Fruit trees enter the fruit expansion period. What if the weather is dry?

High temperature is easy to cause atmospheric dryness, increase crop water evaporation, reduce soil water status and cause drought. Drought can make the stomata of fruit trees no longer close, aggravate the evaporation of water from branches and leaves, directly affect the growth and development of oil fruits, and lead to physiological fruit drop. High temperature and drought will also reduce the photosynthesis of fruit trees, improve the respiratory intensity of fruit trees, reduce the synthesis and accumulation of organic nutrients, and affect the growth of oil and eye differentiation. High temperature and dry weather, orchard growth or covering grassland are very important countermeasures. The roots of 3354 fruit trees are their brains and are very sensitive to external environmental conditions. The suitable temperature for root growth of most fruit trees is between 13 ~ 26, and it will stop growing when it exceeds 30 or drops below 0. After the root system of fruit trees stops growing, the white capillary roots that really absorb nutrients accelerate aging, which is very unfavorable to the absorption and storage of nutrients. In summer, the surface temperature of the orchard planted with grass is reduced by 3-5, and an ecological stable layer is established at the roots to prolong the growth time of the roots and promote the absorption and synthesis of nutrients by trees.

In response to the high temperature and dry weather, timely irrigation of fruit trees can not only improve the soil water supply and temperature and humidity conditions in the orchard, but also meet the water demand of leaf evaporation and fruit expansion, and reduce the harm of drought and high temperature heat loss to fruit trees. Especially in orchards with long drought time, don't water a lot at once and flow a lot of water. It is best to irrigate with small water frequently to avoid roots and cracks. In view of the high temperature and dry weather, the effect of watering trees is obvious. 3354, the temperature is above 35 degrees. We can sprinkle water on the tree crown at 5 pm when the sun is no longer exposed, so as to reduce the temperature, increase the humidity, improve the microclimate of the orchard and reduce the damage of high temperature and direct sunlight to trees and fruits.

In the process of fruit tree management, fruit trees enter the expansion period, and high temperature and drought bring many difficulties to fruit tree growers. At this time, many people are at a loss and have to take care of it. High temperature weather is easy to cause atmospheric dryness, increase crop water evaporation, reduce soil water status and induce drought. Drought makes the stomata of fruit tree leaves not close, and the evaporation of water in branches and leaves intensifies, which directly affects the growth and development of oil fruit and flower bud differentiation, thus leading to physiological fruit drop. Hot and dry weather often leads to bar drying and fruit burning. In particular, there are many weeds in orchards, which provide cooked food places for various pests and aggravate the harm of diseases and insect pests such as white powder, aphids, red spiders and broad beans.

Adhere to the guiding ideology of giving priority to prevention and comprehensive prevention and the principle of early treatment, light treatment and heavy treatment. Spray the medicine once a month. If there are no obvious pests and diseases on the fruit trees, prevent and control the pests and diseases in time, and do not use highly toxic and irritating incense. In a word, we should take a cautious and scientific attitude, adjust measures to local conditions, make rational use of effective ecological means such as planting, chemistry and physics, and do a good job in pest control and management.