This experiment was aimed to study the changes of nutrient composition, fatty acid value and mycotoxin contents of stored brown rice, so as to provide data support for the practical application of stored brown rice in animal feeding. Japonica rice in six Heilongjiang province granaries stored from 2015 to 2019, mid-late indica rice in five Anhui province granaries stored from 2017 to 2019 and early indica rice in four Hunan province granaries stored from 2017 to 2019 were collected. The rice was hulled and its nutrient composition, fatty acid v...