The weather is cloudy and sunny, what should I do if the vegetables are weak?

    The seedlings planted by many vegetable farmers have weak growth, small leaves, light leaf color, thin stems, slow overall growth, and frequent diseases. Due to weak light, the growth of vegetable seedlings is relatively weak, which is normal. So, what should we do with vegetables in early spring?

    1. There are many reasons for weak trees, find the root cause

    1. Weather is the primary cause, low temperature is the key

    There is no doubt that weak trees are common, and weather conditions are the primary factor. There are frequent haze weather, weak light and low temperature in the shed, and the seedlings cannot grow well.

After the vegetables are planted, the outside temperature is lower than in previous years. Such a temperature is difficult for the greenhouse to ensure the normal growth of vegetables at night. Frost appeared on the film after the greenhouse was opened in the morning, which caused low temperature obstacles to many newly planted vegetables, affecting the vegetables. normal growth.

     2. Unreasonable fertilization and burning of seedlings are common

    The use of insufficiently decomposed manure when changing crops in winter often causes root burning and affects the speed of slowing the seedlings. If the burning of the seedlings is severe, the vegetable farmers need to replace the seedlings again, which not only wastes money, but also affects the time to market of vegetables, which is not worth the loss.

    3. Excessive watering after planting leads to retting of roots

    Many vegetable farmers believe that it is not a big problem to water the first water after vegetable planting. In fact, it is not the case. Excessive watering at any time will cause insufficient oxygen supply in the rhizosphere of vegetables, especially the planting water. Because the soil has just been ploughed and the texture is loose, it is very prone to retting problems. Once the roots of vegetables are composted, the growth will be weak, and they will not grow for a long time. Therefore, after planting vegetables, we must pay attention to reasonable watering, and avoid excessive watering at one time.

    2. Grasp the key points and do a good job of promoting growth in the seedling stage

    1. Strictly control the quality of seedlings to prevent diseased and weak seedlings

    When vegetable farmers receive seedlings, they must learn to judge the quality of seedlings. At first glance, the leaves should be fresh and tender, green with yellow in the green; secondly, the stems and leaves should be free of any disease spots, the leaves are stretched, the color is bright, the back of the leaves is free of insect eggs, and the stems are thick; thirdly, the root tips are tender and white, with many root hairs and active activity. powerful.

    2. Cultivate strong trees and promote roots first

    Vegetable seedlings that have been planted are weak, and vegetable farmers should start from various aspects to improve environmental conditions and promote the growth of plants from weak to strong. One of the most important point is to promote root.

    1. Create a soil environment suitable for root growth. If you want to promote root, the most important point is to create the environmental conditions suitable for root growth, including suitable temperature, water and fertilizer, oxygen and so on. In terms of temperature, in winter, the temperature is low, the light is weak, and the ground temperature is also low. After planting, it should be covered with plastic film immediately, which is conducive to maintaining a high ground temperature. In terms of water and fertilizer, the planting water must be as small as possible, and it is best to only water around the planting hole, leaving room for the "breathing" of the root system. When the environmental conditions are good, the roots can absorb more nutrients after regeneration and promote the robustness of the plants.

    2. Root irrigation promotes rapid root regeneration. When the tree is weak, its natural recovery speed is slow, especially when the roots are severely damaged by fertilization and planting, it is necessary to quickly promote root regeneration, enhance root activity, and make plants recover faster.

    3. The leaves supplement nutrition and increase the supply of organic nutrients. Almost all the organic nutrients required for root growth come from the supply of leaves, so in addition to rooting, we should also pay attention to the supplementation of leaf nutrients to keep the leaves in good condition.