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Milled Rice Quality and Physicochemical of Korean Native Rice Cultivars Grown in Different Crop Residue and Tillage Management  

Lee Byung Jin (College of agriculture, Gyeongsang National University)
Son Young Son (National Institute of Crop Science, RDA)
Ahn Jong Wwoong (Yeongnam Agricultural Research Institute, NICS, RDA)
Park Jae Hyun (College of agriculture, Gyeongsang National University)
Kang Jin Ho (College of agriculture, Gyeongsang National University)
Choi Zhin Ryong (College of agriculture, Gyeongsang National University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.50, no.spc1, 2005 , pp. 77-84 More about this Journal
Abstract
Three new rice farming systems, i.e. (1) straw-mulched no-till rice cropping system(SMNTRCS), (2)straw-mulched no-till rice-vetch cropping system (SMNTRWCS), (3)conventional rice-barley cropping system(CRVCS) have been established and compared with (4)conventional rice cropping system(CRCS). Grain appearance of brown rice of Korean native rice cultivars in SMNTRCS and SMNTRVCS were better than those in CRBCS and CRCS. Grain appearance of milled rice in SMNTRCS was better than those of other cropping systems. Korean native rice cultivars showed more white belly and broken rice than those of recommended rice cultivars. Mg and K contents of Korean native rice cultivars were the highest in SMNTRVCS. Protein contents of all the cultivars tested were the highest in SMNTRCS. Protein contents of Korean native cultivars were higher than those of recommended cultivars. Amylose contents of the cultivars tested were from 16 to 22 percent, while those of Aedal and Jenmjo were significantly higher than those of the other cultivars. Alkali digestibility values(ADV) of milled rice grain, tested in $1.2\%$ potassium hydroxide for 23 h at $30^{\circ}C$, showed varietal differences and the cultivars grown in CRBCS were the highest and the lowest in CRCS.
Keywords
milled rice quality; rice; cropping system; straw-mulched; no-till;
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