杂交早稻旱育秧生育特性及产量形成规律研究Ⅲ旱育秧的分蘖成穗特性

Study on the growth and development characters of dry nursery seedlings and their regularities of yield formation in hybrid early rice Ⅲ. Characteristics of tillering and earing of dry nursery seedlings

以水育秧为对照 ,研究了旱育秧大苗的分蘖成穗特点。结果表明 :旱育秧秧田分蘖基本遵循叶龄同伸规律 ,单株分蘖数明显高于水育秧 ,其本田分蘖保持了数量上的优势 ,但多为高次位分蘖。旱育秧秧田和本田分蘖的成穗率均低于水育秧。旱育秧低节位分蘖穗虽多 ,但高次位分蘖穗也多 ,每穗总粒虽多 ,但结实率低 ;

Characteristics of tillering and earing of dry nursery seedlings (DNS) were investigated by contrast to the paddy nursery seedlings (PNS). The result indicated that: the tillers of DNS grew basically coincident with synchronous growth of leaves in the nursery seedling bed. The DNS maintained the superiority of their tillers in quantity after transplanting, but its tillers, which generated in secondary tiller nodes, were more than that of the PNS. There were more tillers and panicles per plant and more spikelets per panicle in the DNS; however, the DNS brought some unfavorable characters, such as less percentage of earing and ripened grains.