Comparative study of some biochemical indicators in Karakachan and Copper-Red Shumen sheep breeds

G. Angelov, I.Dimitrova, T. Mehmedov, P. Stamberov, N. Stancheva, S. Georgieva, Zh. Nakev
Abstract. The survey covers 140 clinically healthy sheep from two indigenous sheep breeds – Karakachan (KK)and Copper-Red Shumen (CRS) over one year old. Blood samples are taken from v. jugularis, and using a semi-automatic biochemical analyzer were determined in serum levels of blood sugar, total serum protein and albumin, creatinine, urea, calcium, inorganic phosphorus and magnesium. The results obtained indicated that the levels of total protein (75.81±7.03 for KK and 72.19±5.64 for CRS), albumin (44.85±6.43 for KK and 42.09±4.06 for CRS), creatinine (183.35±291.77 for KK and 128.30±45.70 for CRS) and urea (9.30±3.90 for KK and 11.10±5.76 for CRS) in Karakachan breed are poorly higher than those of the Copper – Red Shumen. The values of blood sugar (2.89±0.49 for KK and 2.49±0.57 for CRS), calcium (2.30±0.41 for KK and 2.22±0.33 for CRS), inorganic phosphorus (1.94±0.64 for KK and 1.94±0.44 for CRS) and magnesium (1.23±0.29 for KK and 1.14±0.20 for CRS) showed no breed differences. The significant differences between the two breeds were obtained only in value of both creatinine and blood sugar.


Response of vine rootstocks to the content of Ca and Mg in nutrient solutions

V. Valcheva, K. Trendafilov

Abstract. We examined the reaction of vine rootstocks based on hybrids of Vitis riparia, Vitis rupestris and Vitis berlandieri, to deficiency and excess of Ca and Mg in nutrient solutions in hydroponics cultivation in order to investigate their resistance to different levels of the two elements in calcareous and acid soils. It was found that the investigated rootstocks respond to imbalance of Ca and Mg. The reaction occurs on the biometric characteristics of plants – height, weight, dry matter content and on the composition – content of Ca, Mg, Fe and Mn in plants. We tested hybridized rootstocks SO4 (Berlandieri X Riparia selection Oppenheim 4), Fercal, (Riparia X Rupestris) Couderc 3.309 and Gravesac, which are widely used in practice. Relatively less development and lower sensitivity to the studied conditions was established for rootstocks Couderc 3,309 and Gravesac. They also react with slight change of their chemical composition under conditions of deficiency and excess of Ca and Mg. It was established that, high levels of calcium in plant biomass inhibit absorption of magnesium, and the dependence is particularly pronounced for rootstock Fercal. For rootstocks SO4 and Fercal well expressed influence of medium unbalanced with calcium on the content of iron and manganese in plants was observed.