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《Plant Nutrition and Fertilizer Science》 2011-04
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Effects of nitrogen levels on nodule growth of soybean using ~(15)N tracing method

DONG Shou-kun,LIU Li-jun,SUN Cong-shu,ZHANG Bing,MA Xiu-feng,JIAO Guang-chun,MA Chun-mei,GONG Zhen-ping(Agronomy College,Northeast Agricultural University,Harbin 150030,China)  
In order to definite the effects of soybean nodules growth,15N tracing and sand culture were used to study the effects of nitrogen nutrition levels on nodule growth and nodule nitrogen fixation of soybean cultivar,Dongnong 47(DN 47).The results show that the dry weights of nodules are increased earlier and decreased later when the exogenous-N levels are gradually increased,and the dry weight of nodules is maximum when the nitrogen concentration is 50 mg/L.Nodules growth needs "startup-N",and the best effect of the "startup-N" on nodule growth is before the third compound leaf expanded(V3) period.Growth of nodules is inhibited while applying exogenous-N from the full pod to beginning seed(R4-R5).There are significant correlations between dry weight of nodules,N-accumulation of nodules,N ratio in nodules and N-accumulation in plants.
【Fund】: 黑龙江省科技攻关计划(GA09B103 GA09B104);; 黑龙江省教育厅科研项目(10531010);; 东北农业大学博士启动基金资助
【CateGory Index】: S565.1
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