优质高产两系法杂交稻新组合粤杂122的某些形态生理特性

MORPHOLOGICAL AND PHYSIOLOGICAL CHARACTERISTICS OF TWO-LINE RICE HYBRID YUEZA 122 WITH FINE GRAIN QUALITY AND HIGH-YIELDING POTENTIAL

1998年早季在广州的自然生态条件下观察研究了粤杂122的某些形态生理特性,结果认为这个两系法杂交稻新组合属早稻早熟,从插种到始穗历期为83d,在偏酸偏瘦的砂质粘壤土上按常规方法栽培时产量仍可达6723kg hm-2且米质为一级。粤杂122生育前期表现出较强的生长优势,其叶鞘/叶片长度比值小,LAI和干物质增长快,有效分蘖数量多,收获指数达到0.578。但是出穗至乳熟期剑叶及以下二片功能叶的开张角度偏大。

The morphological and physiological characteristics of Yueza 122 grown under natural ecological conditions were studied in the early cropping season of 1998 at Guangzhou. The results showed that it was an early maturity hybrid combination with duration of 83 d from sowing to heading in the early cropping season. It gave a yield of 6723 kg hm-2 although it was grown in the acidulous and thin soil with conventional culture methods. The kernal quality was fine and up to the 1st class of Guangdong grain quality standard. Yueza 122 had vigorous growth, small ratio of sheath to blade length, faster increment of leaf area index and dry matter, more effective tillers and a harvest index of 0.578 at the early growing stage. However, the top 2 leaves had larger orientation angle during stages from heading to milk ripening.