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3 CN与PASP-N处理不同施肥量对玉米叶面积指数的影响 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; V6: 拔节期; V12; 大口期; VT: 花期; VT+15: 花后15 d; VT+30: 花后30 d; VT+45: 花后45 d; R6: 收获期。

Fig. 3 Effects of CN and PASP-N treatments on maize leaf area index 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-2, and 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; V6: elongation period; V12: flare opening period; VT: anthesis; VT+15: 15 days after anthesis; VT+30: 30 days after anthesis; VT+45: 45 days after anthesis; R6: harvest period.