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一、引言 近年来,围绕杂交水稻制种花期相遇的积温法预报进行了大量的研究与服务工作。这些工作肯定了积温法预报有一定的应用价值,同时也发现积温值在地区、年度、季节之间的不稳定性,因此采取了一些订正的方法,以提高积温的稳定性。但由于各地供试品种不同,或者因试验设计、观测标准的不一致,使对积温的研究受相当大的限制。1979年,全国杂交水稻气象科研协作组在南京、徐州、长沙、南宁以及福建的汤川(龙溪县)、宁化六个点进行了杂交稻制种花期相遇的积温稳定性研究的联合试验。广东省农业气象试验站(南海点)也按同一设计进行了试验。供试品种为母本珍汕97A,父本IR26,杂交组合汕优6号。
I. INTRODUCTION In recent years, a great deal of research and service work has been carried out on the forecast of accumulated temperature by the flowering of hybrid rice seed. These works have affirmed the application of accumulated temperature prediction has some value, but also found that the accumulated temperature value in the region, the annual, the instability between the seasons, so we have taken some corrective measures to improve the stability of accumulated temperature. However, due to the different test varieties in different places, or due to inconsistent experimental design and observation standards, the study of accumulated temperature is subject to considerable restrictions. In 1979, the national hybrid rice meteorological research team conducted a joint experiment on the study of accumulated temperature stability at hybrid rice flowering seasons in Nanjing, Xuzhou, Changsha, Nanning and Fujian’s Yuchuan (Longxi) and Ninghua . Guangdong Provincial Agricultural Meteorological Experiment Station (South China Sea point) also conducted the same design test. The tested varieties were the female parent Zhenshan 97A, the male parent IR26 and the hybrid combination Shanyou 6.