Vegetables appear too slowly in winter. How to speed up seedling emergence in winter?

Solving the problems of soil hardening and salinization is the basis of promoting root rooting. Only by creating a safe and good root system environment can we ensure root system growth and deepen root system rooting. Through the comprehensive measures of physics, biology and agriculture, loosen the soil, turn the soil into granular structure and promote rooting. Supplementing phosphorus and potassium fertilizer in alginic acid can also stimulate vegetables to take root, reduce the senescence of vegetable leaves and make vegetables recover faster. In cultivation management, we must choose to water or spray drugs on sunny days. Water should be watered with small water, not with big water, in case the ground temperature drops too much. If the growth potential of crops is weak, the effect of fertilizer supplementation is not good at this time, and the roots cannot absorb it. By supplementing Bacillus to improve the growth environment around the root system, the purpose of stimulating rooting can be achieved. At the same time, boron fertilizer was added to promote the elongation of capillary roots, and zinc fertilizer was added to improve the stress resistance of vegetables.

Weak root growth is the root cause of slow growth of vegetables. During the growing period of overwintering vegetables, due to various reasons, the roots began to age, which showed that the vitality of old roots decreased, new roots could not take root, the root population was shallow, and the ability to absorb nutrients and water decreased, resulting in weak growth and low yield of vegetables. Applying 5 kg seaweed bio-fertilizer per mu at seedling stage can root at low temperature, strengthen roots at high temperature, cultivate and repair roots, promote root growth and improve root activity. It can also loosen and purify the soil and enhance the ability of plants to absorb fertilizer, retain water, resist drought and flood, cold, continuous cropping and lodging. The greenhouse loses water slowly and the air humidity is high, which easily leads to serious diseases such as low temperature and high humidity.

Pay attention to water management in winter, and adopt the methods of alternating dry and wet, warm tail watering, early watering and less watering, which will not significantly reduce the temperature and soil temperature. Alternating dry and wet soil is beneficial to the growth of stems and leaves on the ground and can promote the occurrence of new roots. Warm-loving vegetables are vulnerable to freezing injury at seedling stage, especially during seedling hardening, when they are suddenly attacked by cold current, they will freeze the seedlings. Listen to the weather forecast in time and keep warm in case of cold current. After freezing injury is found, proper shading should be done to make the temperature rise slowly, and foliar fertilizer should be sprayed to reduce freezing injury. The nutritional status, resistance, premature senescence and poor flower bud differentiation of plants are rapidly declining, which seriously affects the growth and yield of vegetable plants in the middle and late stage. Even if it is cloudy, it should be managed by measures such as uncovering the cover late and covering early, half-bright and half-dark, and supplementing night light in time to increase the photosynthesis time of plants, improve the nutritional status of seedlings and improve the quality of vegetable seedlings.