Accumulation of Microcystin-LR in Grains of Two Rice Varieties (Oryza sativa L.) and a Leafy Vegetable, Ipomoea aquatica

两种水稻品种（Oryza sativa L.）和一种叶类蔬菜（Ipomoea aquatica）籽粒中微囊藻毒素-LR的积累