Comparison among Mineral Contents of Commercially Available Rice Which Were Involving Koshihikari, Red and Black Rice

摘要

We collected 16 sample of red rice, 38 sample of black rice, 21 sample of Koshihikari cultivated by only organic fertilizer and 43 samples Koshihikari cultured by conventional farming system between 2004 and 2005 via mail order. Then, we measured 7 mineral contents in these samples, and compared with mineral contents. In the results, it was shown that calcium and potassium content of pigmented rice were higher than those of Koshihikari cultivar. It was shown that Koshihikari cultivated by only organic fertilizer was not significantly difference from those cultured by conventional farming system.