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一、晚稻适于用短秧龄,要选育秧龄弹性强的品种。典型的晚稻品种要求一定的短光照才能抽穗,这难于适应我省复杂的生态环境,现晚稻品种除了闽南沿海平原有较大面积的种植外,其它稻区大部分种植杂交水稻。究其原因,常规晚稻都是些感光性的品种,对抽穗要求一定的短光照,生产上采用早熟的晚稻品种,虽然能安全齐穗,但产量稳而不高,如用中熟品种又感到生育期长些,超越了安全齐穗期,有一定的风险。 1968年我省大力推广双季稻,把原来种植单季稻的地方改为种植双季连作稻,短短几年间山区双季稻面积由200多万亩,一跃
First, late rice is suitable for short seedling age, to breed seedling age flexible varieties. Typical late rice varieties require a certain short light to heading, which is difficult to adapt to the complex ecological environment in our province, late rice varieties in addition to the coastal plains in southern Fujian have a larger area of cultivation, most other rice cultivation of hybrid rice. The reason, the conventional late rice are some of the photosensitive varieties of the heading requirements of a certain short light, the production of early maturing late rice varieties, although safe and efficient, but the output is stable and not high, as with medium varieties also feel Growth period longer, beyond the safe heading, there is a certain risk. In 1968, our province vigorously promoted double-cropping rice and changed the original place where single-cropping rice was planted into double-cropping continuous cropping rice. In a few short years, the area of double-cropped rice in mountainous areas has increased from over 2 million mu