水稻单株产量与根系主要几何属性的定量关系  

Quantitative Relationships between Main Geometric Properties of Root System and Individual Plant Yield in Rice

作　　者：刘永霞[1] 岳延滨[2] 刘岩[1] 曹宏鑫[1] 葛道阔[1] 魏秀芳[1] 

机构地区：[1]江苏省农业科学院农业资源与环境研究所,数字农业工程技术研究中心,江苏南京210014 [2]南京农业大学,江苏南京210095

出　　处：《江苏农业学报》2010年第3期456-461,共6页Jiangsu Journal of Agricultural Sciences

基　　金：“十一五”国家高技术研究发展计划专题课题(2006AA10Z230);“十一五“高技术研究发展计划专题子课题(2006AA10Z219-1);江苏省农业科技创新基金课题(110715);江苏省博士后基金项目(5910907);江苏省农业科学院博士后基金项目(6510733)

摘　　要：为揭示水稻单株产量与不同生育阶段根系主要几何属性的定量关系。以两优108(杂交籼稻)、86优8(杂交粳稻)和南粳43(常规粳稻)为材料,设施肥(N:每盆3.6 g;P2O5:每盆0.8 g;K2O:每盆3.6 g)与不施肥2个水平,共6个处理,采用塑料桶土培。在试验观测的基础上,建立回归模型及模型统计量,结果表明拔节期至灌浆末期水稻单株产量与单株总根长及单株总根表面积之间的定量关系以二次模型较好,分蘖初期至拔节期根系几何属性与单株产量关系则以三次模型拟合较好;单株产量与根系各参数相关分析结果表明单株总根长、总根表面积及总根体积的增加有利于提高产量。The objectives of this study were to build the best-fit mathematical models for quantitative relationships between the individual plant yield and the main geometric properties of rice root system in different growth stages.Three rice cultivars,Liangyou 108（indica hybrid rice）,86 You 8（japonica hybrid rice） and Nanjing 43（conventional japonica rice）,were planted in pots,applying fertilizer at rates of 3.6 g N,0.8 g P2O5 and 3.6 g K2O per pot as treatment,and no fertilizer as control.Based on the experimental observations,the mathematical models were developed by regression analysis.Cubic model was the best-fit relationship between the geometric properties of rice root system and the individual plant yield except the best-fit quadratic equation between the yield of individual plant and the total root length per plant,and total root surface area per plant during jointing to end filling periods.Correlation analyses between yield per plant and various parameters of root system revealed that increasing total root length,total surface area and total volume per plant will be of benefit for raising rice yield per plant.

关 键 词：水稻 根系 几何属性 单株产量 

分 类 号：S511.01[农业科学—作物学]