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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BIOCHEMICAL TRAITS AND CORRELATION ASSOCIATIONS BETWEEN CHEMICAL COMPOSITION AND SOME PARAMETERS YIELD IN BIRDSFOOT TREFOIL

Boryana  Georgieva CHURKOVA

Abstract:The field trial was conducted during the period 2002–2005 in the Experimental field of the IMSA Troyan for determination of the biochemical traits and correlation associations between chemical composition and some parameters yield in birdsfoot trefoil. There were included for study varieties Targovishte 1–St (Bulgaria) and 4 specimens of birdsfoot trefoil: local population (Hungary). K–30 (Serbia), Pulavskii (Poland) and Viking (USA). The studied accessions birdsfoot trefoil differed in chemical composition. The variety Viking (19.07%) was characterized with highest content of crude protein and lowest values of crude fibber (27.75%). Was positive correlation between the height of stems (r = 0.6229) and dry mass yield (r= 0.5271) and weak strength of correlation between the content of crude protein and the height stems (r = 0.4238). The registered quality traits a forage of birdsfoot trefoil formed under conditions of set on light grey pseudo podzolic are interest in the breeding.

Key words: birdsfoot trefoil, varieties, populations, chemical composition, correlation associations

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CHARACTERISTICS OF VARIETIES AND POPULATIONS BIRDSFOOT TREFOIL FOR SEED YIELD UNDER THE SOIL AND WEATHER GROWING CONDITIONS OF THE TROYAN REGION

Boriana CHURKOVA, Vladimir LINGORSKI

Abstract: During the period 2008–2010 in the experimental field of RIMSA Troyan on light gray pseudo podzolic soil were tested in the following varieties and populations birdsfoot trefoil; 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). The results from seed yield showed wide ranges of variation for the different years and on mean for the period: The tested varieties and populations were with high productive potential for the seeds yield. The differences in Number of pods/raceme, Number of racemes / plant, Number of seeds / pod, 1000–seed weight and conditioned also different values of formed seed yield of the tested varieties and populations. The seed yield average for the period of study in all tested cultivars and populations were superior the standard variety Targovishte 1.The highest seed yield was obtained from the Dedinovskii variety–0.260 t/ha, followed by Zora and Bokor–0.255 t/ha for a three year period. The higher seed yield of the tested birdsfoot trefoil varieties compared with the standard is due to the formation of the larger Number of pods/raceme, Number of racemes/plant, Number of seeds/ pod and 1000–seed weight. The correlation between seed yield and 1000–seed weight was very strong correlation (r=0.861786).

Key words: birdsfoot trefoil, varieties, populations, seed yield, structural elements, correlation associations

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