摘要
【目的】研究优质籼稻花后干物质积累、流转与籽粒生长的动态特征及相互关系。【方法】2007年早晚季，进行桂华占、八桂香、珍桂矮（CK）3个籼稻品种试验。【结果】优质籼稻花后单株叶片和茎干重大，叶片干物质的运转率和运转速率高，但茎中干物质的运转与对照的差异较小。3个水稻品种籽粒干重的动态均可用Richard方程进行模拟，但优质品种的灌浆起动快、活跃灌浆期长，最大灌浆速率小。花后茎叶干物质的再运转占籽粒干重的1／5—1／3，其中优质品种花后叶的再运转对籽粒生长的贡献是对照的1．5-2．O倍。【结论】相关分析表明，花后叶的干物质运转与籽粒生长的关系密切，因此单株叶片干重大、花后运转率高是优质籼稻品质形成的重要生理原因之一。
[Objective]Field experiments were conducted to investigate the post-anthesis accumulation and remobilization of dry matter and grain growth characteristics in high quality indica rice. [Method]Three indiea rice varieties, viz., Baguixiang, Guihuazhan and Zhengui＇ai （CK） were used in field experiments during the early and late cropping seasons in 2007. [Results]High-quality rice varieties Baguixiang and Guihuazhan showed higher dry weight of leaf and stem in single shoot, as well as higher dry matter translocation ratio and rates in leaf after heading stage. Little difference was observed in dry matter remobilization in stem between the high-quality rice and the control after heading. Dry matter accumulation in grains of three rice cultivars were simulated using Richard equation, high-quality rice revealed early start in initial filling, longer period of active filling and lower maximum filling rate. About 1/5^th-1/3^rd part of dry matter in grain was found to come after remobilization of dry matter from leaf and stem after heading. [Conclusion]The data indicated that grain growth was correlated with dry matter redistribution in leaf. It can be concluded that higher dry matter accumulation in leaf and its remobilization was one of the most important physiological reasons for imparting high quality in rice.
出处
《南方农业学报》
CAS
CSCD
2011年第1期16-21,共6页
Journal of Southern Agriculture
基金
Guangxi Graduate Education Innovation Program Funded Projects (2007105930901M75 and 2009105930901D010)
关键词
优质籼稻
干物质积累
干物质流转
籽粒生长
动态特征
high-quality indiea rice
dry matter
accumulation
remobilization
grain growth
grain filling
