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1994～ 1 998年在四川泸州自然光温条件下进行籼型光敏不育系 1 1 0 3S的春繁研究。结果表明 :影响 1 1 0 3S春繁产量的关键是育性转换温度敏感期内的环境温度 ,此间日均温高于 2 3.5℃的时间愈多 ,产量愈低。在泸州 ,采用旱育秧于 2月下旬播种 ,保证 1 1 0 3S育性转换的温度敏感期在 5月中下旬 ,并采用增大种植密度 ,始穗期喷施低浓度GA3等农艺措施 ,能显著增加春繁产量
The spring propagation of indica type photo-sensitive male sterile line 1 1 0 3S was studied under natural light and temperature conditions in Luzhou, Sichuan from 1994 to 1998. The results showed that the key factor affecting the yield of 1103S in spring was the ambient temperature during the temperature-sensitive period of fertility transformation. The more the average daily temperature was above 23.5 ℃, the lower the yield. In Luzhou, the dry nursery seedlings were planted in late February to ensure that the temperature-sensitive period of 1103S fertility transformation was in the middle and late May and adopted agronomic measures such as increasing planting density and spraying low concentration of GA3 at the beginning of heading stage. Significantly increase spring production