1. Regulating the ground temperature
The high temperature and strong light in summer mean that the ground temperature can easily rise above 30°C. The optimum temperature for strawberry root growth is 15-22°C, and the ground temperature exceeds 30°C, and the root system almost stagnates. In some areas, due to the high ground temperature from July to August, there are only two peaks of root growth in April to June and September to October.
Therefore, it is necessary to ensure that the ground temperature is within a suitable range for the strawberry seedlings in the summer. Under normal circumstances, the soil temperature is 5-7℃ lower than the air temperature during the day, and the upper limit of the nursery field temperature is maintained at 28-30℃, and the ground temperature is relatively suitable for the growth of roots.
Common measures to reduce temperature include: covering shading nets, spraying cooling agents, storing water in canals, and replenishing water for sprinkler irrigation facilities.
2. Ensure adequate moisture
Strawberries can neither be dry nor waterlogged. When the soil is dry, the development of the root system is hindered, aging is accelerated, and in severe cases, it withers and dies. In addition, when the soil is dry, the soil salt concentration rises, and the root system is prone to salt poisoning. Evaporation is large in summer, and if water is used to control prosperity, it is easy to cause soil drought and affect the normal growth of roots. When the strawberry extracts the stolon and develops new adventitious roots, the soil moisture content is about 70%, and when it is lower than 30% for a long time, the root system almost stops growing.
Strawberries are also not tolerant to waterlogging, and require good soil permeability and no water in the seedbed. Pay special attention to field drainage in the rainy season.
Therefore, keep the soil moist in summer, pour small water frequently during droughts, and avoid flooding with large water. The soil should be loosened in time after pouring. In high-temperature seasons, you should master the "cool time, cool ground, and cool water" to irrigate the small water frequently, so that the ditch system is unblocked. At the same time, it is necessary to cut off the channel for water evaporation in combination with the growth of the hoe, which is conducive to maintaining soil moisture.
3. Maintain good permeability of the soil
Strawberry likes neutral or slightly acidic soil with loose, organic matter-rich loam or sandy loam. After summer rains, many soils are hardened due to rain. Such soils first reduce soil permeability and affect root system and microbial activity. Second, it is not conducive to the loss of soil temperature. It keeps the ground temperature at a high temperature for a long time, which is not conducive to the root system. Normal growth. In addition, if the fertilizer is flushed, sometimes a layer of black material will remain on the ground, mostly fertilizer carriers or fillers, which will also reduce the permeability of the soil, so it is recommended to hoe in time. In order to maintain good permeability of the soil.
Fourth, choose the right rooting agent
A large number of experiments have proved that during the growth process, the nutrients produced by photosynthesis of strawberries are transported to the various organs of the plant. If hormone rooting agents are used, the root system will compete for excessive nutrients, which is not conducive to the growth of above-ground plants. Therefore, Seaweeds, amino acids, humic acid (Fugen), EM bacteria liquid, and chitin rooting agents should be selected, which can not only improve soil structure, improve soil fertility and promote the growth and development of strawberry roots, but also balance plants Grow.
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