【摘要】 本研究以甜玉米品种脆王和米哥为试材，设置52 500株/hm2(D1)、60 000株/hm2(CK)、67 500株/hm2(D2)和75 000株/hm2(D3)4个种植密度，测定不同生长期叶面积、光合速率、产量、粗蛋白含量和还原糖含量等指标以探究适宜密植模式。结果表明，单叶面积和叶面积均受种植密度、品种及其相互作用的影响。相比脆王，米哥在较高种植密度下单株叶面积显著降低。种植密度显著影响群体叶面积和净光合速率，品种间差异不显著。米哥的群体叶面积在D3种植密度下比D2低9.47%，两种玉米净光合速率均随着种植密度的增加而降低。种植密度和品种对产量构成均有显著影响。高密度增加了两种玉米空秆率、秃尖长，降低穗长、穗粗和百粒重，甜玉米产量随着种植密度的增加先上升后下降，在D2密度条件下达到峰值。此外，两种甜玉米的粗蛋白和还原糖含量随着种植密度的增加先上升后下降。黑龙江嫩江地区种植脆王和米哥甜玉米适合选择67 500株/hm2的种植密度以获得较好的产量和品质。更多还原

【Abstract】 This study used sweet corn varieties Cuiwang and Damigo as experimental materials, and four planting densities were set up with 52 500 plants/ha(D1), 60 000 plants/ha(CK), 67 500 plants/ha(D2), and 75 000 plants/ha(D3). Meanwhile, the leaf area, photosynthetic rate, yield, crude protein content and reducing sugar content at different growth stages were measured to explore suitable planting patterns. The results indicated that both individual leaf area and leaf area index(LAI) were influenced by planting density, variety, and their interactions. Leaf area per plant of Damigo significantly decreased at higher densities compared to Cuiwang. Population leaf area and net photosynthetic rate(Pn) were notably affected by planting density but not by varieties. D3 reduced population leaf area by9.47% and Pndeclined with increasing density in Damigo compared to D2. The yield components were significantly influenced by both planting density and variety. Higher densities increased barren stalk rates and bare tip lengths in sweet corn, while reducing ear length, ear thickness, and 100-grain weight. The yield of sweet corn showed increasing first and then decreasing with increasing planting density, and D2 showed the highest yield. Meanwhile, the crude protein and reducing sugar content in two types of sweet corn also showed increasing first and then decreased with the increase of planting density. Therefore, the planting density of 67 500 plants/ha(D2) was found to be optimal for both Cuiwang and Damigoo in the Nenjiang area of Heilongjiang Province.更多还原