Recently, many growers have reported that their tomato seedlings have slowed down and slowed down after transplanting, which can make farmers' friends extremely bad. So what is the cause of slow tomato sprouting and not growing?
First, poor soil permeability leads to slow root growth
Soil stickiness, inadequate application of organic manure such as chicken manure and rice husk, poor soil permeability and poor rhizosphere environment are one of the important reasons for delaying the planting of tomatoes after planting. In the case of soil stickiness, it is best to improve the soil before the plants are planted. For tomatoes after planting, the following measures can be taken to improve the rhizosphere:
1, reasonable watering should not be poured large water, so as to avoid soil water caused by roots.
2, to be diligent. Every time after watering, it should be timely stroked to improve the permeability of the soil and promote the growth and development of the root system.
3, the application of products containing humic acid, seaweed and other conditioning soil aggregate structure. After the tomato is planted, it can be supplemented with organic sweetening ingredients such as Jiameimei, Profit, Hailibao, etc., which can increase the organic matter content in the soil, improve the soil aggregate structure and improve the gas permeability.
4. Cover the straw to reduce the surface soil compaction.
Second, soil acidification and salinization seriously lead to slow plant growth
The environment of the shed is relatively closed, the land utilization rate is high, and the amount of fertilizer is large. The soil is not leached with rain for a long time, so that the fertilizer can not be leached into the deep layer of the soil with the rain, and remains in the tillage layer. At the same time, the temperature in the shed is high and the soil moisture is evaporated. It will cause the deep salt in the soil to rise to the surface. This slowly changing process is the trend of soil acidification and salinization. Soil acidification and salinization will also make the tomato seedlings in the shed not long and slow. It is recommended that farmers adjust the soil in time by applying lime, sand, re-applying fully decomposed farmyard manure, deep-cultivating the soil, and applying humic acid-soluble fertilizer.
Third, the base fertilizer is not fully decomposed, resulting in secondary fermentation and burning
When the manure is not completely decomposed, the vegetable is planted and the burning of the seedlings occurs every year. In addition, some vegetable farmers believe that root burning is mainly caused by fresh chicken manure, while dry chicken manure is decomposed and does not burn roots. In fact, dry chicken manure is only chicken manure that has been dried at high temperatures without any decomposing measures. It is recommended that the manure should be fully decomposed after the vegetable is planted. When the manure is applied to the shed, the product with professional fermented manure is used, such as fermenting the father and so on for 7-10 days. If the occurrence of burning seedlings should be properly watered, dilute the harmful substances generated during the process of manure decomposing, and pay attention to ventilation to prevent gas damage. In addition, it can be combined with foliar spray of Jiameijin point, brain white gold and other nutrients needed to timely replenish the plant.
4. Planting too deep leads to slow plant growth
Planting too deep is also an important reason why tomatoes do not grow after planting. When the tomato is planted, it is planted according to the distance between the plant and the hole. Under normal circumstances, the depth of planting should not exceed 1-2 cm of soil. It should be affected if the soil is too deep to affect the permeability of the soil and not conducive to the growth of the root system. For tomatoes that have been planted too deep, they should be diligently to increase soil permeability. When the ridged tomatoes are planted too deep, the height of the ridge can be appropriately reduced.
Five, the temperature is low, watering too much, too much
Many vegetable growers think that as long as it is not a big point in the deep winter season, it is not a big problem. In fact, if the water is too large at any time, the supply of oxygen in the rhizosphere will be insufficient and it will be rooted when it is serious. Once the growth potential of the roots is weakened, the tomatoes will not be sown for a long time. Therefore, after the tomato is planted, it is necessary to pay attention to proper watering. Avoid excessive watering at one time to avoid root injury. For the occurrence of roots, the soil should be drained in time to increase the permeability of the soil. After the soil moisture is reduced, 800 times liquid Jiamei dividend or Jinli will be used to irrigate the soil and promote the regeneration of capillary roots.
Six, the point of application of pesticides or fertilizer concentration improperly burned
In recent years, problems such as root-knot nematodes have become increasingly prominent. Many vegetable farmers apply pesticides or bacterial fertilizers before the planting of vegetables. With the improvement of pathogen resistance, the use of drugs is light, and it is easy to occur when it is heavy or uneven. . For this purpose, it is recommended to mix the soil with the soil before applying the fertilizer or fertilizer to avoid the concentration of the agent or fertilizer to damage the root system.
Seven, root disease or root knot nematode harm
Tomato seedlings are mainly rickets and blight, it is necessary to observe various symptoms of tomatoes in time and prevent and treat them early. It is recommended to use the 2500 times solution of carbendazim or metalaxyl plus Jiameihongli root, rooting and rooting at the same time with Plex, fluoromanganese zinc spray.
For root knot nematodes, it is recommended to prevent it. In the summer, the high-temperature shack in the shed period and the application of the root-knot nematode in the cave before the plant is planted, after the planting of the seedling, the avermectin or the 800-fold liquid Jinli+10-15 mothballs are taken in advance to prevent the root knot. Nematode.
Therefore, in order to ensure that the seedlings can be restored to normal growth as soon as possible after planting, the farmers should pay attention to the following points:
First, master the temperature. On the day of planting the seedlings, the temperature of the shed should be increased within 5 days, so as to ensure the temperature required for the seedlings to slow down the seedlings. Generally, keeping it at 28 ° C - 30 ° C during the day and 15 ° C - 20 ° C in the evening is beneficial to promote the slow seedling. When the seedling leaves begin to grow, the wind gradually releases. During the day, the room temperature is controlled to start to ventilate at 25 ° C - 28 ° C over 25 ° C.
The vents are small to large and should not be too strong to prevent the seedlings from being stimulated by the cool breeze. When the indoor temperature drops to 20 °C in the afternoon, the air outlet is closed. The night temperature should be controlled between 11 ° C and 15 ° C. In case of cold current, it can be properly exposed in the evening, covered in the early morning and suspended in the wind. The daytime of cloudy or rainy days is still revealed. (But be sure to respond to bad weather. For example, when the wind is strong, cover the heavy objects to prevent the film from being scratched, and remove the snow in a timely manner to reduce the weight of the shed.)
The second is to adjust the lighting. After the tomato is planted, the illumination time is relatively shortened. Increasing the light intensity and prolonging the illumination time are the key to light management. Therefore, the cover should be exposed early, covered and cleaned in time to enhance the daylighting rate. Conditional growers can hang a reflective curtain on the center pillar and reflect the sunlight that hits the north wall onto the plant near the shed wall. The hanging reflective screen can not only effectively improve the light intensity, but also improve the temperature in the shed and the temperature of the air in the shed to facilitate plant growth.
The third is reasonable watering. Tomato seedlings should be watered immediately after planting. It is best to pour the organic activated nutrient diluted manure water 800 times liquid Jiamei dividend 2-3 times. The water in the lower temperature greenhouse is slow to disperse, so the water volume should not be too large. The water planted by the flat sorghum flows to the hoe immediately to block the water. The amount of water planted in the sorghum can be larger but not over the high ridge.
The fourth is to cultivate the loose soil at the right time. After the watering is not sticky, grasp the hoeing and cultivating. The seedlings are shallower and farther in the distance, but the roots of the seedlings at the time of planting cannot be loosened. The cultivating depth of sorghum planting is about 5 cm; the sorghum is covered with mulch only in the gully, and the depth is not more than 10 cm; the comprehensive cultivating without mulching, the shallow ploughing on the sorghum, and the deep ploughing in the ditch. After cultivating, the seedlings are seeded until the first ear is fruit. If the soil is dry and the plants are short of water, a water can be poured during the seedling process. After watering, it is necessary to strengthen the air release, reduce the indoor air humidity and continue to cultivate the seedlings.
The above is the reason and solution for slow seedlings and no seedlings of tomato seedlings. Only by doing the above measures can tomato seedlings grow faster and grow better.
7 Inch Face Access Control,Face Recognition Access Control With Fingerprint,7 Inch Ultra Thin Face Recognition Terminal,Dual Camera Recognition Access Control System
Chongqing Huifan Technology Co., Ltd , https://www.huifantech.com