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以通过审定的超级稻组合Ⅱ优航1号为材料,研究其生物学特征、干物质积累、产量及其构成因素,结果表明:Ⅱ优航1号株高115.0 cm左右,茎秆粗壮抗倒伏,冠层叶挺直,成穗率48.57%,整个生育期的干物质总量为2011.0 kg/hm2,产量为11656.0 kg/hm2。其高产的主要原因是分蘖力中等,成穗率较高,生长中、后期群体适中,个体健壮,生长中、后期的净同化率和群体生长率显著提高,增加了每穗粒数、库容量和干物质积累,提高了稻谷产量。并从株高、茎叶形态、库源关系等角度,探讨高产水稻的育种途径。
The results showed that the plant height of Ⅱ Youhang 1 was about 115.0 cm and the stalk was sturdy and lodging resistant , The canopy leaf was straight, the earing rate was 48.57%, the total dry matter of the whole growth period was 2011.0 kg / hm2, and the yield was 11656.0 kg / hm2. The main reason for its high yield was medium tillering ability, high spike rate, moderate growth in the late period, individual robustness, significantly increased net assimilation rate and population growth rate in the middle and late growth stages, increased grains per spike, And dry matter accumulation, increased rice production. The breeding methods of high yielding rice were discussed from the aspects of plant height, stem and leaf morphology,