Effects of Temperature to Seed Emergence,Seedling Growth and Anthesis of Peanut

Field staggering sowing experiment results showed that the. period of seed emergence and seedling stage became short and dry matter accumulation rate speeded up as air temperature increased. The relationship between seed emergence rate and air temperature can be expressed by equation of y=aebx. The period of seed emergence will be shortened one and half day with every increase of 1℃ within 14-23℃ and the seedling stage will be shortened two to two and half days with every increase of 1℃ within 19-23℃ which fit to the equation of y = a+bx. The optimum air temperature for anthesis was 24-25℃. When the average air temperature was higher than 25℃ or lower than 24℃ , the flowering number decreased obviously. The high temperature could concentrate the flowering time, move up the flowering peak time, increase the flower number at peaking time and shorten the flowering period. Low temperature could slow the anthesis, disperse the number of flowers and elongate the flowering period. The flowering stage would be shortened three to four days with every increase of 1℃ within 22-27℃.