锌、铁微肥对夏玉米产量和品质的影响
Effect of Zinc and Iron Fertilizers on Yield and Quality of Summer Maize

适量、适度的锌、铁微肥有利于促进作物生长、提高作物产量和品质。为满足夏玉米对锌、铁微肥的需求，提高其产量和品质，以‘陕单609’为材料，以3种锌、铁微肥施用量为主区，3种锌、铁微肥质量比为副区，研究锌、铁微肥对夏玉米干物质积累及产量和品质的影响。结果表明：（1）锌、铁微肥的最佳施用量和Zn、Fe质量比例分别为2.0 kg/667m、2∶3，在此施用量和质量比例下生殖器官干物质积累的协同作用最大；（2）锌、铁微肥的配施显著增加穗长、穗粗、穗粒数以及提高产量，明显降低秃尖长，但对百粒质量无显著影响；（3）锌、铁微肥的配施有利于提高籽粒中粗纤维的质量分数，对籽粒中粗脂肪无显著影响，而降低籽粒中粗蛋白的质量分数。
Moderate and appropriate zinc and iron fertilizers can promote crop growth and increase crop yield and quality.In order to meet the demand of zinc and iron fertilizer in summer maize ,and increase its yield and quality,we took maize ‘Shaandan 609’ as material to explore effects of iron and zinc fertilizers on yield of summer maize ,quality and dry matter accumulation with 3 kinds of fertilizers mass concentration as the main plot and 3 kinds of zinc and iron mass proportion as subplot,the results showed that，(1) 2.0 kg/667m,m(Zn)∶m(Fe)=2∶3 were the best mass concentration and mass proportion of zinc and iron fertilizers,in which the synergistic effect on dry matter accumulation of reproductive organ was maximum;(2)spike length,spike width,grain number and yield increased significantly under treatments of zinc and iron fertilizers,while the bald length decreased; no significant effect on the 100 grain mass was found;(3)zinc and iron fertilizer could improve the mass fraction of crude fiber in grains,there was no significant effect on crude fat in grains,and it caused the inhibition of crude protein mass fraction in grains.