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双晚杂交粳稻后期的主要生理特性是库大源相对不足。即穗大颖花数多、抽穗快、齐穗后基鞘物质运转率和灌浆速度不如杂籼快，且有二次灌浆等特性。因而，此期高产栽培技术关键是稳库增源，提高结实率和千粒重。1．巧施粒肥适时适量施好粒肥是稳库增源的重要措施，增产效果明显。
The main physiological characteristics of late-maturing japonica hybrid rice was relative lack of big source. That spike large number of flowers, heading fast, basking after the sheath material turnover rate and filling speed hybrid hybrid fast, and secondary grouting and other characteristics. Therefore, the key to high-yielding cultivation techniques in this period is to stabilize the source, improve seed setting rate and grain weight. 1. Clever fertilizer timely and proper application of granule fertilizer is an important measure to stabilize the source, yield increase effect is obvious.