摘要
以日本和IRRI的9个水稻品种为材料,分别以武香粳9号和两优培九为对照,在江苏南京和云南丽江研究了不同水稻基因型干物质积累与源库形成特征及其在不同生态环境下的差异.结果表明,生态环境对水稻产量和干物质积累量影响显著.高产水稻品种积累了高额干物质量,且干物质生产优势在中后期.高产品种的总颖花量、LAI及群体生长速率(CGR)都较高.稻谷产量随干物质积累总量的增加而提高,与齐穗后干物质积累量、总颖花量和LAI呈极显著正相关,与粒叶比呈显著正相关.与云南丽江点相比,群体LAI、单位面积颖花量和抽穗后干物质积累量少及生长速率(CGR)低是南京点稻谷产量低的关键因素.
With nine Japanese varieties and two local cultivars of rice as test materials,this paper studied the characteristics of their yield-formation and source-sink characteristics under different eco-environments of Nanjing and Lijiang.The results showed that eco-environment had an obvious effect on rice grain yield and dry matter accumulation.High-yielding rice genotypes could accumulate more dry matter,especially in their late growth period.They had higher total spikelet number,leaf area index (LAI) and crop growth rate (CGR),as compared with other genotypes.The grain yield increased with increasing total dry matter accumulation,and significantly positively correlated with dry matter accumulation after heading,total spikelet number,LAI,and spikelet/ leaf area ratio.The results suggested that the lower grain yield in Nanjing than in Lijiang was mainly resulted from the lower LAI,total spikelet,dry matter accumulation and CGR after heading.
出处
《应用生态学报》
CAS
CSCD
北大核心
2005年第4期615-619,共5页
Chinese Journal of Applied Ecology
基金
国家自然科学基金重点项目 (3 0 0 3 0 0 90 )
国家"863"计划资助项目 (2 0 0 3AA2 0 90 3 0 )
