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为了探讨杂交水稻亲本花期相遇的计算方法,我们在1977年试验研究的基础上,1978年在南京气象学院和徐州、建湖、兴化、扬州、海安、句容、丹阳等气象台站组织了联合试验。对南优、汕优的一些亲本设置了分期播种试验(最早播期为4月20日,最晚为6月20日,每隔5—10天播一期,每站共播7—9期),并辅以盆栽,进行了观测研究。 过去一般多用叶龄法预测花期相遇,近年来的实践表明,由于父、母本的出叶速度、总叶片数都与生育期间的天气条件(尤其是温度)有关;而天气条件因地点、播期、年份不同有很大变化,因此叶龄指标很不稳定。本文仅对杂交水稻花期相遇的积温指标及其计算方法作一些探讨。
In order to explore the calculation method of hybrid rice parental florescence encounter, on the basis of the experimental study of 1977, we organized a joint team at Nanjing Meteorological Institute and meteorological stations such as Xuzhou, Jianhu, Xinghua, Yangzhou, Hai’an, Jurong and Danyang in 1978. test. On the southern gifted, Shanyou some of the parents set up a staged sowing test (the earliest sowing date is April 20, the latest is June 20, every 5-10 days broadcast a period, each station co-broadcast 7-9 period ), Supplemented by potted plants, conducted observation and research. In the past, the general use of multi-leaf age forecast flowering encounter, in recent years, practice shows that due to the parent and the female leaf out of the speed, the total leaf number and reproductive weather conditions (especially temperature); and weather conditions due to location, broadcast Period, the year has greatly changed, so the leaf age index is very unstable. This paper only discusses the accumulated temperature index of hybrid rice flowering stage and its calculation method.