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为了研究夏玉米穗分化与外部形态的关系,并据此进行科学的田间管理,以充分发挥夏玉米的增产潜力,一九七八年我们在本院试验场,对当前生产上推广的“京早7号”、“京黄113”和“京白107”的穗分化过程及其与外部形态的关系,进行了初步的探索性观察。三个品种总叶片数及生育期彼此不同。试验地为壤土,地力较好,上茬小麦收获后浇底墒水并旋耕一次于六月二十四日播种,七月上旬定苗后,于五片可见叶选有代表性的、生长整齐一致
In order to study the relationship between summer maize spike differentiation and external morphology and to conduct scientific field management accordingly, in order to give full play to the yield potential of summer maize, in 1978, at our laboratory site, Early 7 “,” Jinghuang 113 “and” Jingbai 107 "and their relationship with the external morphology, we conducted a preliminary exploratory observation. The three varieties of the total number of leaves and growth period are different from each other. The test ground was loam soil with good soil fertility. After harvesting, the groundwater was rinsed with water at the end of the previous harvest and rotary tillage was sown on June 24. After the seedlings were planted in early July, the five visible leaf selections were well-proportioned