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玉米穗期是指拔节到抽雄一段时间,又称中期或拔节孕穗期。玉米的穗期因品种与播期不同约需时22—30天左右。生产上鉴别穗期的开始——拔节,应是植株上的光叶已基本全展,毛叶尚未展开,茎杆基部变园,手摸感到有节之时。玉米穗期为营养生长与生殖生长重叠进行的时期,对环境条件反应相当敏感。据观测:此期末植株的体积约比前期增大10倍左右,叶面积扩大5—7倍,干物质积累约增
Corn spike refers to the jointing to tasseling for some time, also known as mid-term or jointing booting stage. Corn ear because of different varieties and sowing about takes about 22-30 days. Identification of the beginning of the production of spike - jointing, it should be the light leaves on the plant has been basically the whole exhibition, the leaves have not yet started, the base of the stalks change Park, hand feel feel when the festival. The ear stage of maize is a period in which vegetative and reproductive growth overlap, and is quite sensitive to environmental conditions. It is observed: the end of the plant volume increased about 10 times the previous period, the leaf area increased 5-7 times the dry matter accumulation of about