14
MAY
2014

Determining chlorophyll and carrotenoid content in Bombyx mori L. excreta by Near Infrared Spectroscopy

S. Atanasova, M. Panayotov, D. Pavlov, M. Duleva Abstract. For the needs of the experiment excreta age five of silkworms (populations of the monovoltine crossbreds of Bombyx mori L. Super1хХеса2, 19х1014 and 1013х1014) raised in spring have been used. Spectral measurement (NIR spectro
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14
MAY
2014

Influence of the amount of milk clotting enzyme with microbial and camel origin on the coagulation time of cow’s milk

P. Panayotov, K. Yoanidu, P. Boyanova, B. Milenkov Abstract. A study of rennet coagulation of cow’s milk was conducted using chymosin of microbial and camel origin in the range 10 to 60 cm3.10-2 dm-3 with an equivalent activity to 1:50000. As a control calf chymosin was used. Th
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14
MAY
2014

Effect of supplementary honey and artificial sugar feeding of bees on the composition of royal jelly

R. Balkanska, I. Zhelyazkova, M. Ignatova, B. Kashamov Abstract. The purpose of this study was to assess the effect of supplementary honey and artificial sugar feeding of bees on the composition of royal jelly. A total of 29 royal jelly samples were harvested and analyzed from May to
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14
MAY
2014

Fatty acids and lipid indices of buffalo milk yogurt

N. Naydenova, T. Iliev, G. Mihaylova Abstract. The present investigation had the objective to study the changes in the atherogenic index and the lipid preventive score as nutrition indicators for assessment of the risk of cardio-vascular diseases. The study was performed with buffalo
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14
MAY
2014

Carcass composition and meat quality in lambs reared indoors and on pasture

T. Popova, P. Marinova Abstract. An experiment was carried out with 28 male lambs of Northeastern Bulgarian Fine Wool Breed (NBFWB) and lamb crosses of this breed with Ile de France (NBFWB x IDF) reared indoors and on pasture in the Institute of Animal Science – Kostinbrod. Carcass co
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14
MAY
2014

Changes of some agro-chemical parameters of Pellic Vertisol (FAO) soil type in growing cereal crops under organic system of agriculture

V. Koteva Abstract. The investigation was carried out in a field certified for organic agriculture, on soil type Pellic vertisol (FAO) during 2004 – 2012. The changes in soil acidity, total humus content and reserves of mineral nitrogen, mobile phosphorus and available potassium in so
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14
MAY
2014

Biological activity of plant protection products against Tuta absoluta (Meyrick) in tomato grown in greenhouses

N. Valchev, V. Yankova, D. Markova Abstract. Tomato leaf miner Tuta absoluta (Meyrick) (Lepidoptera:Gelechiidae) is a dangerous pest in tomato grown in greenhouses. The control of this pest is difficult because of the latent way of life of the larvae in the mines, high reproductive po
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14
MAY
2014

Stability evaluation of mixtures among preparations with different biological effect on the basis of grain yield in spring vetch

G. Delchev, N. Georgieva, I. Nikolova Abstract. With the purpose to study the stability of mixtures among preparations with different biological effect on the basis the grain yield in spring vetch a three-factor field trial was carried out during the period 2007-2009 in Institute of F
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14
MAY
2014

Productivity of irrigation cotton cultivated under different inter-row spaces

I. Saldzhiev, A. Muhova Abstract. Field trial on cotton (Vega cultivar) was carried out during 2007–2011 on leached vertisols under irrigation regime of sprinkling – 75 % of the field moisture capacity (FMC) for the soil layer of 0 – 40 cm. The trial included the following variants: f
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14
MAY
2014

Investigations on friction coefficients of cow hooves with different dairy farm floor types

T. Penev, Z. Manolov, I. Borissov, V. Dimova, Tch. Miteva, Y. Mitev, V. Kirov Abstract. The investigation was performed in three Bulgarian free-stall cattle farms with different flooring types. The floor of farm A was covered with two rubber mat types, with and without abrasion lining
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