| The experiment was conducted to study the canopy temperatures and the growth of winter wheat at different moistures in sprinkle irrigation. The results showed that the canopy temperature in sprinkle irrigation varied generally in the same manner as that in conventional irrigation did. When the irrigation water reached a certain amount, the canopy temperature tended to rise instead of continuing to decline and the soil moisture had a relatively weakened effect on the canopy temperature so as not to be a major decisive factor; meantime, when the irrigation water reached a certain amount, it would negatively affect the growth of winter wheat and lowered the water use efficiency. Where wheat had sufficient soil moisture before sowing and were irrigated at re-greening and jointing stages, respectively, the amount of irrigation water should not be too high during wheat growth and it was not advisable for the amount of water for each irrigation to surpass 300 m3/hm2. |