宜优673在福建不同地区的稻米品质性状表现
Traits of Yiyou 673 in Different Sowing Sites of Fujian
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摘要: 对福建省12个不同种植地点的宜优673晚稻稻米品质进行检测研究, 并探讨温度因子 (日均温、日极端最高温、日极端最低温和日较差) 对稻米品质各理化性状的影响程度。结果表明:不同种植地点宜优673垩白度差异最大, 垩白率次之, 透光率和整精米率差异程度居中, 碱消值、胶稠度和直链淀粉含量的差异较小, 糙米率、精米率差异最小。研究还表明:在灌浆期间日极端最高温、日较差与垩白度、垩白率呈正相关关系, 随着日极端最高温升高, 日较差增大, 宜优673的垩白有增大的趋势;而日极端最低温与垩白度、垩白率呈负相关关系, 随着日极端最低温的降低, 垩白呈增大的趋势。在全省12个试验点中, 福州、莆田和诏安3个试验点种植的宜优673所有品质指标均达到优质标准, 其余试验点种植的宜优673有1项或2项品质指标 (垩白率、垩白度) 未能达到优质标准。宜优673在福建省东南沿海一线作晚稻种植, 能表现出最好的品质性状和商品价值。Abstract: The rice qualities of the combination Yiyou673harvested in late-season from 12different planting areas were analyzed and the influence of temperature factors including average temperature, extreme maximum temperature, extreme minimum temperature, and daily range of temperature and so on to physico-chemical properties was explored.The results showed that chalkiness score was the most significantly different, chalky rice rate was the second significantly different, transparence and head milled rice rate were the third significantly different, alkali spreading value and del consistency and amylose content were less significantly different, brown rice rate and polished rice rate were the least significantly different for the variety Yiyou673harvested from different areas.The results also indicated that the correlationship between extreme maximum temperature and chalky rice rate, chalkiness rate was positive, and the same as extreme minimum temperature during grouting period.But the correlation between extreme minimum temperature and chalky rice rate, chalkiness rate was negative.Chalky rice rate and chalkiness rate were increased gradually with the ascended of daily range and extreme maximum temperature, and the reduced of extreme minimum temperature.The quality indexes of Yiyou 673harvested from Fuzhou, Putian and Zhaoan achieved high quality standard.But one or two quality indexes of Yiyou 673harvested from the other sites did not achieve high quality standard.The best qualities and commercial qualities of the variety Youyi673 sowed in the South-East coastal areas of Fujian in late-season could be achieved.