Abstract: The author proposed a one narrow, two high, and three late cultivation approach for high-yield of summer corn, and conducted related study based on the characteristics of solar energy and heat in Hebei middlesouthern summer corn region. The 'one narrow' means to reduce row spacing; the 'two high' means that the corn hybrid used is tolerant high planting density and high harvest index; the 'three late' means late thinning out of seedling to reach good plant uniformity, late fertilizer top-dressing to improve kernel number per ear and grain weight, and late harvest to achieve maximum kernel plumpness. The result showed that a combination of techniques of the hybrid used better in tolerance to high planting density and harvest index over 0.53, row spacing kept around 50 cm for high density, seedling thinning at 5 -6 leaf stage, and nitrogen fertilizer used 70% of total as basal use and 30% as top-dressing at 13 -14 fully-expanded leaf stage for normal nitrogen quota could obtained high yield. Late harvest is an effective practice for yield increase and the use efficiency of solar energy, heat, fertilizer and soil resources, for harvest delayed to early October could increase 5% -10% of yield.

Key words: Summer corn, Technique, Row spacing, Fertilizer use, Uniformity

CLC Number: 

• S513