(一) 最近,我们到一些试种杂交晚稻的地区进行了调查,普遍反映:增产显著;成熟早;高温伏旱地区能避过抽穗期高温危害。杂交水稻无论在川东南作双季晚稻,还是在川西平原作玉米连作晚稻,增产都很显著。杂交晚稻的试种成功,很可能从根本上突破晚稻产量长期不稳不高的局面,促进玉米连作稻和双季稻的进一步发展。开县海拔600公尺以下的低坝地区,种双季稻已有 (A) Recently, we have conducted surveys in some areas where hybrid late rice has been tested. The results generally reflect: significant increase in yield; early maturity; high-temperature and drought-free areas can avoid the high temperature damage caused by heading. Hybrid rice in both southeast Sichuan as a double season late rice, or in the western Sichuan plain as a continuous crop of late rice, increased yield are significant. Successful hybrid rice cultivation, is likely to fundamentally break the long-term instability in late rice production to promote continuous cropping rice and double cropping rice further development. Kaixian at an altitude of 600 meters below the dam area, double cropping rice has been