超高产杂交水稻超优1000的生物学特性及抗倒性研究

Biological Characteristics and Lodging Resistance of Super High Yielding Hybrid Rice Chaoyou 1000

比较研究了超高产杂交水稻超优1000与对照Y两优1号、9311的产量构成、物质生产特性和抗倒性差异。结果表明:超优1000较对照增产显著,实际产量分别较Y两优1号、9311增产25.5%和39.3%;库容量大和生物量高是超优1000具超高产潜力的关键原因,大库容量主要靠培育大穗,物质生产优势集中在后期。超优1000还具有其它显著的生物学特点:叶面积指数及粒叶比大,叶片功能期较长,株高适中、节间配置合理,穗下节间长,基部节间短、粗、厚,高度抗倒。

The differences of the characteristics of grain yield,yield components,dry matter production and lodging resistance were compared in field between super high yielding hybrid rice variety Chaoyou 1000 and two check rice varieties Y Liangyou 1 and 9311. The results showed that the grain yield of Chaoyou 1000 was significantly higher than those of the check varieties,with 25. 5% and 39. 3% of harvest yield increase to Y Liangyou 1 and 9311,respectively. The larger sink capacity and higher biomass production were the key factors for the higher yield of Chaoyou 1000. Its large sink capacity mainly depended on its large panicle size,and its superiority in dry matter production occurred particularly at the late growth stage. A higher leaf area index and grain-leaf ratio,a longer leaf function period,appropriate plant height,reasonable internode configuration,a longer uppermost internode,shorter and thicker basal internodes and better lodging resistance were also the superior biological characteristics of super high yielding hybrid rice Chaoyou 1000.