氮钾配比对寒地玉米干物质积累、产量及品质的影响

Effect of Ratios of Nitrogen to Potassium on Dry Matter Accumulation,Yield and Quality of Corn in Cold Area

通过田间小区试验,研究不同氮钾配比对玉米不同生育期和不同器官的干物质积累、分配、运转和产量及对品质的影响。结果表明,施氮量为150 kg/hm2、施钾量为100 kg/hm2的处理在成熟期茎、叶、穗干物质量、阶段子粒干物质积累量、茎部转运量、转运率、贡献率以及玉米子粒产量、子粒蛋白质与淀粉含量均高于其他处理。因此,氮、钾肥施用量为150 kg/hm2和100 kg/hm2有利于寒地玉米的干物质积累、产量及其品质的提高。

Effects of different ratios of N to K on dry matter accumulation, distribution, transportauon, yield and quality of corn in cold area were studied by using field plot trial. The results showed that at mature stage, for the N2K2 （N 150 kg/ha ＋ K20 100 kg/ha） treatment, dry matter accumulation of stems, leaves, spike, grain, translocation amount, efficiency and contribution rate of stems were all higher than that of other treatments. Yield, protein and starch contents in N2K2 treatment were also improved. Therefore, N and K ratio of 150 kg/ha, 100 kg/ha was con- ducive to increase dry matter accumulation, yield and quality of corn in cold area.