杂交水稻制种父母本花期是否理想相遇是制种产量高低的关键。在生产上尽管准确地计算了父母本播种差期,但由于气候变化、秧苗索质、插秧深浅、肥水管理等各种因素的干扰,也会导致父母本花期不遇或相遇不好的现象。因此,认真调查父母本生育进度,及早预测和调整花期,确保制种田父母本花期相遇是夺取制种稳产高产十分重要的一环。而以往,各地普遍应用幼穗剥查法预测花期,实践证明因其预测的时间距离抽穗期较近,对花期调整的效果不够理想。 Hybrid rice seed production of parents is the ideal flowering is the key to the level of seed production. Although parents accurately calculate the difference in sowing date in production, interference with various factors such as climate change, seedling quality, planting depth, fertilizer and water management can also lead to infrequent or poor parental flowering. Therefore, earnestly investigating the progress of parental birth, early prediction and adjustment of the flowering period, and ensuring the flowering of the parents of the farming system is a very important part in seizing the high and stable yield. In the past, the general application of spikelet method to predict flowering around the world, practice proved that because of its predicted time from the heading date, the effect of the adjustment of flowering is not ideal.