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杂交水稻秋季制种采用当年春繁的不育系时,常因不育系种子发芽势差、发芽率低,呈现出苗参差不齐,成苗率低,致使秧苗不足,盛花期不集中,影响异交结实。为了打破不育系的休眠期,福建省永安县和三明市农业局,从1978年开始先后进行了硝酸液浸种处理不育系种子的试验,并经大面积制种实践,取得较好效果。此法目前已在三明地区各县推广应用。我们用0.1％、0.2％、0.3％、0.4％、0.5％、0.6％和0.8％等不同浓度硝酸溶液,浸威41、威20、珍汕97和四汕等不育系的种子,浸种时间为36或48或60小时。其结果是:(1)春繁的威41不育系处理效果较明显,其发芽率比未处理的提高5—63％,发芽势提高1.5—37.5％。其中以0.6％浓度药液处理的效果最好,发芽率
Hybrid rice autumn seedlings with spring and spring when the use of sterile lines, often due to poor seed germination potential of germination, germination rate is low, showing uneven seedlings, seedling rate is low, resulting in insufficient seedlings, florescence is not concentrated, the impact of differences Hand in hand. In order to break the dormancy period of sterile lines, Yong’an County, Fujian Province and Sanming City Bureau of Agriculture, since 1978, has been nitric acid seed soaking seed treatment test, and the practice of large-scale seed production, and achieved good results. This method has been popularized and applied in counties in Sanming. We used 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6% and 0.8% of different concentrations of nitric acid solution, Wei Wei 41, Viagra 20, Zhenshan 97 and SiShan other sterile lines, soaking time 36 or 48 or 60 hours. The results were as follows: (1) The treatment effect of Spring Fanwei 41 was more obvious, the germination rate was increased by 5-63% and the germination potential increased by 1.5-37.5% compared with untreated. Among them, the treatment with 0.6% strength liquid solution has the best effect and the germination rate