上海郊区后季稻栽培面积约320万亩,在粮食生产中占较大比重,可是,历年来单产提高不快,产量不稳。主要原因是抽穗扬花期间,常受9月下旬晚秋寒潮侵袭,授粉结实不良,较大面积不灌浆,对产量影响较大,关门稻受害更重。为此,研究回避灾害性天气的栽培技术,是提高后季稻单产和 Suburban rice cultivation area of ​​about 320 million mu in the suburbs of Shanghai, accounting for a larger proportion of grain production, however, over the years to improve yields unpleasant yield instability. The main reason is that during the flowering and flowering period, it is often affected by the late autumn autumn cold wave in late September, pollination and poor fruiting, and the larger area is not grouted, which has a great impact on yield and more damage to close rice. To this end, the study of cultivation techniques to avoid disastrous weather is to improve the yield and yield of the latter part of rice