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Výskyt kvasinek v silážích a jejich význam
Vaculíková, Barbora
The aim of the study was to assess the effect of yeast in silage and verify the fact that the additives will ensure inhibition of undesirable microorganisms. The literature review focused on the metabolism of yeast, their importance in silages limitations and possibilities. Model experiments were performed with peas with barley silage and with corn silage. The influence of additives on the final quality of the silage and their influence on the content of microorganisms, together with the quality of the fermentation process, was assessed. According to the provided measurements it can be argued that the use of additives was only partly due to the limitations of yeast and aerobic stability. Chemical preservatives based on organic acids favorably slowed the onset of secondary fermentation in peas with barley silage, even though there was no suppression of the number of yeast on this option. The negative correlation of yeast dry matter content was confirmed for the corn silage (r= 0.6219). In the silage with a chemical preservative (2,402 +- 0,775 log CFU/g) positive effect (P<0,05) on the limitation of yeast compared was detected to the control silage. Based on measurements of pH the degree of contamination of yeast cannot be evaluated. It was confirmed that even the best additive cannot guarantee quality and stable silage, if the principles of silage are not adhered to.
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Vliv obsahu sušiny a kvality fermentačního procesu na aerobní stabilitu kukuřičné siláže
Sadílek, Roman
The content of this thesis is, as the name suggests, the influence of the dry matter content and quality of the fermentation process on the aerobic stability of corn silage. Corn as a plant is used for silage to have fodder and for ensuring the operation of biogas plants. Currently it is one of the most commonly grown forage. In this paper I present both botanical classification and method of cultivation, agrotechnical period, soil preparation, pest management, fertilization and other features and things important to the production of a sufficient quality material for silage. The next part deals with the way of harvesting, the course of stacking and ensiling process itself. In my work, I evaluated the impact of dry matter of corn silage and fermentation quality on aerobic stability of corn silage. I recorded the evaluation results in tables and graphs.
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Silážování travních a jetelotravních porostů
Neuman, Aleš
This thesis describes several representatives of the most common types of Czech legumes and grasses, their ecological requirements and factors that affecting their cultivation. It assesses their benefits and suitability as individual components of clover-grass communities. It compares the cultivation methods and effectiveness for individual grass and clover-grass blends. It characterizes their feed value, assesses the factors affecting the quality of the resulting forages as well as the factors affecting the suitability of these forages for preservation as silage. The importance of conservation is to preserve quality feed throughout the year. Conservation provides stable ration for production dairy cow in all seasons. Ensiling affects the final quality and nutritional value of feed, which is also highly dependent on the proper technological process. Silage additives has its undeniable contribution to the quality of the resulting feed, especially in the production of protein and half-protein wilted forage silage.
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Porovnání výnosových a kvalitativních parametrů vybraných hybridů silážní kukuřice
Seryn, Jaroslav
This thesis presents a comparison of quality and yield parameters of corn silage hybrids. The basis for the work was a pilot experiment, which was set in 2013 on the land of the agriculture company ÚSOVSKO. During the growing period differences among hybrids were recorded at different growth stages. At harvest, yield of biomass was assessed and then the samples were taken for laboratory analyses. The following characteristics of particular hybrids were evaluated: dry matter content, starch content, the content of N-substances, content of ADF and NDF, cellulose content, ash and fat content. Based on obtained data the methane production and milk production from one ton of silage and per one hectare of crop was calculated as well as estimation of digestibility.
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Ekonomika výroby kukuřičných siláží
Bártů, Ondřej
This thesis deals with the corn silage and factors that may affect the economics of their production. The thesis first described agro-technical requirements of maize for the production of high quality silage. It is possible to learn from the thesis on the proper ensiling process and the factors that affect it. Mention is about influence of diseases and pests that can cause significant loss of quality and yield, and thus have a negative impact on the economy of the enterprise. Conversely, a positive effect on the economy have silage additives, which improve the course of the fermentation process. Part of the thesis is devoted to the assessment of the production of corn silage in a particular company, there are compared the procedures applicable in that undertaking with procedures recommended by scientific experts.
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Vliv vybraných faktorů ovlivňujících fermentační proces a využití živin kukuřičné siláže v bachoru
Poštulka, Roman
Corn silage quality is determined by fermentation process quality and nutrient utilization (i.e. starch and fiber). The goal of this trial was to observe the effect of plant protection (against European corn borer), used hybrid and silage additive on the fermentation process quality and ruminal degradability of starch and neutral detergent fiber. The trial was realized on three localities. For the rate of degradability assessment we used the method in sacco. We found high significant differences in the particular and total acid content. On the first locality, the silages from protected plants contained more acids (9,89 g/kg dry matter = DM) than control (7,72 g/kg DM). On other localities was the situation opposite. The lowest content of silage acids and titrable acidity values was measured in the chemical treated silages. These silages had a highest content of ethanol (3,47; 2,83; 4,38 g/kg DM). We confirmed the effect of plant protection on ruminal starch degradability on the first locality. The plant protection led to the decreasing of the starch degradability (45,97 resp. 48,02 %). The NDF degradability did not affect by any experimental factor.
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Different ways of using corn for forage purposes
SLANEC, Roman
Main focus of this thesis was to evaluate various ways of using corn as a provender and briefly mention economic and ecologic value of corn cultivation. According to the aquired data we can say that corn cultivation for provender has a growing tendency in the Czech Republic. Majority of corn is used in the form of silage. It is important to pay attention to agrotechnics, hybrid selection, cultivation and harvest in order to produce silage of high quality. Storage bags has shown better result both economically and in quality compared to silage reservoirs.
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Growing corn for biogas production
POSLUŠNÝ, Marek
In my bachelor's thesis I deal with a corn growing and it's irreplaceable role in a biogas production in BPS according to a suitable hybrid for given manufacturing conditions. The alternative use of corn as an energy plant shows one of the ways which are followed by some agricultural companies. With regard to use of current technologies for a corn silage production, and a possibility to use a biogas waste product as an adequate fertilizer and mainly the biogas production helps to stabilize the companies financially.
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Disorders of energetic metabolism of the horned cattle
HORČIČKOVÁ, Michaela
The work was concentrated on the value of an impact for metabolism of two types of nutritive ration with milch cows of Holstein breed in the period of making cow milk on the top of lactation. The nutritive ration based on the grass haylage was compared to the nutritive mixed ration based on the grass haylage and maize silage. The successive energetic parameters glycaemia, cholesterol, triacylglycerols, urae and totally albumens were evaluated in the practised metabolic profile tests. Complementary parameters were enzyme gamma-glutamyl, ketone bodies substances and acid-basic secretion of urine. The work evidenced that the nutritive ration based on the grass haylage did not fill up the determinated requirements from the point of the dry substance and nett energy of lactation. The mentioned lack reflected the reduced content triacylglycerols especially in the rising phase of lactation. The energetic deficit in that period was not such that a reduction of the condition of the milch cows would occure frequently and the creation of ketone bodies substances. The nutritive ration based on the grass haylage is possible to use like an alternative nourishment of high productive milch cows in marginal situations and only for limited time.
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