After the dry weather, why doesn't Tianbao spray tons of corn with rolled leaves?

Under drought conditions, plants are in a state of water shortage, and endogenous hormones related to stomatal regulation in plants change. For example, with the increase of ABA content, in order to reduce the evaporation of water in maize, the stomata of leaves are closed unevenly, which leads to the adaptive curling of leaves, thus reducing the evaporation of water, which shows that maize has strengthened its self-protection function. After spraying this product, the root system of maize becomes larger, the root activity is enhanced, and the number of air roots and lateral roots is increased. Therefore, the scope of maize root zone is expanded, the water source available for maize absorption and utilization is increased, the water absorption capacity of root system is enhanced, and the root system absorbs more water supplied to the leaves above ground. Therefore, under drought conditions, the leaves of the corn field sprayed with the product will not curl. However, if there is further drought, when the soil water content drops to a very low level (the relative water content drops below 30%), the corn sprayed with tons of natural forest protection will also curl to protect itself, resulting in a much lower curling degree than that of the plots not sprayed with tons of natural forest protection (color map 18).