摘要
对12个杂交水稻品种在两类生态条件下的光合特性及干物质积累进行了研究.结果表明:水稻适应环境的能力主要由其自身因素决定,品种之间存在较大差异.品种间的净光合速率和叶绿素含量差异均比生态区域间的差异更显著.产量与总干物质量和净光合速率呈显著正相关,决定系数R2分别为0.584和0.590,与茎鞘物质输出率和茎鞘物质转换率相关不显著.与低光强地区相比,高光强地区叶片厚度和干物质积累量增加,茎鞘物质输出率和茎鞘物质转换率降低.在光照充足的条件下,产量中来自于后期光合积累物质的比例较大;在光照不足的条件下,产量中来自于前期干物质积累及其转运的比例较大.
The study on the photosynthetic characteristics and dry matter accumulation of twelve hybrid rice varieties in the eco-environments with low-and high light intensity showed that the adaptation ability of the varieties to eco-environment was mainly depended on the varieties themselves, and there existed greater differences among them. The differences in net photosynthetic rate （P,） and chlorophyll content （Chl） were more significant among the varieties than between the eco-environments. The grain yield had significant positive correlations with P, and total dry matter mass （TDM）, the determination coefficient R2 being 0. 584 and 0. 590, respectively, but no significant correlations with the export percentage of the matter in stem-sheath （EPMSS） and the transformation percentage of the matter in stem-sheath （TPMSS）. In the eco-environment with high light intensity, the leaf thickness and dry matter accumulation increased, while the EPMSS and TPMSS decreased. Under enough sunlight condition, the high proportion of matter in grain yield was mainly come from the photosynthesis at late growth stages; while under insufficient sunlight condition, it was mainly originated from the early growth stages photosynthesis.
出处
《应用生态学报》
CAS
CSCD
北大核心
2008年第3期505-511,共7页
Chinese Journal of Applied Ecology
基金
国家科技支撑计划重大项目(2006BAB02A05)
四川省育种攻关专项资助项目(2006yzgg-28)
关键词
杂交水稻
生态条件
光合特性
干物质积累
产量
hybrid rice
eco-environment
photosynthetic characteristics
dry matter accumulation
grain yield.
