TY - Acta Agronomica Sinica A1 - LÜ Li-Hua;TAO Hong-Bin;WANG Pu;LIU Ming;ZHAO Ming;WANG Run-Zheng T1 - Carbon and Nitrogen Metabolism and Nitrogen Use Efficiency in Summer Maize under Different Planting Densities Y1 - 2008-04-12 JF - Acta Agronomica Sinica JO - Acta Agronomica Sinica SP - 718 EP - 723 VL - 34 IS - 04 UR - https://zwxb.chinacrops.org N1 - 10.3724/SP.J.1006.2008.00718 ER -