Three year field trials (1995-1998) were aimed at determination of the inoculation and top-dressing with calcium amonium nitrate (KAN) effect on number and mass of root nodules of winter peas in mixture with "Sana" wheat and also on the green mass and dry matter yield of winter pea and wheat mixture. Immediately before sowing the inoculation of pea seeds was done by the indigenous variety of Rhizobium leguminosarum bv. Viciae which belongs to the collection of Department of Microbiology (Redžepović et al.) at the Agricultural Faculty. In the first investigation period (March 21 st ) inoculated variants (2 i 4) had a significantly higher (P=5%) active nodule number in respect to control and fertilized variant (3). During the second investigation period (May 24 th ) inoculated pea variant (2) had significantly higher (P=5%) active nodule number in respect to root nodule number determined on the fertilized pea variant (3) as well as the highest total nodule number. In the third investigation period (June 1 st ) the highest total pea root nodule number was determined on the inoculated variant 2 (159,42) as well as nodule dry weight (2,80 g/variant). Average mixture green mass yield were ranging from 49,83 t/ha (variant 4) up to 54,22 t/ha (variant 3). Differences between green mass yield were not significant (P=5%). Pea mass content in total green mass yield was 51,50% (variant 4) up to 63,22% (control). Total dry matter yields were ranging from 12,03 t/ha (control) up to 14,85 t/ha for variant 3 (KAN fertilization). Inoculated mass variant (2) had a higher pea mass content in respect to fertilized variants. Digestable pea raw albumen yields in 1998. were ranging from 1147 kg/ha (control) up to 1641 kg/ha for inoculated variant 2, and for wheat, those values were from 426 kg/ha (control) up to 646 kg/ha for inoculated and fertilitzed variant 4. Total PSB mixture yield were from 1573 kg/ha (control) up to 2049 kg/ha for inoculated variant 2. Inoculated variant 2 had a significantly higher (P=5%) SU yield (7,39 t/ha) pea in respect to other variant yields. Total SU yields of inoculated variants (2 and 4) and KAN fertilized (3 and 4) were significantly higher (P=5%) in respect to controls. Inoculated pea variant (2) had 73,01 GJ NEL, significantly higher (P=5%) in respect to other variant yields, as well as mixture of winter peas and wheat 109,37 GJ NEL/ha.

inoculation; winter pea in wheat mixture; yield; fodder value

Published by University of Zagreb, Faculty of Agriculture, Zagreb, CROATIA
Sponsored by Ministry Science and Education of the Republic of Croatia