不同生态条件下不同基因型小麦干物质和氮素积累与分配特征.PDFVIP

南京农业大学学报 　2004 , 27 ( 1) : 1～5 　 Journal of Nanjing Agricultural University 不同生态条件下不同基因型小麦干物质 和氮素积累与分配特征 荆奇, 戴廷波, 姜东, 曹卫星 , 孙传范 (南京农业大学农业部作物生长调控重点开放实验室 , 江苏 南京 210095) 摘要 : 以40 个主栽小麦品种/ 品系为材料 , 研究了不同基因型小麦籽粒干物质与氮素的来源及累积转运过程 , 分析了氮 素累积转运的基因型差异及其对生态环境的反应。结果表明 , 不同环境下小麦植株干物质与氮素的积累与转运差异明 显 , 籽粒蛋白质含量不同的小麦基因型 , 植株氮素与干物质的积累与分配过程有显著的差异。干物质与氮素的再分配是 同步进行的 , 籽粒蛋白质含量与花后合成氮素的再分配量呈极显著正相关 ( r = 0637 5 ) , 而籽粒产量的提高有赖于 花后植株氮素吸收合成能力及光合能力的增强。 关键词 : 小麦 ; 干物质 ; 氮素 ; 转运 ; 环境 中图分类号: S311 　　　文献标识码 : A 　　　文章编号 : 1000 2030 (2004) 01 0001 05 Characteristics of accumulation and translocation of dry matter and nitrogen in wheat genotype s under different environments J ING Qi , DAI Tingbo , J IANG Dong , CAO Weixing , SUN Chuanfan ( Key Laboratory of Crop Growth Regulation , Ministry of Agriculture , Nanjing Agricultural University , Nanjing 210095 , China) Abstract : Forty wheat cultivars/ lines were grown in two locations of eastern China to study the effects of genotype and environment on the accumulation and translocation of dry matter and nitrogen in plant. The results showed that the effects of environment and genotype on the translocations of dry matter and nitrogen were significant in wheat plant and cotranslocation of dry matter and nitrogen was found. There was significant positive correlation between grain protein content and nitrogen assimilation after anthesis. It seems that higher grain yield de pends on improving plant