lndex 0f reasonable sunshine-hour and temperature and its effect on growth period and output of Safflower

The effects of reasonable sunshine-hour and temperature index on the duration period and output of“New safflower 1”and “New safflower 2” are studied in this paper．The results show that the major influences of emergence of seedlings are temperature and soil humidity；number of days of seedlings～ramification and index of reasonable sunshinehour and temperature are negative correlative；number of days of seedlings～ramification and duration period are positive corre1ative：duration period and index of reasonable sunshine-hour and temperature，density are negative correlative．Output and index of reasonable sunshine-hour and temperature are closely corelative，the relative output is more than 90％ when index of reasonable sunshine-hour and temperature is in 140～150．Number of days of emergence of seedlings and index of reasonable sunshine-hour and temperature are in good corelation in Xinhe and Fuhai，the optimum emergence of seedling date is on 6～27 April．Its homologous duration period is 108～125 days when the density is 165 thousand zhu／hm² and is 93～110 days when the density is 300 thousand zhu／hm²．