TY - Acta Agronomica Sinica A1 - BAI Wei, ZHANG Li-Zhen, PANG Huan-Cheng, SUN Zhan-Xiang, NIU Shi-Wei, CAI Qian,AN Jing-Wen T1 - Effects of Straw Returning Combined with Nitrogen Fertilizer on Photosynthetic Performance and Yield of Spring Maize in Northeast China Y1 - 2017-12-12 JF - Acta Agronomica Sinica JO - Acta Agronomica Sinica SP - 1845 EP - 1855 VL - 43 IS - 12 UR - https://zwxb.chinacrops.org N1 - 10.3724/SP.J.1006.2017.01845 ER -