CAJ | 학술논문

为了挖掘玉米栽培品种的产量潜力，从而筛选出适合大庆地区种植的早熟玉米品种的适宜种植密度。采用二因素裂区试验，选用克单14、克玉15、庆1337和庆1448四个玉米早熟杂交种，设置5．0万、7．5万、10．0万、12．5万和15．0万株?hm‐2五个种植密度，分析不同种植密度对各品种产量和穗部性状的影响。结果表明：产量受种植密度影响较大，适当提高种植密度可以显著提高玉米产量，参试品种最适种植密度在10．0万～12．5万株?hm‐2；密度对穗部性状的影响在不同参试品种间表现趋势相近，千粒重、穗长和穗粗基本都随种植密度增大而显著减小，秃尖长度（除克单14外）均随种植密度增大而增大。
위료알굴옥미재배품충적산량잠력，종이사선출괄합대경지구충식적조숙옥미품충적괄의충식밀도。채용이인소렬구시험，선용극단14、극옥15、경1337화경1448사개옥미조숙잡교충，설치5．0만、7．5만、10．0만、12．5만화15．0만주?hm‐2오개충식밀도，분석불동충식밀도대각품충산량화수부성상적영향。결과표명：산량수충식밀도영향교대，괄당제고충식밀도가이현저제고옥미산량，삼시품충최괄충식밀도재10．0만～12．5만주?hm‐2；밀도대수부성상적영향재불동삼시품충간표현추세상근，천립중、수장화수조기본도수충식밀도증대이현저감소，독첨장도（제극단14외）균수충식밀도증대이증대。
In order to excavate maize varieties yield potential ,to screen rational planting density of early maturity maize varieties in Daqing areas .The early maturity maize hybrids Kedan14 ,Keyu15 ,Qing1337 and Qing1448 were tested for different planting densities .Five planting densities for these varieties were tested ,they were 50 000 ,75 000 ,100 000 and 125 000 and 150 000 plants?hm‐2 .The results showed that yield might be increased obviously if planting density be increased suitably .Every variety had the most suitable density .The yields of tested maize hybrids were the highest in 100 000 and 125 000 plants?hm‐2 density ;The effects of planting den‐sity on ear traits of different density‐tolerant varieties were the same roughly .The 1 000‐kernel weight ,ear length and ear diameter of four varieties increased with planting density increasing .The bald length (in addition to Kedan14) reduced with planting density increasing .