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供试品种为农垦58和宜粳一号,播种期分别为6月6日和6月21日,于抽穗后每品种固定5个主穗,详细记载见观察结果。观察结果:(一)开花所需天数及每天花数两品种从稻穗露出剑叶叶鞘三分之一左右时即开始开花。在1974年的气候和栽培条件下,一穗从开始开花到全穗开花完毕需5—7天,各日的开花数因品种不同而有差异(表一)。
The tested cultivars were Nongken 58 and Yijing 1, and the sowing dates were June 6 and June 21, respectively. Five main spikes were fixed for each variety after heading. The detailed records are given in the observation results. Observations: (a) the number of days required for flowering and the number of flowers per day two varieties of rice leaves from the opening of the leaf sheath about one-third that began to flowering. Under the climatic and cultural conditions of 1974, it takes 5-7 days to complete the flowering of a spikelet from the beginning of the spike to the whole spike. The number of blossoming on each day varies according to the variety (Table 1).