籼稻高产品种漳丰8号产量形成研究

Yield formation of a high yield indica rice variety -Zhangfeng 8

对漳丰8号的生物学特性、干物质的分配与转运、产量及其构成因素的研究结果表明,高产水稻品种漳丰8号的生物学特征是根系发达、株高100cm左右、茎秆粗壮抗倒伏、冠层叶挺直、分蘖力较强、群体繁茂而不荫蔽。其高产的主要原因是叶面积指数大、干物质积累总量多、库容量大、经济系数高、器官输出率和表观转变率高。并从库源关系的角度,探讨高产水稻的育种途径。

Biological characteristic, distribution and transfer of dry matter, yield and its components of Zhangfeng 8 were studied. The results showed that Zhangfeng 8 possesseed biological characteristics of developed and vigorous root systems, about 100cm in plant height, thicker stems with lodying resistance, upright canopy leaves, strong tillering ability and luxuriant but non-closing populations as well. The main reasons for its high-yielding cultivar were the high leaf area index, high total dry matter accumulation, big sink size (more total grain number and heavy grain weight) and high harvest index (the exporting rate of organizations and appearent transfering rate were higher) . The methods of high-yield breeding in rice were also discussed from the relationship between source and sink.