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甜菜的露地越冬留种,是我国良种殖育上多快好省的重要措施之一。我国中部地区黄淮流域和长江两岸在严冬季节除地表冻层超过1尺地区外,多数地区都可采用。实践证明在一定程度上秋种冬栽法比原地越冬采种法更为优越。在适宜地区实行南繁北用则
It is one of the most important measures to improve the quality of breeding of breeding seeds in our country. Huanghe-Huai River basin in central China and the two sides of the Yangtze River in the winter season in addition to more than 1 foot surface freezing area, the majority of areas can be used. Practice shows that to some extent autumn planting winter than the original overwintering mining method is more superior. In the appropriate area to implement the South Fan north then