聚天门冬氨酸螯合氮肥减量基施对东北春玉米的增效机制

唐会会,许艳丽,王庆燕,马正波,李光彦,董会,董志强

Increasing spring maize yield by basic application of PASP chelating nitrogen fertilizer in northeast China

Hui-Hui TANG,Yan-Li XU,Qing-Yan WANG,Zheng-Bo MA,Guang-Yan LI,Hui DONG,Zhi-Qiang DONG

图1 CN与PASP-N处理不同施肥量对玉米产量的影响 A: 2016年产量; B: 2017年产量。CK: 对照; CN: 常规肥; PASP-N: PASP螯合氮肥; CN1、CN2和CN3分别代表施氮量为112.5 kg hm-2、225.0 kg hm-2和337.5 kg hm-2; PASP-N1、PASP-N2和PASP-N3分别代表施氮量为75.0 kg hm-2、150.0 kg hm-2和225.0 kg hm-2。图中标以不同小写字母的柱值在0.05水平上差异显著。

Fig. 1 Effects of CN and PASP-N treatments on maize yield A: yield in 2016; B: yield in 2017. CK: control; CN: conventional N fertilizer; PASP-N: N fertilizer coupled with PASP; CN1, CN2, and CN3 denote the N application rate of 112.5 kg hm-2, 225.0 kg hm-2and 337.5 kg hm-2 respectively; PASP-N1, PASP-N2, and PASP-N3 denote the N application rate of 75.0 kg hm-2, 150.0 kg hm-2, and 225.0 kg hm-2, respectively. Value within a column yellowed by different letters are significantly different at P < 0.05.