滇型杂交早粳稻在湘南的示范推广

Demonstrate Study on Dian-type Hybrid Early Japonica Rice in Southern Hunan

以杂交早籼稻品种金优402为对照,对从云南引进的18个滇型杂交早粳稻新组合进行了比较试验,并对其播期和施肥水平做了探讨。结果发现:滇型杂交早粳稻在湘南双季稻区种植时全生育期为115～120 d,产量达9 t/hm2,比对照生育期长5～10 d,产量超过10%;作双季早稻种植时最佳播期为3月30日左右,施纯氮262.5 kg/hm2时,产量仍有增加。

Hybrid early indica rice cultivar ＂Jingyou 402＂ as the contrast group, 18 dian-type hybrid early japonica rice cuhivars introduced from Yunnan were studied in comparative experiments, their periods of sowing and fertilization level were discussed, too. It was concluded that the whole growth period of dian-type hybrid early japonica rice varied within llS-120 d, yield was 9 t/hm^2 in the double cropping rice areas of southern Hunan. Compared with the control, its growth stage increased 5-10 d and yield increased 10%. Sowing time was about 30, March. Their yields increase if level of fertilization N reach 262.5 kg/hm^2.