|
Hodnocení ekonomické efektivnosti pěstování smíšených kultur vojtěšky seté a trávy
Richterová, Nikola
The aim of this study was to compare the yields of mixed crops of sown alfalfa and grasses depending on variety, cutting, ratio (alfalfa to grass rows) and year. Small-plot experiments at the Troubsko site, and field experiments at Vatín were evaluated. The quality of forage was also evaluated, namely crude fibre and crude protein content. The yields of the crops decreased with each successive cutting (p<0.05). With regard to green matter yields, the most advantageous is the cultivation of sown alfalfa in a mixed culture with alfalfa sorghum, where the ratio of alfalfa to sorghum rows is 3:1. For dry matter in the same ratio, a combination with festulolium (Hykor) is better. The crude fibre content of the mixed cultures ranged from 20.73% to 27.5% and the crude protein content ranged from 9.82% to 18.32%. It was found that the protein content was directly proportional to the amount of alfalfa in the crop.
|
|
Porovnání systémů hodnocení obsahu hrubého proteinu v krmivech pro skot
Šobáň, Petr
ŠOBÁŇ, P. Comparison of evaluation systems of crude protein content in cattle feed, Bachelor's thesis, Faculty of AgriSciences Mednel University in Brno, 2017, s. 49 This bachelor's thesis deals with different systems of evaluation of crude protein content in cattle feed. Several systems are described in the thesis: Czech and Slovak(PDI), British (ARC1980), Dutch (DVE/OEB2010), German (RDP), French (INRAF), Italian (INRAI), Swiss (APD1984), American (NRC2001) and system of Nordic countries (NKJ1985). First part of this thesis is dealing with protein in ruminant nutrition in general and after that describes individual protein evaluation systems and their feed analyzations. In Europe, most of the systems are based on principle of the French system (INRAF). Therefore, French system (INRAF) and American system (NRC2001) are described with more details. There has been determined great similarity of most of the protein evaluation systems globally and they do not differ significantly. In conclusion, it was stated, that main difference between EU systems and American system is, that in EU systems is evaluated amount and quality of protein in each feed. While in American system is evaluated amount and quality in final feed mixture.
|
|
Stravitelnost živin z praktické krmné dávky pro koně
Pressová, Petra
The aim of the study was to determinate digestibility of nutrients from diets for horses. The experiment was conducted on 9 Czech Warmblood horse breed on University school farm at Žabčice. For selected horses we found weight, age and workload. Horses were divided into 3 groups and in three balance periods were have gradually fed them the same amount of feed mixtures and meadow hay. Altogether an attempt fed 3 compound feed (mixtures), in which we analyzed components that were used in the experiment. Feed mixtures consisting from barley, oats, flaxseed meal, bean, dried whey, soybean meal, mineral premix and meadow hay. Diets mutually differed amounts of soybean meal. The experiment was arranged factor - so that no group of horses did not receive the same mixtures of 2x. The results were found to amount spent nutrients and calculated their digestibility. Digestibility of dry matter was 74.07 %+-4,45, crude fat 30.95 %+-23,62, energy 74.57 %+-3,89, nitrogen-free substances 79.79 %+-4,12, crude ash 66.31 %+-14,89, crude protein 80.17 %+-4,59 and crude fiber 69.91 %+-6,64. Digestibility of calcium, we estimated at 75.08 %+-8,35 and phosphorus 51.65 %+-15,93. Due fed mixture resulting difference in digestibility of crude protein at 1.02 % and the group fed mixtures, soybean meal and the group fed mixtures with the highest content of soybean meal (S10). The digestibility coefficients are most affected by the individual characteristics of horses and will need to make further balance for us to objectively determine the digestibility of crude protein in rations.
|
|
Analýza vybraných potravin metodou NIR
Bočková, Tereza
BOČKOVÁ, T. Analysis of selected foods by NIR, Master thesis, MENDELU in Brno, 2015, 72p. The aim of the thesis was to examine samples of regionally grown cereals, oilseeds and legumes using NIR analyzer DA 7200 and compare the results to the tables and chemical analysis. A total of 26 samples were used. For the whole, crushed and milled grains and seeds, according to the type of the sample, analysis of water, crude protein, crude fiber, crude fat and starch were made. The content of crude protein was verified by the chemical laboratory. NIR measurements showed discrepancies in the case of evaluation of individual substances for the whole, crushed and milled grains or seeds, although the same material was used and the measured values should be similar. We have detected for example crude protein content in Apache (Litava) wheat sample by NIRS analysis 129,3 +- 1,78 g.kg-1 for the whole grains, 116,5 +- 0,72 g.kg-1 for the crushed grains and 100,9 +- 2,71 g.kg-1 for the milled grains. The chemical analysis for the same sample showed the value of 120,8 g.kg-1. According to the literature, the crude protein content in wheat should be between 118 and 132,1 g.kg-1. When evaluating the characteristics of the whole, crushed and milled samples crude protein content reached 135,6 +- 8,78 g.kg-1 for the whole, 132,3 +- 9,97 g.kg-1 for the crushed and 130,5 +- 11,55 g.kg-1 for the milled samples. Given that the crude protein measurement results were in accordance with the chemical analyses and the tabular values, it is apparent that the NIR analyzer is working properly. The results of this thesis, however, bring the presumption that the device setting is now not suitable for multiple analyses of different materials.
|