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为解决长江中下游地区双季机插晚稻移栽秧龄过长的问题,选取温光特性及熟期各不相同的4个代表性品种为材料,研究不同秧龄移栽对双季晚稻生长及产量的影响。结果表明,随着移栽秧龄的增大,感温性水稻穂、成熟期均明显推迟,而感光型水稻生育期受影响较小;感温性迟熟品种25 d、30 d移栽产量显著下降,而感温性中早熟及感光性迟熟品种至30 d移栽产量才发生显著下降。最佳移栽秧龄为感温性晚稻15 d左右,感光性晚稻20d左右。感温性品种作双季晚稻种植时应选用中早熟品种,而感光性品种可选用高产的中迟熟品种。
In order to solve the problem of late transplanting seedling age of double cropping rice in the middle and lower reaches of the Yangtze River, we selected four representative cultivars with different light and temperature characteristics and maturity as materials to study the effects of transplanting with different seedling age on the growth and yield of double cropping late rice Impact. The results showed that with the increase of transplanting seedling age, the temperature-sensitive rice 穂, mature stage were significantly delayed, while the sensitive rice growth stage affected less; late temperature sensitive varieties 25d, 30d transplanting yield significantly Decreased, while the yield of medium temperature prematurity and photoperiod maturity varieties did not significantly decrease until 30 d. The optimum transplanting seedling age was about 15 d for temperature sensitive late rice and about 20 d for late rice. Sensitive varieties for double season late rice planting should be used in the precocious varieties, and photosensitive varieties can choose high yield in the late maturing varieties.