Uporaba pufrov v prehrani krav molznic

diplomsko delo

Vid Camloh (Author), Tatjana Pirman (Reviewer), Andrej Lavrenčič (Mentor)

Abstract

Pred telitvijo krmimo krave z obroki, ki vsebujejo veliko vlaknine. Po telitvi pa se njihove potrebe hitro povečujejo in krma vsebuje čedalje več lahko prebavljivih ogljikovih hidratov, s čimer pokrivamo njihove velike potrebe po energiji. To pa v predželodcih povzroči zmanjšanje pH, saj sladkorji prehitro v preveliki količini fermentirajo v hlapne maščobne kisline. Nizek pH je neugoden, saj se prebava ostalih snovi upočasni. V mleku to vodi v zmanjšanje mlečne maščobe. Zato v krmo dodajamo pufre, ki nevtralizirajo vsebino predželodcev in s tem preprečijo zmanjšanje vsebnosti mlečne maščobe v mleku. Najbolj razširjen pufer je soda bikarbona. Je učinkovita pri nevtralizaciji vsebine predželodcev in deluje zelo hitro. Magnezijev oksid je močnejši pufer od sode, in ga običajno dodajamo v kombinaciji z njo za boljši učinek. Ena od možnosti je tudi uporaba morskih alg, ki jih pridobivajo na obalah Irskega morja in imajo ugodnejši učinek na vampov pH kot soda, njihovo delovanje pa je tudi daljše. pHiX-up je močan pufer ki ima 3× močnejši vpliv na vampov pH kot soda, vendar pa deluje zelo hitro in kratkotrajno. V obrok lahko dodajamo tudi gline ali kvasovke, ki imajo pozitivne učinke na vampov pH.

Keywords

govedo;krave molznice;prehrana živali;krmni dodatki;pufri;diplomske naloge;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[V. Camloh]
UDC:	636.2.084/.087(043.2)
COBISS:	77769475
Views:	212
Downloads:	20
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Use of buffer in dairy cow nutrition
Secondary abstract:	Before calving, cows are fed diets high in fiber. After calving, their requirements increase rapidly and their diet contains an increased amount of easily fermentable carbohydrates. This leads to a drop in rumen pH as sugars are fermented very rapidly and extensively to short-chain fatty acids. A low pH is suboptimal and digestion of other nutrients is slowed. This leads to a decrease in milk fat. To neutralize the pH in the rumen and prevent milk fat drop, buffers are added to the feed. The most commonly used buffer is sodium bicarbonate. It is effective in neutralizing rumen acids, but its effect is not long lasting. Magnesium oxide is a more powerful buffer and is usually added in combination with sodium bicarbonate for better effect. Seaweed, produced on the shores of the Irish Sea, is also an alternative. They have a stronger effect on pH than sodium bicarbonate and their effect lasts longer. pHiX-up is a strong buffer that is 3× stronger than sodium bicarbonate, but its effect is short-lived. Other buffers that can be used are also clays or yeasts, which also increase the low pH in the rumen.
Secondary keywords:	cattle;dairy cows;animal nutrition;feed additives;buffers;
Type (COBISS):	Diploma project paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za zootehniko
Pages:	VI, 18 str.
ID:	13534376