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A study was designed to determine the effects on broiler performance of two levels of antioxidant (ethoxyquin) in poultry rations containing two levels of oxidized and non-oxidized soybean oil. One hundred and eighty, day old broiler chicks were randomly divided into six experimental groups comprising thirty chicks on each treatment. Six experimental rations having 2% nonoxidized soybean oil, 2% and 3% oxidized soybean oil, all three supplemented with normal (125 g/t) or higher (175 g/t) level of ethoxyquin, were formulated for both starter (0-28 days) and finisher (29-42 days) phases. These rations were randomly fed to six experimental groups having 30 birds on each ration and three replicates on each treatment. Weight gain and feed conversion ratio (FCR) of chicks fed 2% non-oxidized and 2% oxidized soybean oil were statistically non-significant. Weight gain in groups fed 3% oxidized oil was significantly lower than non-oxidized group while FCR was significantly lower than both groups. Weight gain in the higher level ethoxyquin group was significantly better than lower level, while feed intake and FCR were statistically non-significant in both levels of ethoxyquin. Acid and Thiobarbituric Acid (TBA) values in the three groups differed significantly with the lower in non-oxidized group and highest in the 3% oxidized group. Higher level of ethoxyquin significantly lower acid and TBA values compared to lower level of ethoxyquin. Thus it can be concluded that oxidation of oil reduces its feeding value and that the addition of ethoxyquin is beneficial.

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Purpose This paper aims to contribute an Islamic critique of various competing economic system’s theories of interest, which have evolved within the distinct ideological frameworks of distinct rival economic systems and religions from the point of view of discovering potential effective Islamic economic solutions of the interest-driven modern economic, financial and banking and debt crises and the related problems of inflation, extreme, wealth inequalities and extreme poverty. Design/methodology/approach This historical research paper portrays the chronological evolution of competing narratives and theories of interest in realms of religions, philosophies and rival economic systems for contributing their comparative review and critique from an Islamic point of view in light of the pertinent literature of multidisciplinary history of religions, philosophies and economic thought. It develops an Islamic critique of theories of interest in light of interactions among history of religious thought on interest, history of economic thought on interest and economic theories of interest and the interest-driven economic crises for highlighting potential Islamic interest-free solutions of the modern economic crises in the framework of the Islamic political economy. In light of an Islamic critique of various competing theories of interest, the paper presents pertinent economic policy recommendations for the governments of the countries of the contemporary Muslim world. Findings The interest-free Islamic economic, as well as banking theories and models, offer the potential practical exploitation-free and injustice-free humanitarian solutions of the contemporary persisting macroeconomic crises (national, regional and global economic crises, financial crises, debt crises and banking crisis). Current Islamic discourses on interest and interest-free Islamic banking have effectively promoted the popularity and growth of global Islamic banking industry in the Muslim world in the 21st century. Practical implications Keeping in view a general universal consensus of the Islamic jurists on the elimination of interest of all types from the economy, it is recommended for the Governments of the Muslim countries to implement a consensus-based Islamic banking model, which uses only the Islamic juristic consensus-based Islamic modes of banking and finance – Musharikah, Mudharabah and Al-Qardh Al-Hassan (interest-free loan) – for precluding the possibilities of emergence of controversies about the prospective Riba-free Islamic economic and banking system. Litmus test of the practical success of the interest-free Islamic universal economic and banking system is the successful elimination of all forms of Riba (interest) and all possibilities of its involvement in extractive and exploitative activities in letter and spirit. Originality/value This research paper contributes a comprehensive logical and objective critique of various competing prominent theories of interest from an Islamic economic point of view and highlights their pertinent practical macroeconomic problems-cum-consequences as well as the potential Islamic macroeconomic policy responses in the form of interest-free Islamic banking/monetary/fiscal policies.

Eighteen water buffalo calves of Nili-Ravi breed (about 15 months age and of 147±12 kg average body weight and mixed sex) were used with six animals on each treatment. All the animals were fed long wheat straw for ad libitum intake as the basal ration. Animals in group-I were supplemented with ad libitum amount of urea molasses block having cotton seed meal (CSMB) while the animals in group-II were supplemented with ad libitum urea molasses block containing sunflower seed meal (SFMB) and group III animals were supplemented with a fixed amount of commercial concentrate feed (CCF). The experiment lasted for a period of 80 days (April to June). Results revealed a significantly decreased total feed intake (wheat straw+supplements) in group-III (1,666±52 g/h/d) as compared to group I (2,299±194 g/h/d) and group-II (2,193±230 g/h/d). Average daily supplement intakes were 891±87; 666±104 and 593±0 grams per head in group I, II and III, respectively. Supplement intakes among groups were different (p<0.05). Average daily body weight gains (g/h) were 214±25, 174±23 and 183±24 for group I, II and III, respectively. Feed conversion ratio (FCR) was found to be 10.74±1.12, 12.60±0.88 and 9.90±1.33 grams for group No. I, II and III, respectively. The economic net benefit of live weight gain of calves were 7.63, 6.11 and 7.33 rupees/h/d for group No. I, II and III, respectively. Thus SFM can replace CSM and urea molasses blocks can replace commercial concentrates as supplement to basal ration of wheat straw.