Effect of Organic Fertilizers on Total Weight Gain Daily Growth Rate Rate and Feed Conversion Efficiency of Common Carp Cultured in Rice Fields

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Makki Mohamed Abdel Hussein, Muhammad Shaker Al-Khshali

Abstract

The study was conducted to investigate the effect of organic manure (cow dung) on common carp fish Cyprinus carpio cultured in rice fields on an area of ​​400 m2, 20 m * 20 m. The land was divided into four rice fields, the area of ​​each field is 100 m2 with equal dimensions of 10 m * 10 m, and each field contains a trench with 50cm wide and 80 cm deep, which served as a refuge for fish at a density of 1 fish/m2   using four treatments:  T1 adding organic manure (cow waste) without providing fish feed, T2 adding organic manure with feed for fish, T3 do not add organic manure with providing fish feed, T4do not add organic manure and not provide fish feed, fish were weighed every 14 days. Results of the statistical analysis showed significant differences (p≤0.05) for the total weight gain and daily growth rate, the treatment T2 outperformed the rest of the treatments, followed the treatment T3, which outperformed treatments T2 and T1 respectively. As for the rate and efficiency of feed conversion, results of the statistical analysis showed no significant differences (p≥0.05) were recorded between treatment T2 and T3.From the foregoing results of the current study, it can be concluded that it is possible to apply the culture of common carp in rice fields in Iraq using organic fertilization and supplementary feed, without adding pesticides or chemical fertilizers.

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