Valentin KOSEV1*, Anna ILIEVA1
1Institute of Forage Crops–Pleven
Gen. Vladimir Vazov 89 Street, 5800 Pleven, BULGARIA
*Corresponding author e–mail firstname.lastname@example.org
Abstract. In 2010–2011 г. the Second Experimental Field of the Institute of Forage Crops–Pleven, was carried out field trial with seven (Mir, Pleven 10, Fenn, Austrian winter pea, E.F.B.33, Uzbetskij 71 and Chlumecka fialova) winter pea (Pisum sativum L.) varieties from the pea collection. Variety Mir 4 was used as a standard. A biochemical assessment of the aboveground biomass of the varieties was made by the following characteristics: content of crude protein, crude fiber, calcium, phosphorus and water soluble sugars. The results of the study showed that, with the highest green mass yield and crude protein in phenological stage–full pod formation stage are varieties Pleven 10, E.F.B.33 and Chlumecka fialova and grain yield and crude protein Fenn and Austrian winter pea. At both phenological stages of the development of the plants Chlumecka fialova was characterized with high content of crude protein and low of crude fiber. The highest content of the water soluble sugars in aboveground biomass was established in variety Uzbetskij 71. At phenological stage the full pod formation were established correlational relationships–positive between crude protein and phosphorus (r = 0.653) and negative between crude protein and crude fiber (r = –0.589), phosphorus and crude fiber (r = –0.585).
Keyword: aboveground biomass, biochemical assessment, winter forage pea