Comparison of Mineral Contents of Three Rice Varieties under Different Cultural Practices

Abstract

The objectives of this study were to analyze mineral contents of three rice varieties (Josangheugchal, Heugjinjubyeo and Dongjinchalbyeo) under three different cultural practices: five transplanting time (May 15, May 25, June 4, June 14, and June 24), five harvest times (30, 40, 50, 60, and 70 days) and N-fertilization levels (0.0, 4.5, 9.0, 13.5, and 18.0 kg/10a). Mineral contents of Josangheugchal were increased by late transplanting time with increased nitrogen level; however, it was not significantly different by harvest time. Heugjinjubyeo did not show significant difference in three cultivations. Mineral contents of Dongjinchalbyeo increased at the transplanting time of May 25 and June 14 and according to late harvest time. Also mineral contents of Dongjinchalbyeo that did not show significant difference except for calcium according to different nitrogen levels.

Mineral Compositions of Korean Wheat Cultivars

“…For micro minerals, the average values of Cu, Fe, Mn and Zn were 0.18 mg/100 g, 3.78 mg/100 g, 0.82 mg/100 g and 0.94 mg/100 g, respectively. On the other hand, Hwang et al ( 7 ) examined the mineral concentrates of rice cultivar ‘Josaengheugcha (JSHC)’, which is brown rice with reddish-black color. Compared to the results of whole wheat samples, the JSHC contains a lower content of K (221.40 mg/100 g), Mg (92.39 mg/100 g), P (277.30 mg/100 g), and Zn (2.39 mg/100 g), but the JSHC has significantly higher contents of Fe (12.70 mg/100 g) than whole wheat flour.…”