玉米密植和营养改良之研究Ⅰ.密度对玉米产量和营养的效应

4个直立叶型杂交种、3个种植行距穴67cm等行条播、50cm等行条播、六角形穴播雪、3个密度穴6.0万株/hm2、7.5万株/hm2、9.0万株/hm2雪的田间试验结果表明:影响玉米产量潜力提高的主要因素是密度,其次为行距,再次为品种;在试验实施的密度、行距、品种各因素处理中,玉米杂交种产量均随密度的增大而增加,玉米营养面积随密度的增大而变小。

Study on Close Planting and Nutrient Improvement of Maize Ⅰ. Effect of Density to Yield and Nutrition of Maize

The result of field experiment with 4 leaf straight-up type maize hybrids,3 planting models (50 cm distance between rows,6-angle shape,67 cm distance between rows),3 densites (60 000 plants/ha,75 000 plants/ha,90 000 plants/ha) indicated:The first main factor which affect maize yield potential developing is density;The second is distance between rows;The third is variety under this experimental conditions;The yield of maize hybrids is increasing as density increasing,the maize nutrient area is decreasing as density increasing.