Magnesium in the water of Japanese quails kept under comfort zone and under thermal stress

The objective was to evaluate the increasing levels of magnesium in water supplied laying quails (Coturnix coturnix japonica), kept climatic chambers under thermoneutral temperature and thermal stress, on their performance morphometry organs. birds were distributed a completely randomized design, 2x4 factorial arrangement, 2 temperatures (24 32 ºC) 4 (50, 150, 250 350 mg L-1), with six replicates eight per experimental unit. data subjected analysis variance means compared by Tukey test at 5% probability level. did not affect (P > 0.05) production organs, less consumption level 150 L-1, °C had reduction feed conversion, but without affecting organ morphometry. Japanese phase can consume up L-1 having organs affected raised an environment °C.