Cause Analysis
High temperature will aggravate the transpiration of the leaves. If the root system is not strong and well developed, the fertilizer water absorbed by the root system cannot meet the needs of plant evaporation, and insufficient nutrient supply will cause the plant leaves to curl and yellow leaves, resulting in fewer flowering and fruit setting, and more abnormal fruits. Phenomenon, even premature aging, reducing planting benefits. In addition, the high temperature will also cause the resistance of the plant to drop, the overall growth will be hindered, and the virus disease, nematodes, and pests will increase. Therefore, rooting in summer is a management measure that cannot be ignored.
Rooting measures
The rooting fertilizer for diligent use is affected by high temperature, and the roots of vegetables tend to have fewer hairy roots, weak roots, and poor vitality. It is recommended that vegetable farming use rooting fertilizers to maintain roots, balance plant growth, and activate soil.
Reducing ground temperature and ground temperature directly affect the growth and activity of vegetable roots, and also indirectly affect the absorption of water and nutrients by roots by exerting influences on soil microbial activities and decomposition and transformation of organic matter. If the ground temperature is too high, it will accelerate the senescence of the root system and be susceptible to disease. Under normal circumstances, the soil temperature is 5°C to 7°C lower than the air temperature during the day, and the upper limit of the greenhouse temperature is maintained at 28°C to 30°C. The ground temperature is relatively suitable for root growth, so In summer, it is necessary to use diligent water pouring and soil cultivating to lower the ground temperature and protect the root system. In addition, during the summer when vegetables are vigorously grown, no sudden watering is allowed. This will cause the temperature around the rhizosphere to suddenly drop, causing the plants to wither and even die.
To improve soil permeability, it is recommended that vegetable growers try not to cover plastic film or late film in summer. They usually pay attention to diligent hoeing to improve soil permeability. Chemical fertilizers and functional fertilizers are used interchangeably to avoid soil compaction and salinization. In short, "the soil is good and the roots are good." When the soil is well conserved, a strong root system can be bred, which lays a good foundation for future high yield and quality.
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