Abstract: Temperature fluctuation is the key problem in safeguarding the seed production of two-line hybrid rice.An experiment with deep water-and moistening irrigation and four sowing dates showed that the temperature at 20 cm height was an accurate indicator for fertility transfer.The study on the stem temperature,leaf temperature,and air temperature at the heights of 20 cm and 40 cm in deep water and moistening-irrigated fields showed that after deep water-irrigation,water layer,as the main heat source,led to a slower and less heating than air,because of the long wave radiation and convection,and,the effective heating was at the height below 40 cm.In this irrigated field,the daily maximum temperature was T_Q40>T_Q20>T_J20>T_Y40, which was affected by solar radiation,while the daily minimum temperature was T_Q20>T_J20>T_Y40>T_Q40,which was affected by water temperature.Based on the close relationships between water temperature and air temperature at the height of 150 cm,relative humidity at 20 cm,wind velocity at 200cm,and stem temperature and air temperature at 20 cm,an applied model was built.

Key words: Aneurolepidium chinense, Saline stress, Alkaline stress, Stress mitigation, Calcium, Abscise acid, Proline