如何防止低温引起的父本死苗杂交水稻制种的前提是保证种子质量，因此必须成片集中，严格隔离，适当提前父本播期（与中稻相比）．以利抽穗扬花天气好，异交结实率高和收贮天气好，不致出现种子穗萌。这样父本一般在３月初或上旬就播种了，秧苗下田后往往会遇上低温天气，... How to Prevent Cryogenic Paternity Death Vaccine hybrid rice seed production is based on the premise of ensuring the quality of seeds, it must be concentrated into pieces, strict isolation, appropriate parent sowing date (compared with medium). Eli blossoming weather is good, the rate of outcrossing high seed storage and weather is good, will not appear spike Meng seed. So the male parent usually sowed in early March or early, after the seedling often encounter low temperature weather, ...