紧凑型玉米高产示范与配套栽培技术研究

本文以紧凑型品种掖单13号和平展型品种丹王13号为材料．进行为期两年高产示范试验。结时表明：在相同栽培条件下，每公顷为45000株、52500株、60000株、67500株、75000株，掖单13比丹玉13分别增产12.69%、20.36%、22.51%、26.02%、45.21%；单株生产力增加17.49g、25.44g、29.20g、32.08g、44.21g；穗粒重增加37.80g、44.90g、30.60g、38.90g、57.60g；穗粒数增加65粒、95粒、76粒、82粒、160粒；空秆率减少11.7、12.5、13.8、15.3、16.4个百分点，充分显示了紧凑型玉米的耐密性能．同时，还示范并改进了紧凑型玉米的配套栽培技术．

Studies on the High-yield Model and Combined Cultur al Practices of Upright-leaf Corn

The high-yield model and experiment were made with the materials of upright-leaf variety Yedan No. 13 and patulous variety Danyu No. 13 for 2 years. The Results indicated under the same cultural condition, when the plants per ha were 45000,52500, 60000, 67500, 75000 respectively, the yield of variety Yedan No. 13 in comparisonwith variety Danyu No. 13 increased by 12. 69%, 20.36%, 22.51 %, 26.02%, 45.21%respectively. Productivity per plant increased by 17.49g, 25.44g, 29. 20g, 32.08g, 44.21g respectively. Grain weight per ear increased by 37.80g, 44. 90g, 30.60g. 38.90g, 57.60g respectively. Grain numbers per ear increased by 65.95, 76, 82, 160 respectively. The rate of empty straw re,luced 11.7%, 12.5%, 13.8%, 15.3%, 16.4%. The dense-resistance of upright-leaf corn was showed fully. Farthermore, the model was made and the combined cultural practices were improved.