| 大豆植株苗期至结荚初期对肥料氮的吸收与分配 |
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| 引用本文： | 金喜军,龚振平,马春梅,姚玉波,邸伟.大豆植株苗期至结荚初期对肥料氮的吸收与分配[J].核农学报,2012,26(5):809-814,837. |
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| 作者姓名： | 金喜军 龚振平 马春梅 姚玉波 邸伟 |
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| 作者单位： | 1. 东北农业大学农学院,黑龙江哈尔滨150030 黑龙江八一农垦大学植物科技学院,黑龙江大庆163319
2. 东北农业大学农学院,黑龙江哈尔滨,150030 |
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| 基金项目： | 国家科技支撑计划课题，黑龙江省科技计划项目 |
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| 摘 要： | 采用砂培与15N分阶段标记的方法,研究了苗期至结荚初期大豆植株对氮素的同化吸收,尤其是肥料氮在不同器官和节中的积累与分配。结果表明:(1)苗期至结荚初期大豆植株氮素积累量逐渐增加,由标记试验Ⅰ的64.08g/plant逐渐增加到标记试验Ⅴ的307.17mg/plant;(2)不同器官中肥料氮积累存在差异,叶是苗期至结荚初期肥料氮积累的主要器官,所占比例为55.2%,根系次之为25.9%,茎最小为18.9%;(3)苗期至结荚初期肥料氮积累量和所占比例逐渐减小,而根瘤固氮则逐渐增加,其中苗期至盛花期肥料氮是大豆植株氮素主要来源,盛花期以后以根瘤固氮为主;(4)不同成长程度叶对肥料氮的积累存在差异,表现为成长中叶>新生叶>成熟叶;(5)新生茎叶氮素构成随全株氮素构成的变化而变化,苗期至初花期以肥料氮为主,初花期至结荚初期根瘤固氮逐渐转为主体。
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| 关 键 词： | 大豆 苗期 结荚初期 肥料氮 根瘤氮 |
FERTILIZER N ABSORPTION AND DISTRIBUTION BY SOYBEAN FROM SEEDLING TO POD BEGINNING |
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| JIN Xi-jun,GONG Zhen-ping,MA Chun-mei,YAO Yu-bo,DI Wei.FERTILIZER N ABSORPTION AND DISTRIBUTION BY SOYBEAN FROM SEEDLING TO POD BEGINNING[J].Acta Agriculturae Nucleatae Sinica,2012,26(5):809-814,837. |
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| Authors: | JIN Xi-jun GONG Zhen-ping MA Chun-mei YAO Yu-bo DI Wei |
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| Institution: | 1(1.Agronomy College,Northeast Agriculture University,Harbin,Heilongjiang 150030; 2.Heilongjiang August Frist Land Reclamation University,Daqing,Heilongjiang 163319) |
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| Abstract: | The nitrogen assimilation and absorption by the soybean plant,especially the distribution of fertilizer N among different organs and nodes were studied during the period from seedling to pod beginning by using sand culture and staged 15N labeling method.Results were as follows:(1) total nitrogen accumulation during the five labeling experiments increased from 64.08mg/plant in labeling experimentⅠto 307.17mg/plant in labeling experiment Ⅴ.(2) Fertilizer N accumulation in different organs exhibited different proportions during the period from seedling to pod beginning,with the highest in leaves(55.2%),25.9% in roots and 18.9% in stems.(3) The accumulation and proportion of nodulations N increased gradually during the period from seedling to beginning,however for fertilizer N it was contrary,the soybean plant depended mainly on fertilizer-N before full bloom and then nodulations N during the period from full bloom to pod beginning.(4) Fertilizer N accumulation in leaves at different growing stages followed the order of growing leaves>newborn leaves>mature leaves.(5)Nitrogen composition of newborn leaves changed with that in total plant: fertilizer N was the primary nitrogen source from seedling to bloom beginning,and nodulations N was the primary nitrogen source from bloom beginning to pod beginning |
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| Keywords: | soybean seedling period beginning pod fertilizer N nodulation N |
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