As the study focused on arriving at an ameliorative measure for disorders arising on cooked rice-based feeding regimen cooked rice samples were estimated for their proximate principles soluble and insoluble ash and mineral profile. Rice samples for chemical analysis were collected throughout Tamil Nadu from dairy farmers who were following rice-based feeding regimen. Samples were collected from all the 32 districts of the state. In each district samples (100g of rice) were collected from four different locations. No significant (p>0.05) variation existed in the proximate composition, soluble ash and acid insoluble ash of cooked rice across districts of Tamil Nadu. Cooked rice was found to be an optimum source of crude protein. Across districts the crude protein ranged between 9.2 to 12.6 per cent. The cooked rice samples were a very poor (below (1%)) source of crude fibre. The soluble carbohydrate as indicated by nitrogen free extracts (NFE) was above 84 per cent in the samples analyzed. No significant (p>0.05) variation existed in the major mineral composition of cooked rice across districts of Tamil Nadu. No significant (p>0.05) variation existed in the trace mineral composition of cooked rice across districts of Tamil Nadu. Cooked rice had a low crude protein ranging between (9.2 to 12.6%) but had a very high nitrogen free extract (NFE) of (above 84%) indicating a very wide gap in the available nitrogen to available soluble carbohydrate. Hence, it is advocated to provide adequate degradable protein to ferment available carbohydrate in the cooked rice to increase microbial protein production and reduce the fermentation of energy to lactic acid and thereby reduce the risk of acidosis. Cooked rice was also a very poor source of sulphur (0.68ppm on DMB). Hence, when nitrogen supplementation is carried out, the maintenance of N: S ratio of 12:1 is critical. Cooked rice was also a very poor source of copper (0.01ppm on DMB) and cobalt (0.006ppm on DMB) necessitating its supplementation.
Key words: Cooked Rice, Energy, Nitrogen, Proximate, Tamil Nadu