通过田间试验,建立了黑土区大豆-春玉米轮作条件下春玉米的肥料效应函数,得到该条件下春玉米的最大利润产量为11408.7 kg hm-2,氮、磷、钾肥料的推荐施肥量分别为N 167.0 kg hm-2、P2O5 45.0 kg hm-2、K2O 37.5 kg hm-2,N∶P2O5∶K2O=1∶0.27∶0.22。结果还表明,氮肥对玉米的增产作用远大于磷钾肥。该试验结果可以为东北黑土区大豆-春玉米轮作条件下春玉米的平衡施肥提供参考依据。
[Objective] To study the effects of Zinc on the yield,nitrogen/phosphorus/potassium/Zinc uptake and distribution of different genotypes of maize.[Method] Using two different genotypes of maize as materials,the effects of Zn on the yield,N/P/K /Zn uptake and distribution of different genotypes of maize were studied by pot cultivation.[Result] Appropriate Zn supply could improve the grain number per kernel.The Zn content in different organs of maize showed little difference under low Zn treatment （Zn0,Zn1）.With the increase of Zn supply,Zn content in leaf,stem and sheath rapidly increased,but the increasing amplitude of Zn content in the kernel and bract were less.The excessive Zn in maize was mainly translocated in lower organs to reduce the damage of them to plants.Different Zn supply levels had less effects on the absorption and translocation of N,P and K in low-Zn insensitive variety Mudan 9.While the absorption and translation of N,P,K in low Zn sensitive variety （Sidan 19） was more easily influenced by the amount of Zn supplied.[Conclusion] Appropriate Zn supply could enhance the maize yield and utilization rate of N and K,and reduce the absorption and utilization of P.
