Many researchers have observed various toxic levels of soluble oxalate for ruminants. For example, McKenzie.
(1988) reported that forage containing soluble oxalate (20.0 g DM/kg) can lead to acute toxicosis in ruminants.
In another study, WeinChang . (2004) reported that the concentration of calcium ions in the blood of cattle and
goats fed napiergrass containing high soluble oxalate (17.4-17.7 g DM/kg)
was lower than in animals fed napiergrass containing low soluble oxalate (9.5-12.6 g DM/kg).
In the present study, the levels of soluble oxalate in all samples were more than 20.0 g DM/kg. Furthermore,
when napiergrass was grown in early summer (first cutting) and/or fertilized with a high level of K (600 kg/ha), the
levels of soluble oxalate were 30.0 g DM/ kg or more.