Ecological assessment of use of chitosan succinate for cows in the Southern Urals
Ensuring people's access to safe, high-quality food products is one of main tasks of agriculture. The development of heavy mining, the construction of large power units, etc. increases harmful effects of human activities on nature, including the ecology of the environment. Development of methods reducing the impact of harmful factors on environment including the health of productive animals is important. The aim of this work was to conduct an environmental assessment of application of chitosan succinate and calculate the efficiency of its use when administered to the diet of dairy cows. As a result of researches it was established that in soils used to obtain feed, the content of iron and zinc increased. It is made up of iron (by 12 %) and zinc (of 81.8 %). In corn silage, green feed and concentrates excessive concentrations of iron content of 2.98; of 2.37 and 1.35 times were observed. High content of chromium was registered in all feed and there were arsenic and cadmium (except alfalfa hay with arsenic). Cows treated with chitosan succinate had the aforementioned metals in the blood levels reduced up to the normal one and not exceeding the MPL. In the first experimental group - gradual decline was registered, and the second experienced - it was drastic, immediately after the first administration of the drug, i.e. on the fifth day studies. There was a decrease of heavy metals content in the milk. From the cows of the 2nd test group, by 1050 kg of milk more were received with a higher fat content (by 0.10 %), which made it possible to obtain a milk yield of a basic fat content of more than 1416 kg.