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对棉花柱头外露 4个光敏种质的不同叶龄期幼苗进行 16h长日照处理。据观察结果表明 :在南昌地区夏播条件下 ,凡通过 1真叶期后的各叶龄期的自然光照 (13 .84h)处理 ,接着再给长日照 ,不能控制棉株现蕾的出现 ;只有在棉苗子叶期给予长日照 ,棉株才可能不现蕾。该类种质进行光照试验必须在 1真叶平展以前进行处理才能得到正确的结论。棉花柱头外露光敏种质感光敏感期为子叶期至 1真叶期
The different leaf age seedlings of 4 photosensitive germplasm exposed to stigma of cotton were subjected to 16-day long sunshine treatment. According to the observation results, under the condition of summer sowing in Nanchang, the emergence of cotton bolls could not be controlled by the natural light (13.84 hours) at each leaf stage after 1 true leaf stage and then to long sunshine. Only in the cotton seedling leaf given long sunshine, cotton plants may not bud. Such germplasm for light test must be processed before the true leaf flat to get the correct conclusion. Cotton stigma light sensitive germplasm sensitive period of cotyledon to 1 true leaf period