1954年,作者因研究连作晚稻提早成熟问题,作水稻春化试验;根据试验结果:晚稻种子经过春化处理后,生长期可以缩短,在连作时延迟播种,但不延迟成熟(与间作晚稻收获期很接近),且有可能提高产量的趋势;兹将试验情形及结果叙述于后。一.春化的方法开始春化时,先用水将种子浸胀,浸水时间约二天,每天换水二次;次用布包裹,每日分上、下午二次解开布包检视,并用温水洗过,以保持布包种子内有足够的空气,水分与温度,约经二日,种子中已有少量萌动,其胚根突破种皮,约占全数2—3％,其余各种子,胚部都已肿胀;乃将布包打开,在通风房内铺成一薄层;二、三日后,种子肿胀的胚部,已不复见,为防止种子过分干燥影响生活力起见,将种子堆积约半寸厚,但每日分上、下午二次 In 1954, the author studied the vernalization of late rice in continuous cropping due to the problem of early maturation of late rice. According to the results of the experiment, the late growth of late rice could be shortened after sowing and delayed sowing in continuous cropping but without delayed maturity Period is very close), and there is a possibility that it will increase the yield. The experimental results and the results will be described later. First, the method of vernalization vernalization, the first water will be inflated seeds, water immersion time of about two days, changing the water twice a day; times with cloth wrapped, daily points on the afternoon of the second release untied cloth view, and with warm water Washed in order to maintain adequate seeds in the cloth air, water and temperature, after about two days, the seeds have a small amount of germination, the radicle breakthrough seed coat, accounting for about 2-3% of the whole, the rest of the seeds, Embryos have been swollen; the cloth is opened, paved in a ventilated room in a thin layer; two or three days after the seed swollen embryos, no longer see, in order to prevent excessive drying seeds affect the viability of the seed accumulation About half an inch thick, but the daily points, the afternoon twice