小麦组织氮的积累与分配及其相关性研究

Study on tissue nitrogen accumulation and partitioning and their correlation

对１７ 个澳大利亚小麦品种的组织氮研究表明：品种间组织氮含量存在不同程度差异。叶片、茎秆和植株氮积累峰值分别出现在抽穗初期、灌浆初期和灌浆末期；花期前氮素主要积累在叶片中，花期后籽粒成为氮素最主要的贮藏器官。植株氮积累（ｇ／ｍ ２）与干物质积累呈极显著正相关，而与其果糖积累、籽粒产量、籽粒蛋白质产量及含量无显著相关关系；植株氮含量（ｇ·ｋｇ－ １）与其干物质积累、果糖含量和籽粒产量均呈显著负相关，与籽粒蛋白质含量显著正相关。

Tissue nitrogen accumulation and partitioning and their correlation with dry matter,tissue fructan,grain yield and grain nitrogen (protein) content in seventeen wheat ( Tricticum,aestivum L.) varieties were studied.The results showed:The varieties displayed significant differences in tissue nitrogen content at most sampling dates.Tissue nitrogen accumulation of leaf,stem and plant peaked at the begining of heading,milking stage and the end of grain filling stage.Leaf was the main vegetative tissue for dipositing nitrogen prior to anthesis,but after anthesis was grain.Plant tissue nitrogen accumulation (g/m 2) were significantly positively correlated with its dry matter,but not significantly correlated with their fructan accumulation,grain yield,grain nitrogen (protein) yield and content.Plant tissue nitrogen content (g·kg -1 ) was negatively correlated with their dry matter,fructan content and grain yield,but closely positively correlated with grain nitrogen (protein) content.