摘要
对两系育培矮６４Ｓ及其组合在湖南省制种中的几个关键气象问题进行了试验研究．结果表明：培矮６４Ｓ的育性转换温度为２３．５℃，在郴州仅３６年一遇，适宜广大湘中以南低海拔区制种，对湘北湘西则不大适宜；培两优组合制种适宜扬花的气象条件为：温度２９．１～３３．０℃，湿度７１％～９０％；当培矮６４Ｓ育性敏感期内未出现连续３ｄ平均在２４．０℃以下的天气时制种纯度可达９９．５％以上；最适花期为８月下旬．
Several significant meteorological problems with the seed production for Peiliangyou combinations were studied and the results showed that 23.5℃ was the criticle temperature for the fertility alteration of Peiai 64S.For the temperature (≤23.5℃) happened only once during the last each 36 years in Chenzou, Hunan, it suggested that it be suitable to grow the variety in the lower elevation zones from the center to the south and be unsuitable in the north and west area in Hunan for the seed preduction of Peiliangyou combinations.The meteorological condition (temperature 29.1￣33.0℃, humidity 71%￣90%) was the most favourable blossoming period for the seed production.Its purity would be beyond 99.5% when the average temperature was not lower than 24.0 ℃ during continuous 3 d in the susceptible period of this line's fertility alteration.Augest 20 to 30 d was the most favourable bloosming period.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
1996年第6期528-532,共5页
Journal of Hunan Agricultural University(Natural Sciences)
关键词
水稻
杂交组合
制种
气候因子
湖南
paddy combination production of hybrid seeds climatic factors Hunan
