EFFECT OF ORGANIC AND MINERAL FERTELIZATION IN GROWTH AND YIELD OF POTATO AND CONCENTRATION OF NPK IN PLANT  LEAVE

H.Y.Aldolayme,; K.S.Jawad,; K.J.Abdulrasol,

	EFFECT OF ORGANIC AND MINERAL FERTELIZATION IN GROWTH AND YIELD OF POTATO AND CONCENTRATION OF NPK IN PLANT LEAVE
The Iraqi Journal of Agricultural Science
Article 1, Volume 40, Issue 1, 2009, Pages 56-68
Authors
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Abstract
A Field experiment was carried out to investigate the effects of organic fertilizer(sheep manure) and mineral fertilizers urea and potassium sulfate on growth and yield of potato(Solanum tuberosum L.) plants and concentration of NPK nutrients in plant leaves at different stages of growth in silt loam soil(alluvium). Potato tubers cultivar DRAGA, class “A” at spring season in3x3x3 split- split plots arranged with RCBD of three replicates were planted. Treatments included three levels of decomposed organic fertilizer: 0, 1.5, 3% , three levels of nitrogen fertilizer urea:0, 120 , 240kg N. ha-1 and three levels of potassium fertilizer (K2SO4): 0, 160, 320kg K. ha-1.The tubers were picked (harvested) at the end of MAY -2004. Organic and nitrogen fertilizers significantly affected marketable yield. The treatment M2N2K0(30 ton organic fertilizer ha-1,240 kg N ha-1,0 kg K ha-1) gave the highest tuber 24.35 t. ha-1 .However, this treatment did not differ significantly from M1N2K0 (15 ton organic fertilizer ha-1,240 kg N ha-1,0 kg K ha-1) which gave23.26 t. ha-1 .Concentrations of NPK nutrients in plant leaves at three stages of growth were as follows: growth stage>flowering stage>harvesting stage for nitrogen nutrient and flowering stage>growth stage > harvesting stag for potassium and phosphors nutrients.

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