Original scientific paper
Effect of inoculation and nitrogen top-dressing on yield and fodder value of winter pea in wheat mixture
Darko Uher
; Agronomski fakultet, Svetošimunska 25, 10000 Zagreb
Zvonimir Štafa
Mihaela Blažinkov
Abstract
Two year field trials (1999-2001) were carried out to determin the effect of seed winter pea inoculation and nitrogen top-dressing on number and activity of pea root nodules and also on the green mass and dry matter yield of winter pea cv. Maksimirski ozimi and wheat cv. Sana mixture. Just before sowing the inoculation of pea seeds was performed by the indigenous variety of Rhizobium leguminosarum bv. viciae which is part of the microbial collection of the Department of Microbiology at the Faculty of Agriculture University of Zagreb. In the investigation period (25th April, 2000 and 2001) the highest total nodule number on pea root was determined on the inoculated variant (154) as well as active nodule 144. Average mixture green mass yield were ranging from 46,3 t ha-1 (control) up to 54,7 t ha-1 (inoculation). Pea mass content in total green mass yield was from 28 % (nitrogen top-dressing) up to 34 % (control). Total dry matter yields were ranging from 11,65 t ha-1 (control) up to 13,25 t ha-1 (nitrogen top-dressing). Inoculated mass variant 2 and control variant 1 had (29,6 % and 28 %) a higher pea mass content in respect to nitrogen top-dressing variants 3 and 4 (23,8 and 22,5 %). Pea crude proteins yields in 2001 were ranging from 196 kg ha-1 (control) up to 300 kg ha-1 (inoculation) and for wheat, those values ranged from 1 707 kg ha-1 (control) up to 2 111 kg ha-1 (nitrogen top-dressing). Total crude proteins mixture yield were from 1 903 kg ha-1 (control) up to 2 407 kg ha-1 (nitrogen top-dressing).
Keywords
inoculation; nitrogen top-dressing; green mass yield; dry matter yield, fodder value
Hrčak ID:
499
URI
Publication date:
6.10.2005.
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