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以10个籼型双晚杂交稻组合为材料,在双季稻北缘地区(安徽桐城)作再生稻栽培,并与双季籼稻进行比较。试验结果:10个组合再生稻头季全生育期133～142 d,平均137.3 d,产量7.62～10.41 t/hm2,平均9.18 t/hm2;再生季全生育期59～69 d,平均63.8 d,产量3.26～5.56 t/hm2,平均4.30 t/hm2;2季总产11.12～14.93 t/hm2,平均13.48 t/hm2。与双季籼稻2季产量相比,10个组合中有4个组合再生稻2季增产;10个组合再生稻2季经济效益均高于双季籼稻2季,每公顷多收入207～8 835元,平均5 426元。结果表明,在双季稻北缘地区选用丰源优358、隆平207、金优284等高产稳产、抗倒性强、穗形较大、母茎再生率高且再生穗多的双晚籼型杂交稻组合培育再生稻,不仅省工、省成本和提高经济效益,而且可提高产量。
Ten indica hybrid rice combinations were used as materials for the cultivation of ratoon rice in the north edge region of double cropping rice (Tongcheng, Anhui) and compared with double cropping indica rice. The results showed that the whole growth period of the three combinations of ratooning rice was 133 ~ 142 d with an average of 137.3 d and the yield was 7.62 ~ 10.41 t / hm2 with an average of 9.18 t / hm2. The whole growth period was 59 ~ 69 d (average 63.8 d) The yield was 3.26-5.56 t / hm2, with an average of 4.30 t / hm2. The total production in the second season was 11.12-14.93 t / hm2 with an average of 13.48 t / hm2. Compared with the two-season indica rice yield in two seasons, four combinations of ratooning rice in four combinations increased yield in the second season; the economic benefits of ten combinations of reclaimed rice in two seasons were all higher than those in double-season indica rice in the second season, and the income per hectare was 207-8 835 Yuan, an average of 5 426 yuan. The results showed that the double late indica rice variety with high yield stability, strong lodging resistance, large spike shape, high stem regeneration rate and spikelet regeneration was selected in the northern margin of double cropping rice by using Fengyuan 358, Longping 207 and Jinyou 284 Hybrid rice combination ratooning rice cultivation, not only provincial, provincial costs and improve economic efficiency, but also increase production.