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1960年,天台县綠肥田早稻的秧田,在2月24日开始播种,3-15日盛播,3月28日前后基本結束。在育秧期間,共发生三次烂秧。第一次开始于3月上旬,盛期在3月中、下旬,3月底基本停止;第二次4月2日开始,4月5-6日普遍发生,4月8-9日緩和下去;第三次在4月20日开始,4月22-24日盛发,4月26日前后停止发展。其中以第一、第二兩次較为普遍而严重,第三次只是局部发生而且較輕。根据調查,因育秧技术及采用品种的不同,烂秧損失情况很不一致。严重的烂秧率可以超过60％,輕的可降低至5％以下或者不发生烂秧。为了使今后生产上免受烂秧带来的損失,調查总結这些經驗和敎訓并用之于生产是非常必要的。一、烂秧症状和变化我县烂秧症状有三种: 一种是在早稻催芽播种后4-5天,谷粒表面从
In 1960, the seedling fields of early fertilizers of Tiantai Green Fertilizer started sowing on February 24 and sowing on March 15 and ended basically on or about March 28. During the nursery, a total of three rotten seedlings. The first began in early March, the peak in mid-March, late, basically stopped by the end of March; the second April 2, April 5-6 generally occur April 8-9 easing down; The third one started on April 20, peaked on April 22-24, and ceased on April 26. Among them, the first and second are more common and serious, the third is only partial and lighter. According to the survey, due to different seedling raising techniques and varieties, the situation of rotten seedlings is very inconsistent. Severe rotten seedling rate can exceed 60%, light can be reduced to less than 5% or does not occur rotten seedling. In order to prevent future losses from rotting seedlings, it is necessary to investigate and summarize these experiences and practices. First, the symptoms and changes of rotten seedlings There are three symptoms of my county rotten seedlings: one is germinated in early rice 4-5 days after sowing, grain surface from