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Publication type: Baccalaureate Thesis

Year: 2015

Author(s): Däumler, Therese

Title: Beurteilung von hygienischer Qualität, Futterwert und Vorkommen der Herbstzeitlose (Colchicum autumnale) in großen Heulieferungen anhand einzelner Proben.

Other title: Assessment of hygienic and overall food quality and the occurrence of meadow saffron (Colchicum autumnale) in big hay batches by looking at isolated samples

Source: Bakkalaureatsarbeit, Vet. Med. Univ. Wien, pp. 81.


Advisor(s):

Khol Annabella

Reviewer(s):
Zitterl-Eglseer Karin

Vetmed Research Units:
Institute of Animal Nutrition and Functional Plant Compounds


Abstract:
For the present bachelor thesis two hay batches were randomly tested to determine their hygienic quality and the occurrence of meadow saffron. The results were compared with those of Lejeunes (2012). The extent of the contamination of the batches with meadow saffron was analysed and a spot check size was determined, which gives a nearly representative assessment of the occurrence of meadow saffron in one batch. The two batches (10 tonnes each), were sampled by random selection of 40 small hay bales. For the sensory analysis of the 80 samples the evaluation system of the ÖAG was used to calculate feed value and assess the hygienic quality of the hay samples. With the help of an analysis of the stem to leaf ratio the energy content was evaluated. Also the meadow saffron proportion of each hay sample was identified. Through statistical evaluation criteria were defined to support a decision of acceptance or rejection of the hay supply. In the present study quality deficiencies such as the formation of dust and the occurrence of meadow saffron were registered. Most samples were found to be very dusty, being the major complaint concerning hygiene, but also contaminants such as soil, tiny branches and meadow saffron were found. In every second to third sample the toxic plant was found. In one of two batches the concentration of meadow saffron in contaminated samples always was above the set limit of < 0,015 % defined as cutoff for the present study. If meadow saffron is found in one of the first samples drawn, the likelihood to find a higher concentration of meadow saffron in the whole batch increases. Due to the high occurrence of meadow saffron in the examined batches, drawing six samples, for example would have been sufficient to have a high chance (L1: p= 0,972; L2: p= 0,822) of finding a meadow saffron contamination close to the limit. In such a case a refusal of the delivery would be justifiable. The current study proved that meadow saffron poses a problem for hay production for the examined hay producing farm. Producers should implement measures to control meadow saffron and improve production methods. It remains the duty of the Vetmeduni Vienna to thoroughly examine incoming hay batches and to promote the education of the animal care takers. They should be able to recognize the toxic plant and take special care during feeding. If these steps are taken, the likelihood of consuming meadow saffron can be reduced. This will help to ensure that the horses of the Vetmeduni Vienna do not get a staple diet which is injurious to their health.


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