A.J. Timokhin
Siberian Research Institute on Agriculture of Russian Academy of Agrarian Sciences
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Summary. Realization of the grain legume potential under irrigation depends on complex of mineral nutrition and many other factors, which influence on the vegetation period, planting density forming and yield level. In this connection the aim of our work was to reveal peculiarity of grain legume producing process (peas and broad beans) on the irrigated chernozem-like meadow soil and to define the influence of mineral feed regimes on realization of their biological potential. Researches were conducted in irrigated crop rotation including 8 fields, in 2011-2012 at Siberian Research Institute of Agriculture in southern forest – steppe zone near Irtysh River (Omskoe Priirtishye). Different variants with nitrogenous and phosphorous fertilizer were laid on background with different content of labile phosphorus formed before: from middle level to high one. It was permitted to create the models of different agroacological conditions. Seed yield of pea (Yamalskiy variety) was 2.36 t-ha in the control variant (irrigated without fertilizer). The highest yield was in variant N30 with high phosphorus providing – 3, 52 t-ha. Nitrogenous fertilizer (N30) increased pea seeds protein content from 21, 28% (control variant) to 22, 81 … 23, 01 %. Pea seed yield was increased by interaction of nitrogenous fertilizer combined with phosphate both fresh-drilled and residual at 0, 87 … 1,16 t-ha or 37 … 49%. The broad beans (Sibirskie variety) in the conditions of irrigation without fertilizing created 2, 21 t-ha yield of beans and in the fertilized variants the highest productivity was 2.91 and 2.86 t-ha with nitrogen and phosphorus application accordingly. Nitrogen-phosphate plant nutrition had weak influence on beans protein content that was 31 … 33% and exceeded that parameter in pea seed in 1,5 times.
Keywords: grain legume, pea, broad beans, irrigation, yield, nitrogenous and phosphorous fertilizer.