Bui Phan Thu Hang et al., 2013. Livest. Res. Rural Dev., 25 (3): 10

Weaned crossbred rabbits (n=30) were allocated to a 2*5 factorial design, to compare: (i) water spinach (WS) as the only foliage, or offered at 50% of observed intake in treatment WS with ad libitum water hyacinth leaves (WHL); and (ii) levels of paddy rice (PR) of 0, 5, 10, 20 or 35 g/day. There were linear increases in growth rate on WS and WHL treatments as the offer level of paddy rice was increased up to 20 g/day, with no further increase at the 35 g/day level. At all levels of paddy rice the growth rates on water spinach as the sole forage were almost double those when the water spinach was restricted and water hyacinth leaves were fed ad libitum. There were improvements in feed conversion as the level of paddy rice was increased, and poorer results when water hyacinth leaves replaced 50% of the water spinach.