摘要
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水平有利于籽粒氮素的积累;而荚皮氮素含量除成熟期外均低于普通大豆,说明高蛋白大豆籽粒对氮素的利用效率更高;籽粒形成及成熟期,蛋白质含量越高的品种吸收和运转的氮素越多,运转氮素对籽粒的贡献比例越大。成熟期高蛋白大豆依然比普通大豆吸收更多的氮素,且成熟期各个器官氮素含量均比普通大豆高,这有利于高蛋白大豆品种籽粒蛋白的加工利用和秸秆饲用及还田等方面的综合利用。
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.
出处
《大豆科学》
CAS
CSCD
北大核心
2012年第1期76-80,共5页
Soybean Science
基金
农业部公益性行业(农业)科研专项(200903002)
福建省农业科技重大专项项目[2008NZ0002-1(3)]
福建省科技厅公益类科研院所专项(2011R1028-3)
福建省财政专项资助项目(STIF-Y04)
关键词
高蛋白
大豆
氮素
积累与分配
High protein
Soybean
Nitrogen
Accumulation and distribution
