江西早稻高产品种株型特征研究

以江西近年通过品种审定并在生产上大面积推广应用的11个高产早稻品种(组合)为材料,比较分析了其产量、产量构成、成穗特征、茎秆和叶片特征以及干物质生产等特征特性,并筛选出了陆两优996和金优463两个高产早稻品种。高产早稻品种要求单穗重在3 g以上,分蘖力中等,株高90~100 cm,倒1节间长30 cm左右,倒2节间长19 cm左右,倒3节间长13 cm左右;倒2叶长度38 cm左右,倒3叶长度35 cm左右;倒1叶角度10~15度,倒2叶角度17~18度;后期不早衰,乳熟~成熟期干物质生产占全生育期的15%以上。

Studies on Plant Characteristics of Early Rice Varieties with High Yield in Jiangxi Province

Eleven high-yielding early rice combinations which had passed variety certification and had large planting area in Jiangxi province in recent years were used to study the yield,yield components,panicle formation character,stem and leaf character,and the dry matter accumulation.Two early rice combinations Luliangyou 996 and Jinyou 463 were selected.The rice plant characteristics of high yield were as follows: the panicle weight was over 3 g with middle tilling ability,the plant height was 90~100 cm,the top node length was about 30 cm,the second node length to top was about 19 cm,the third was about 13 cm;the second leaf length to top was about 38 cm,the third was about 35 cm;the angle of the top leaf to stem was 10~15°,the angle of the second leaf to stem was 17~18°;no premature senility was showed in later period;the dry matter production in filling period was over 15% of the total accumulation.