Abstract
Several kinds of vegetables and cultivars of turnip rapes were analyzed for four calcium components. The components were : 1) water soluble calcium, consisting of organic acid salts, inorganic salts, and calcium ion, 2) 1N NaCl soluble calcium pectate and protein binding calcium, 3) 2% acetic acid soluble calcium phosphate, and 4) 5% HCl soluble calcium oxalate. 1. Turnip rape contained the highest content of total calcium and water soluble calcium compared to chrysanthemums, lettuce, spinach, and welsh onions. In turnip rapes, the major calcium component was water soluble calcium. 2. Among four cultivars of turnip rape (Brassica napus L.), 'Miyauchina', 'Shinkirina', 'Keichikuzairai', and 'Gogatsuna', 'Keichikuzairai' had the highest content of water soluble calcium and 2% acetic acid soluble calcium. 3. Among three cultivars of turnip rape (Brassica campestris L.), 'Komatsuna', 'Bitaminna', and 'Haruna', 'Haruna' possessed the highest content of water soluble calcium.
