不同蛋白质含量大豆品种氮素积累、分配和运转规律研究

以3个籽粒产量相近但蛋白质含量差别较大的大豆品种为材料,分析了分枝期后不同器官的氮素积累、分配和运转规律及其对籽粒蛋白质含量的影响.结果表明:结荚前品种之间氮素含量和积累量差别不大,结荚后高蛋白大豆营养器官(叶片、茎秆和叶柄)的氮素含量除个别时期外(叶柄第7周)都高于普通大豆,说明营养器官较高的氮素含量及长时间保持较高...

Nitrogen Accumulation, Distribution and Translocation of Soybean Cultivars with Different Protein Content

In order to investigate nitrogen dynamic change in high-protein soybean cultivar,the dynamic change of nitrogen accumulation,distribution and translocation and its effects on protein content in seeds were analyzed.Two high-protein and one common soybean varieties with similar yield were chosen as test materials and the nitrogen content in different organ after branching were determined and calculated.The results showed that the nitrogen content in 3 cultivars was similar before podding.After podding,the nitrogen content of all vegetative organs(leaf,stem and petiole)of high-protein cultivars,except that of petiole in the 7th week,were higher than those of normal cultivar.Therefore,the higher nitrogen content and maintaining for a long time in the vegetative organs were beneficial to nitrogen accumulation of seeds.On the contrary,nitrogen content in pod shell(with the exception of mature stage)of high-protein soybean was lower,which suggested most nitrogen in vegetative organs were translocated to seed in high-protein soybeans.During seed formation,translocated N contributed more to seed protein content for high-protein soybean.At maturity,the high-protein cultivars still could uptake more nitrogen than normal cultivar and the nitrogen content in all organs were higher than those of normal cultivar,which is favorable to the comprehensive utilization on both seeds and straw of high-protein soybean cultivars.