【摘要】 采用盆栽试验以红壤设置不施磷(有效磷0.02mg·kg-1)和施磷(有效磷69.76mg·kg-1)、不施氮(有效氮156.7mg·kg-1)和施氮(232.18mg·kg-1)4种处理,以16个形态性状的相对指标用SPSS软件分析了来自云南省16个州548份云南稻核心种质氮磷高效的地带性特征,结果表明:低有效磷胁迫下云南稻核心种质形态性状生态差异磷效应明显高于氮效应;提出了茎蘖数、秆重、生物产量、根重、全株重和穗重共6个相对指标既可作为云南稻核心种质磷高效和氮高效基因型筛选的理想指标,又能反映州市间核心种质氮磷高效的地带性特征。聚类分析显示云南16个州市稻核心种质氮高效和磷高效特性划分为3个地带性区域,并与山脉水系、土壤肥力、生态因子和遗传多样性有关。更多还原

【Abstract】 Zonal characterstics of nitrogen and phosphorus efficiency of rice landraces were investigated,based on relative index of 16 morphological traits within the core collection of 548 accessions from 16 prefectures in Yunnan Province,using SPSS software analysis and potted plant trials with red soil,and setting four treatments between unapplied phosphorus(available phosphorus 0.02 mg·kg-1)versus applied phosphorus(available phosphorus 69.76mg·kg-1)as well as unapplied nitrogen(available nitrogen 156.7mg·kg-1)and applied nitrogen(available nitrogen 232.18mg·kg-1).Results are as follows:Ecological difference of phosphorus response of morphological traits for rice landraces in Yunnan under phosphorus deficiency stress is more significantly than that of nitrogen response;The relative index of six traits(stem-tiller number,stalk weight,biomass,root weight,total plant weight and spike weight)are gene type screening index for nitrogen and phosphorus efficiency tolerance of core collection for rice landraces in Yunnan,and reflecting its zonal characterstics of nitrogen and phosphorus efficiency.Cluster analysis showed that 16 prefectures are divided into three zonal type based on the nitrogen and phosphorus efficiency characterstics of core collection for rice landraces in Yunnan Province,and it is associated with the cordillera,water system,soil fertility,ecological factors and genetic diversity.更多还原