to the standard feed ration with a dryness of 38% and stirred for 15 minutes. The last part was based on sampling the feed of a standard meal with a dryness of 42%, and the mixing time was extended from 10 to 15 minutes. The particle distribution of fresh feed was determined with a Penn State Particle Separator (PSPS). Reading was checked with PSPS sieves 12 hours and 24 hours after a freshly stacked feed ration. The dryness of the meal was monitored every day of the experiment during the feeding of the feed, it was determined using a fryer in warm air. Statistical data processing was performed with the statistical package SPSS 25.1 for Windows. GLM analysis and Tukey test were used to compare residues at each site within meals. We used the t-test to compare meal reading after 12 and 24 hours separately compared to the meal. The results of statistical analysis of the meal (38 % DM and 15 min) show that the fourth place on sieve 4 differs significantly (p <0.05) from other places and we can say that the addition of water has a significant impact on the homogeneity of the meal. The results show that the addition of water reduces the average consumption of DM/cow/day by 0.9 kg or increases the feed residue by 2.06%.
Keywords:	feed ration, water addition, mixing time, homogeneity, screening

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