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 quality of bulky feeds on the farms of the Vologda Region

The article presents the results of studying the chemical composition and quality of forage harvested on farms of the Vologda Region. As a result of detailed analysis of roughages and succulents nutritive value it has been revealed that regarding metabolizable energy and crude protein they insufficiently meet the needs of highly productive animals. The proportion of the 1st and 2nd class fodders in 2014 was as follows: 14.1% of hay, 38.5% of haylage, 44. 8% of silage.

Methodical approaches to the use of laying hen forced molting

The analysis shows various methods of hen forced molting used in different farms. The methods used nowadays allow increasing the lifetime of laying hens, reducing the duration of molting and identifying stress resistant hens.

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.

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