author(s)
Ani S Das

abstract
The present study analysed the effect of exogenous administration of phosphorous and dextrose on the reproductive performance of repeat breeding crossbred cows of Kerala. Fifty-two animals that were hard to settle and free from any genital infection but apparently deficient in nutrition were divided in to two groups (GI and GII). Animals in GI are inseminated without any treatment and those in GII were administered 15 ml of Tonophosphan (each ml contained sodium salt of 4-dimethyl amino-2-methyl phenyl-phosphatic acid – 0.2 g) by intravenous injection or 540 ml of 25 percent dextrose by intravenous infusion or both, based on the deficient blood constituents, and then inseminated and followed up. Overall conception rate of animals in GII after treatment was observed as 77.77 percent, where as that in the non-treatment group (GI) was only 11.11 percent. Conception rate in the animals treated with phosphorous alone was 71.42%, against 25.00% of non-treated group. It was observed high conception rate of 75.00% among the animals treated with dextrose infusion against 12.5% in not treated group. In those animals given combined treatment of phosphorous and dextrose, 87.5% increase in conception rate was observed, where no animals in non-treatment group conceived. The results of the present study showed that intravenous administration of phosphorous and dextrose considerably improves the conception rate among repeat breeding cows, which are deficient in those parameters.