华南双季超高产水稻分蘖盛期生理性状研究  

Physiological characteristics of South China double cropping super high-yielding rice at active tiilering stage

作　　者：陈友订[1] 万邦惠[2] 张旭[1] 

机构地区：[1]广东省农业科学院水稻研究所,广东广州510640 [2]华南农业大学农学院,广东广州510640

出　　处：《福建农业学报》2004年第4期198-201,共4页Fujian Journal of Agricultural Sciences

基　　金：广东省科技创新百项工程项目(2KB64804N)广东省自然科学基金项目(990501)。

摘　　要：在早、晚季水稻分蘖盛期，测定了华南稻区6个不同类型超高产水稻品种(组合)的干物重、功能叶叶绿素(a+b)含量、叶面积指数、根系活力和净光合速率等主要生理性状，并应用数理统计方法分析了品种(组合)间各性状的差异显著性及对干物重的综合作用，以及早、晚季不同生态环境对上述生理性状的影响·提出华南双季超高产水稻动态株型育种中分蘖盛期适宜的生理指标量值为：功能叶叶绿素(a+b)含量早季3.9～4.2nlg·g^(-1) 、晚季4.0 mg·g^(-1).根系活力早季270～348pg·g^1·h^(-1)、晚季318μh^(-1)·g^(-1)·h^(1)，叶面积指数早季2.4～2.7、晚季3.8，功能叶净光合速率早季24.8μmol·m^2·s^1、晚季23.3μmol·m^(-2)·s^(-1)。The main physiological characteristics of six South China super high-yielding rice varieties(combinations).including dry matter weight,chlorophyll contents(a+b)of the functional leaves.leaf area index(LAI),root activity and net photosynthetic rate were measured at the active tillering stage in both early and latecrops.The significance of difference among these physiological characteristics and the effects of these physiologicalcharaetenstics to dry matter weight,and the effects of different environments between early and late crops wereanalyzed by using statistics methods.The required physiological values at the active tillering stage for dynamicplant type breeding of South China double cropping super high-yielding rice were put forward.They were 3.9-4.2mg·g^(-1)in the early crop and 4.0 mg·g(-1)m the late crop for the ideal chlorophyll contents(a and b)of thefunctional leaves.270—348/μg·g^(-1)·h^(-1)in the early crop and 318 μg·g^(-1)·h^(-1)in the late crop for the ideal rootactivity.2.4—2.7 in the early crop and 3.8 in the late crop for the ideal leaf area mdex.24.8 μmol·m^2·s^1 inthe early crop and 23.3 μmol·m^2·s^1 in the late crop for the ideal net photosynthetic rate of functional leaves.

关 键 词：超高产水稻 株型 分蘖盛期 生理特性 

分 类 号：S511.01[农业科学—作物学]