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我省二晚产量长期低而不稳,除由于季节紧、肥料差、病虫多外,还有一个重要原因,就是品种严重混杂退化。从某种意义上讲,这是连年用二晚本身繁殖种子带来的弊病,所以必须改二晚留种为一晚留种。这是当前晚稻种子生产上一个需要引起高度重视的问题。
Two nights production in our province is low and unstable for a long time. Apart from the tight seasons, poor fertilizer and pests, there is another important reason for the serious hybrid degeneration. In a sense, this is the shortcoming of breeding two seasons with two nights in a row, so it is necessary to change the species for two nights to stay for one night. This is the last issue that needs to be given high priority in late rice seed production.