甜玉米营养品质动态及其适宜收获期的确定

2006年4—9月在内蒙古民族大学试验农场进行了甜玉米的播期试验．结果表明，随着采收期的后延，春早播、春晚播和夏早播的甜玉米单穗鲜重均呈持续增加的趋势；胚面厚度在50％吐丝后28d达到最大值，之后略有下降；籽粒含水量呈下降的趋势；可溶性糖含量在50％吐丝期后的第22d达到最大值后不断下降．由含水量和可溶性糖含量共同确定的采收期为：春早播50％吐丝后21．6—25．3d；春晚播50％吐丝后20．5—24．9d；夏早播50％吐丝后20．8—23．0d．

The Determination of Sweet Corn Nutrition Quality Dynamics and Optimum Harvest Time

The experiment for sowing time of sweet corn were carded on the experimental farm of Inner Mongolia University for Nationalities from April to September in 2006. The results showed that： with the delay of harvest period, the weight of per spike of sweet corn sowing early in spring,sowing late in spring and sowing early in summer increased continuously; twenty- eight days after 50 % spinning, the thickness of embryo surface reached maximum and decreased a little later; the grain water content decreased; twenty- two days after 50 96 spinning, the soluble suger content reached maximum and then decreased continuously. The harvest period determined by the content of water and soluble suger are sowing early in spring ：21.6 - 25.3 days after 50% spinning; sowing late in spring： 20.5 -24.9 days after 50 % spinning; sowing early in summer： 20.8 - 23.0 days after 50 % spinning.