内蒙古民族大学学报（自然科学版）2025，Vol.40Issue(4)：37-43,7.DOI:10.14045/j.cnki.15-1220.2025.04.006
氮肥与种植密度互作对高油大豆农艺和主要经济性状的影响
Effects of Nitrogen Fertilizer and Planting Density Interaction on Agronomy and Main Economic Traits of High-oil Soybean
摘要
Abstract
Using the high-oil soybean cultivar"Jiyu 407"as the experimental material,this study aimed to eluci-date the optimal planting density and nitrogen application rate by establishing different planting density and nitrogen fertilizer gradients.The experiment adopted a two-factor split-plot design,with nitrogen fertilizer gradients assigned to the main plots and planting densities to the subplots.Four nitrogen treatment levels were set:N1(0 kg/hm2),N2(75 kg/hm2),N3(150 kg/hm2),and N4(225 kg/hm2);meanwhile,three planting density gradients were estab-lished:M1(180 000 plants/hm2),M2(240 000 plants/hm2),and M3(300 000 plants/hm2).The effects of nitrogen fer-tilizer and planting density interaction on agronomic traits,quality characteristics and yield performance of high oil soybean were studied.The results demonstrated that increasing the planting density induced a significantly ascend-ing trend in plant height,with the maximum value observed in the N4M3 treatment and the minimum in the N1M1 treatment.Stem diameter exhibited a trend of first increasing and then decreasing with rising density,peaking in the N3M2 treatment and reaching the minimum in the N4M1 treatment.The influence of nitrogen application levels on plant height and stem diameter mirrored that of density.The maximum values of grains per plant,pods per plant,and grain weight per plant were all recorded in the N3M1 treatment,while the minimum values were found in the N2M2 treatment.The 100-seed weight under N1M1 and N2M3 treatments was significantly higher than that under N2M1,N2M2,and N3M1 treatments,but showed no significant difference from other treatments.Yield displayed no obvious regularity with density and nitrogen application levels,and there was no significant difference among each treatment.The crude protein content in the N1M1 treatment was significantly higher than that in other treatments,while the N2M3 treatment had the highest crude fat content.During the four samplings(A1-A4)from the pod-filling stage to before the full maturity stage,the number of root nodules showed a trend of first increasing and then decreasing,and the root nodule number of each treatment peaked at the A3 period.关键词
高油大豆/密度/氮肥梯度/农艺性状/产量/品质Key words
high-oil soybean/planting density/nitrogen fertilizer gradient/agronomic traits/yield/quality分类
农业科技引用本文复制引用
郭克轩,张春兰,刘鹏..氮肥与种植密度互作对高油大豆农艺和主要经济性状的影响[J].内蒙古民族大学学报（自然科学版）,2025,40(4):37-43,7.基金项目
农业生物育种国家科技重大专项(2023ZD04032) （2023ZD04032）
科尔沁沙地生态农业国家民委重点实验室开放基金项目(MDK2023101) （MDK2023101）
