我省水稻主要栽培品种和试验品种的米质测定结果及分析

TESTING RESULTS AND ANALYSIS ON RICE QUALITY OF THE MAIN CULTIVARS AND STRAINS IN JILIN PROVINCE

本文报道了我省水稻主要栽培品种和试验品种的米质分析的结果。指出我省主栽品种达到国家优质米等级标准的极少,特别是极早熟品种的米质较差。应在选育新品种时注重考虑碾米品质和外观品质的改良,并提出了我省优质稻米的标准。

An analysis of grain quality of the main rice varieties cultivated in our province and some experimental varieties was made and the result of the analysis showed that only a few varieties came up to the grading sta- ndard for fine quality of rice and,especially,the grain quality of preca- sious varieties proved comparatively low.In the selective breeding of new rice varieties,the improvement of hulled tice quality and the external appearance of grain should be taken into account. For the excellent quality of rice,the rate of brown rice processed is over 82%,while that of polished rice is over 73%.The rate of unbroken polished rice is over 65% and the rate of abdominal white grains is less than 10%,while the abdominal white area accounts for less than 5%.The length—width proportion ratio of polished rice grain is about 1:6;the weight per thousand polished grains is about 20g;the amylose content in grain is about 17%;the crude protein content in brown rice is about 7%;the rice glue length is over 70mm.The rice paste-producing temperature is low and the cooked rice is soft and palatable.