Effect of Organic and Inorganic Fertilizer on the Physicochemical Properties of Some Rice Varieties under Sudan conditions

Abstract

Field experiments were conducted at the experiment field of college of Agriculture Studies, Sudan University of Science & Technology, (Lat. 15⁰ 40'N, Long. 32⁰ 32' E), to observe the influence of organic and inorganic fertilizers on physicochemical properties of rice. The experiments were designed in Randomized Complete Block and laid out in split-plots arrangement, replicated four times; The experiment comprised six treatments viz., control (no fertilizer), recommended dose of chemical fertilizers urea 46%N+superphosphate, compost at 12 t ha^-1, pellet granules at 60kg ha^-1, effective microorganism EM at 15 liters ha^-1 and combination of urea 46%N+superphosphate + compost. Three varieties namely, Kosti 1, Omgar, and Nerica 4 were used. The laboratory experiment was conducted at Division of Cereal Technology, Food Research Center at Shambat. Results showed that the application of different organic manure and inorganic fertilizer resulted in significantly better parameters. Grain length, length/width ratio, hundred seed weight, crud protein, fiber, fat, ash and carbohydrate were significantly affected by fertilizer, but grain width, teste, moisture percentage and carbohydrate were not significantly affected by fertilizer. Highest percentages of chemical contents were recorded in organic fertilizers and then chemical fertilizers which were identical to control. Most of studied parameters were significantly affected by varieties. The interaction between fertilizer and variety was insignificant in respect of all grain quality characteristics in first season except grain length, but there were significant different in the second season.