|
|
Savci jako škůdci na ovocných dřevinách a v sadech
Benešová, Kateřina
The bachelor thesis deals with the negative impact of wild mammals on fruit trees and orchards. The main aim is to find out which mammal species are harmful to fruit trees and what types of damage they cause. Based on the literature, it is then possible to derive solutions to effectively protect against this damage. In addition, a questionnaire survey can also be used to address the problem. Damage to fruit trees is most common from rodents (Rodentia), even-toed ungulates (Artiodactyla) and hares (Lagomorpha). Several important factors influence the impact of these mammals on fruit trees. Rodents cause the most damage at times of peak abundance, so regular monitoring is needed. Currently, there is a growing interest in biological control of mammals, where no chemical products are used. However, due to its immediate result and ease of application, chemical control still prevails.
|
|
|
Vliv supranutričních dávek organické formy selenu na vybrané krevní parametry králíků
MIRANDOVÁ, Marie
Selenium is an important essential mikroelement, that acts through a number of selenoproteins. Both it´s lack, and it´s plenty has a negative influence on the organism. Recently is used Se during the various diseases treatment of people with supranutritive dosages of this element. The presented thesis deals with the supranutritive dosages influence of Selenium concentration organic form (Chlorella, enlarged alga with selenium) in blood serum and selected rabbits blood parameters (hemoglobin and hematocrit level, leukocytes and erythrocytes, urea concentration, triglycerides, gamma value glutamyltransfers and total concentration of plasmatical proteins). Nine week experiment was performed on 18 rabbits, which were divided in to three experimental groups. Group 1 (control group) has received the selenium at a dosage of 0.15 mg / kg dry matter of feed, group 2 at a dosage of 0.3 mg / kg dry matter feed and group 3 at a dosage of 4.3 mg / kg of dry matter feed. During the experiment weren´t registered any clinical symptoms associated with the possible Se toxicity. Supranutritive dosages in the group 3 led to faster and statistically significant increase of the selenium concentration in the blood serum. Parameters of the hemopoiesis, the growth and the substantial metabolism had no influnece with supranutritive dosages in the groups 2 and 3. The results has not confirmed the clear positive or negative effect of selenium supranutritive dosages on selected blood parameters. The results show, that after rabbits supplementation are suitable recommended dosages of 0.15 mg Se / kg dry matter feed.
|
|
| |
guest ::
