Биологические и сельскохозяйственные науки

Studying the age dynamics of cryptosporidiosis in piglets on the farms of the Vologda Region

In this paper the results of studying the age dynamics of cryptosporidia oocysts invasion in piglets have been presented, the dependence of this invasion on the age of animals has been established.

Formation of steadily productive annual mixed sowings based on optimization of mineral nutrition

Complex researches have been conducted in the Tver region on sod medium podzolic sandy loam well-cultivated soil. We have studied implementation of crop yield programmable levels by means of vetch-barley-oats mixtures different in composition. The advantage of their cultivation on grain-and-hay has been revealed, when the program both at the background of 2.5 thous. feed unit /ha and 5.0 thous. feed unit /ha on all variants of mixed crops was exceeded. Program has been carried out only at the programming level on 2.5 thous. feed unit / ha when growing mixtures for grain.

Phytosanitary state of blue lupine crops under conditions of Pskov Region

The phytosanitary assessment of blue lupine crops under conditions of the North-Western zone of the Russian Federation has been done. Harmful objects in lupine agrocenosis have been identified, control measures have been suggested.

The causes of the disposal of the animals and the main milk productivity indices of cows having different genotypes depending on the method of housing and technology of milking

The causes of the disposal of the animals and the main milk productivity indices of cows having different genotypes depending on the method of housing and technology of milking have been analyzed. For all the evaluated periods the animals which were milked with a robotic system in the free stall barn surpassed the cows which were kept on a leash and milked into the pipeline with the help of milking machines. Along with this, in the cows kept in the free stall barn the limb diseases caused culling more often than in other groups of animals under study.

Comparative characteristic of methods for the preparation of muscle cuts for compressor trichinoscopy

The article consideres the methods for the preparation of the tests for the compression trichinoscopy. It gives the results of the determination of the most effective methods to prepare the muscle cuts for the compression trichinoscopy diagnosis.

Phytophagous in seed crops of galega orientalis in the Vologda region

Main phytophagous species belonged to the families of Coleoptera, Heteroptera, Homoptera, Lepidoptera are determined on seed crops of Galega orientalis on the sod-alsopozoriti soil. Longstanding research has established the influence of weather on the population dynamics of the pest and high efficiency of decis and bitoxybacillin of 85.5-95.5 %.

Tendencies of dairy cattle breeding development in vologda region and north-west federal district

The article presents monitoring of the number of farms, livestock and productivity indices of dairy cattle in the Vologda region and in the North-West Federal District within the period of five years.

Ecological-Faunistic review of Gastropoda (Cuvier, 1795) representatives under the Vologda region conditions

Data on species composition of fresh-water mollusks, representatives of Gastropoda (Cuvier, 1795) under the conditions of the Vologda region are provided. 27 types relating to 10 childbirth: Aplexa (Fleming, 1820), Physa (Draparnaud, 1801), Lymnaea (Lamarck, 1799), Anisus (Studer, 1820), Armiger (Hartmann, 1840), Planorbis (Geoffroy, 1767), Segmentina (Fleming, 1818), Bithynia (Leach, 1818), Valvata (O.F.Müller, 1774), Viviparus (Montfort, 1810) are determined. Dominating look is Lymnaea truncatula, Müller, 1774. The main groups of biotopes are defined.

Ethological individuality as a sign of ayrshire cattle breeding

Studies having been carried out on animals of Ayrshire breed show that indexes of food, motion and total activity selection can be successfully used as selection signs. Selection of cows on ethological individuality is accompanied by an increase of their milk production. Animals with increased food activity, compared to cows with a low one, have got the rise of milk yield per lactation by 686 kg. Ultra-active cows should be mentioned particularly, productivity of them opposite to infrapassive ones increases by 49%.

Chlorella suspension use in feeding yield heifers of blackand white breed in milk period growth

The article gives the results of studying on chlorella suspension influence on the yield heifers of black-and white breed. It has been established that feeding crop additions to animals in milk period growth of 0,5kg per head during twenty-four hours brings an increase in average daily gain, feeding activity of heifers along with health conditions optimization.

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