3个不同株型鲜食糯玉米适宜密度试验

【目的】探讨3种不同株型鲜食糯玉米品种的适宜种植密度，为鲜食糯玉米的种植提供参考。【方法】采用双因素裂区设计，主处理设5个密度，副处理设3个品种，调查鲜食糯玉米生育期、株高、穗长和产量等性状。【结果】随着密度的增加，穗长、穗粗、行数、行粒数、千粒重逐渐减小，秃尖长、株高和穗位高逐渐增加，生育期略有延长。高秆大穗型品种京科糯2000种植密度为48000株/ha时产量最高，达12787.7 kg/ha；矮秆型品种都市丽人种植密度为60000株/ha时产量最高，达10473.0 kg/ha；紧凑型品种玉美头601种植密度为54000株/ha时产量最高，达12214.4 kg/ha。【结论】高秆大穗型品种京科糯2000、矮秆型品种都市丽人和紧凑型品种玉美头601的适宜种植密度分别为48000~54000、54000~60000和54000~60000株/ha。

Optimizing suitable planting density for three different plant types of fresh edible waxy corn

Objective]The present experiment was conducted to find out the optimum planting density for 3 different types of fresh edible waxy corn in order to optimize their production practices.Method]Two-factor split-plot design experiment was conducted to study the major agronomic characteristics,viz.,growth period,plant height,ear length and yield using five planting densities(42000,48000,54000,60000 and 66000 plants/ha) and three varieties(Jingkenuo 2000,Dushiliren and Yumeitou 601).Result]The results showed that ear length,ear diameter,rows per ear,kernels per row and 1000-kernel weight reduced gradually with increasing the planting density,while barren ear tip,plant height and ear height increased gradually,and growth period extended slightly.Three corn varieties,viz.,Jingkenuo 2000(high-stalk type maize),Dushiliren(dwarf type maize) and Yumeitou 601(compact type maize) recorded the highest yield as 12787.7,10473.0 and 12214.4 kg/ha when planted with 48000,60000 and 54000 plants/ha planting density,respectively.Conclusion]It was concluded that 48000-54000,54000-60000 and 54000-60000 plants/ha were suitable planting density for varieties Jingkenuo 2000,Dushiliren and Yumeitou 601,respectively.