BIOMETRIC PERFORMANCE AND PRODUCTIVITY OF VARIETIES AND LOCAL POPULATIONS BIRDSFOOT TREFOIL UNDER THE SOIL AND CLIMATIC CONDITIONS OF TROYAN

Boryana CHURKOVA

Abstract. For determination of the plant height, number of main stems and productivity of varieties and populations birdsfoot trefoil a field experiment was carried out during 2008-2010 period in RIMSA – Troyan. Objects of study were the populations originating from: Shumen, Nesebar, Kiten, Tryavna, Sadovo, as well as genotypes of the varieties: V. Podolyanskii (Russia), Dedinovskii (Russia), Martanskii (Russia), Zora (Serbia), Bokor (Serbia), Smolenskii (Russia). Variety Targovishte 1 (St) was used for comparison. The aim of this study is was to investigate the biometric and quantitative indicators of birdsfoot trefoil varieties and populations under agro-ecological conditions of Troyan. The highest forage productivity was obtained in variety Dedinovskii, under the soil and climatic conditions of Troyan. The variety was characterized by high stems and the highest number of main stems. The populations originating Nesebar and Kiten also realize high productivity. The lowest productive was obtained in the variety Zora, due to its poor adaptability to specific soil conditions and lower its productive potential. The third year of the experimental period was characterized by rather high productivity of all studied accessions. The average height of all varieties and populations was 25.4 cm, with minimum and maximum 22.5 cm 29.2 cm. According to the variation coefficient values of the indicator stem height (CV=6.73%) was set very low variability. Average for the period of the investigation the values for the number of main stems varied from 23.7 to 44.0 and their maximum was observed in a variety Dedinovskii (44.0), Martanskii (37.7) and population Nesebar (37.0). The higher density of these accessions and explains their higher productivity.

Key words: birdsfoot trefoil, varieties and populations, plant height, number of main stems, productivity

CORRELATIONS AND DEGREE OF VARIATION BETWEEN YIELD AND SOME INDICATORS OF GROWTH AND CHEMICAL COMPOSITION OF THE GRASS FR THE BIRDSFOOT TREFOIL AND ITS MIXTURES WITH MEADOW GRASS SPECIES

 Boriana CHOURKOVA 

Abstract. From 2002 to 2005, the behaviour of local population of birdsfoot trefoil in binary mixtures with meadow grass species was conducted in the experimental field of RIMSA–Troyan. The variants of the experiment include testing of birdsfoot trefoil–variety Turgovishte 1 (referenceSt), cultivated its own and local population of birdsfoot trefoil in binary mixtures with tall fescue (Albena); perennial ryegrass (Pleven population); bromegrass (Nika); smooth–stalked meadow grass (Troyan population); orchard grass (Dabrava); red fescue (Troyan population); wheatgrass (Ruff). The height of plants shall be amended under the influence of weather conditions, the rate of growth and development of grasses interrelation and competitiveness of the components in grass composition indicative of received Variation coefficients.The production of birdsfoot trefoil and grass types varied with regard to treatments and years. The variation coefficients indicating yields stabilityshowed that it was best expressed in the mixture of birdsfoot trefoil and tall fescue (CV=45.42%) andorchagrdgrass(CV=48.65%).The values of crude protein in all variants were negative correlation coefficient. The correlationcoefficient of the compound with crude fiber content was very positive and strong correlations.

 Key words: birdsfoot trefoil, mixtures, productivity, chemical composition, correlation analysis, height

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