施氮水平对高产夏玉米氮磷钾积累和产量形成特性的影响

杨梦雅，刘志鹏，陈　曦，肖　凯

Effects of the N level on accumulation of N, P, and K and yield formation in the high yield plants of summer maize

河北农业大学学报 . 2017, (6): 1 -8 . DOI: 10.13320 / j.cnki.jauh.2017.0117