Effect of inoculation and nitrogen top-dressing on yield and fodder value of winter pea in triticale mixture

Two year field trials (1999-2001) were carried out to determin the effect of seed winter pea inoculation and nitrogen top-dressing on a number and activity of pea root nodules and also on the green mass and dry matter yield of winter pea cv. Maksimirski ozimi and triticale cv. Clercal mixture. Wright before sowing the inoculation of pea seeds was performed by the indigenous variety of Rhizobium leguminosarum bv. viciae which is part of microbial collection of the Department of Microbiology at the Faculty of Agriculture University of Zagreb. The highest total nodule number on pea root (141) was determined on the inoculated variant as well as active nodule (133). Average mixture green mass yield were ranging from 48,2 t ha-1 (control) up to 52,1 t ha-1 (nitrogen top-dressing). Total dry matter yields were ranging from 11,6 t ha-1 (control) up to 13,3 t ha-1 (nitrogen top-dressing). Pea crude proteins yields in 2001 were ranging from 196 kg ha-1 (control) up to 333 kg ha-1 (nitrogen top-dressing) and for triticale, those values were from 1 562 kg ha-1 (control) up to 2 105 kg ha-1 (nitrogen top-dressing). Total crude proteins mixture yield were from 1 758 kg ha-1 (control) up to 2 438 kg ha-1 (nitrogen top-dressing).