EFFECT OF NITROGEN AND POTASSIUM FERTILIZERS ON GREEN FORAGE OF SORGHUM AT AL- ANBAR PROVINCE

E. Hamdan, M.; T. Fezaa, A.; M. Manfi, S.

	EFFECT OF NITROGEN AND POTASSIUM FERTILIZERS ON GREEN FORAGE OF SORGHUM AT AL- ANBAR PROVINCE
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 21, Issue 1, 2016, Pages 0-0
Authors
M. E. Hamdan; A. T. Fezaa; S. M. Manfi
Abstract
To determine the appropriate quantities of nitrogen and potassium fertilizers that should be applied after cutting ,afield experiment was conducted during 2012 and 2013at Al-Anbar/Dawar Research Station.Factorial experiments design( RCBD) with three replications was used. Nitrogen levels(40, 80 and 120 kg N.h-1) and potassium (20, 40 and 60 kg K.h-1) were applied after the first and second cuttings.The highest yield of green fodder(41.67 and 24.54 t.h-1)was obtained after the application of 120 kg N.h-1. While when applied (60 kg K.h-1)It gave 41.11 and 27.50 t.h-1 of green fodder. When N and K fertilizers applied in combination at 12060 kg.h-1 after second cutting gave 42.22 t.h-1 green fodder. While the highest green fodder obtained when applied(120 kg N.h-1) after third cutting (12.94 and 10.354 kg.h-1), as well as the treatment (60 kg K.h-1) gave the highest green fodder(12.66 and 10.687 kg.h-1). The combination of 12060 and 12040 kg.h-1 of N and K respectively, provide a high green fodder yield (13.83 and 11.875 t.h-1) for two season respectively. Despite the depletion of nutrition elements, the increase of green and dry fodder yield, was due to increase in number of tillers and increased of recovery rate of growth affected, when nitrogen applied. The best combination(12060 kg.h-1) of nitrogen and potassium used after each cutting to obtain the highest green and dry fodder yield of sorghum.

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