【摘要】 对不同株型水稻品种“吉农大 3号”(穗数型 )、“吉农大 13号”(穗重型 )的一些生育性状及产量因素进行了研究。结果为 :1 分蘖力、有效分蘖穗数“吉农大 3号”明显高于“吉农大 13号” ;2 抽穗前地上部分单穴干物质重及抽穗后叶龄指数“吉农大 13号”均高于“吉农大 3号” ;3 叶面积指数动态变化“吉农大 13号”比“吉农大 3号”合理 ;4 “吉农大 13号”产量构成主要以结实率和单穗粒数为主 ,在栽培技术上主攻结实率。“吉农大3号”产量构成主要是以每穴穗数为主 ,在栽培上以保持有较大的分蘖力为好 ,这样才能充分发挥两品种的潜力。更多还原

【Abstract】 Characters of growth and yield component factors of different rice plant types of Jinongda 3 (panicle number type of JND3) and Jinongda 13 (panicle weight type of JND13) were studied The results showed that: 1 the tillering ability of JND3 was obviously higher than that of JND13 and so was the effective tillering panicle number; 2 dry weight of single holes of JND13 before heading was higher than that of JND3 and so was the leaf age index after heading; 3 dynamic variation of leaf area index of JND13 was more reasonable than that of JND3; 4 the main yield component factors of JND13 were mainly seed setting percentage and grain number per panicle, and panicle number per hole was mainly for JND3 On the basis of the former results, the improvement of cultivating technology of JND13 should be especially focused on seed setting percentage and grain number per panicle while in cultivating JND3 it is more beneficial to retain higher tillering ability Only in this way can the capabilities of the two varieties be tapped更多还原