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2014~2015年以粤甜16、粤甜22、新美夏珍为材料,在春、夏、秋播期大田种植,利用Logistic方程比较不同播期子粒灌浆过程,探索南方鲜食玉米区播期对甜玉米子粒灌浆和产量的影响。结果表明,播期显著影响甜玉米鲜穗产量、穗粒数和千粒重,从夏播、春播到秋播,随着抽丝至成熟期日均温渐降,到达最大灌浆速率的天数(Tmax)延长,活跃灌浆期(P)增加,达到最大灌浆速率时的生长量(Wmax)增大,导致粒重、穗粒数和产量增加。甜玉米在南方鲜食玉米区的适宜播期依次为秋播、春播、夏播。品种决定粒重与灌浆参数的关系,同一品种的粒重与Wmax极显著正相关,品种间的粒重差异由P决定。根据播期选择适宜品种,延长P,提高子粒Wmax,是甜玉米周年生产中高产稳产的重要途径。
In the field of spring sweet summer, summer sowing and autumn sowing, Yuetian 16, Yuetian 22 and Xinmeizhenzhen were planted in the field from 2014 to 2015. Logistic equation was used to compare the grain filling process at different sowing dates to explore the sowing date Effect of sweet corn grain filling and yield. The results showed that sowing date significantly affected the fresh ear production, grain number per spike and 1000-grain weight of sweet corn. From summer sowing and spring sowing to autumn sowing, with the daily average temperature decreasing gradually from spinning to maturity, the maximum number of days (Tmax) , The active grain filling stage (P) increased, the maximum grain growth rate (Wmax) increased, resulting in increased grain weight, grains per spike and yield. Sweet corn in the south of fresh corn area suitable sowing were autumn sowing, spring sowing, summer sowing. Variety of grain weight and grain filling parameters to determine the relationship between the same variety of grain weight and Wmax extremely significant positive correlation between varieties of grain weight difference determined by P. According to sowing date to select the appropriate varieties to extend the P, increase grain Wmax, sweet corn annual production is an important way to high and stable yield.