Under sprinkling irrigation, when the irrigation rate exceeded 150mm after the wheat returned green, its effect on leaf water potential decreased.
During the day water loss by transpiration exceeds water absorption by the roots and leaf water potential decline.
It was shown by the experiment carried out in the sprinkling irrigation area that change in leaf water potential was obvious at 14:00 everyday;
When soil moisture contents were above 9.5%, there was no apparent change in leaf water potential with a drop in soil moisture contents.
The analysis of variance shows a significant effect on the interaction of heat stress and growing media on leaf water potential when the treatment is applied only at midday.
It was revealed that significant differences in leaf water potential, stomatal resistance, transpiration rate, and rate of water loss of excised-leaves existed among genotypes.
The above inclusions show that the plant water stress is due to the lack of water, Thereis obvious negative correlation between CWSI and leaf water potential.
