Биологические и сельскохозяйственные науки

Influence of thinning out and nitrogen fertilizers on photosynthesis and growth of spruce in birch forests of myrtillus type

Submitted by red on Wed, 27/12/2017 - 13:18

The effect of different nitrogen doses and cutting on the rate of physiological and growth processes has been studied in birch forests of blueberry type in taiga zone. It has been established that nitrogen has got little effect on the vitality and growth of spruce in mature birch forests because of the light lack. In thinned stands the nitrogen increases the rate of photosynthesis twofold, activates processes associated with the accumulation and subsequent outflow of carbon metabolites from the needles. The result of this nitrogen action is the intensification of growth processes.

Specific measures to prevent helminthiasis in cattle in the Russian North-West non-black soil zone

Submitted by red on Wed, 27/12/2017 - 13:18

The general measures of specific prevention of pasturable helmints in cattle based on the rich experience of personal experiments taking into account the species composition, ecology, epizootiology, biology of helmints are presented.

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

Submitted by red on Wed, 27/12/2017 - 13:18

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.

Phytophagous in seed crops of galega orientalis in the Vologda region

Submitted by red on Wed, 27/12/2017 - 13:17

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

Submitted by red on Wed, 27/12/2017 - 13:17

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

Submitted by red on Wed, 27/12/2017 - 13:17

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

Submitted by red on Wed, 27/12/2017 - 13:17

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

Submitted by red on Wed, 27/12/2017 - 13:17

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.

Developing fertilizer system for lawn grass stands

Submitted by red on Wed, 27/12/2017 - 13:17

This paper is the result of studying the peculiarities of mineral nutrition of lawn grass stands established on the basis of perennial bottom meadow grasses. In this work the assessment of the main mineral nutrients removal by the top mass of lawn plants during the whole growing season and for each mowing cycle has been given, the doses of mineral fertilizers for each experimental option in active substance and in physical weight have been defined.

The quality of bulky feeds on the farms of the Vologda Region

Submitted by red on Wed, 27/12/2017 - 13:17

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.

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