Nursery is an important part of tomato production. The quality of seedlings is directly related to the level of yield. The following is a brief introduction to common problems, causes and countermeasures of tomato breeding. First, the emergence of uneven 1. Inconsistent emergence at the same site of the same seedbed Reasons: poor seed quality, such as inconsistent maturity, when the new seeds mixed with germination when washing, turning uneven, improper temperature and humidity; seed disinfection is not completely affected by the virus, will make the germination is not uniform. Countermeasures: Before germination, germination test should be conducted to select seeds with strong germination potential and high germination rate. Seeds must be disinfected and cannot be directly sowed with seeds of pathogenic bacteria. Dipping and digging during the process of germination should strictly control the temperature and humidity and avoid boiled seeds. 2. Inconsistent emergence of different parts of the same seedbed Reason: seedbed uneven, bottom water poured unevenly, wet first emerged, stem does not emerge seedlings; uneven light, temperature is different, the seedling sunny place than the back of the temperature is high, the emergence of fast; ground heating wiring is not reasonable, dense line High temperature, rapid emergence; after sowing, inconsistent thickness of the cover soil, slow growth at thick places, seedlings late seedlings insulation conditions, poor cover in some places, leakage and low temperature, affect the emergence; damage to the film, often leaking, local bed Over-wet soil causes low temperature and high humidity, which is not conducive to emergence; organic fertilizers are not fully decomposed, with pathogens, or there are hazards such as cockroaches, cockroaches, and rats. Countermeasures: Choose high-lying, well-drained, leeward-looking plots, intensive cultivation and cleanliness; strictly select and formulate nutritious soil, bed soil should be fertile and loose; disinfect seeds and soil, use pesticides to protect seedlings, reduce disease, Insects, rodents; leveling seedbeds, pouring enough water; uniform sowing, uniform covering, after sowing to strengthen management, so that all parts of the seedbed temperature, humidity, permeability consistent. Second, seedling roots and roots 1. Roots When roots (roots) are rusted, the roots are rusted. When the roots are severe, the roots are rotted and the roots are not long. The seedlings are easy to wither. Reason: bed soil temperature is too low, humidity is too large. Countermeasures: Make a reasonable bed soil, improve nursery conditions, maintain proper temperature, strengthen ventilation, control watering, adjust humidity, and do not water even on cloudy days. Once the roots occur, promptly ventilate and dehumidify, increase the evaporation amount; diligently plough loose soil, increase the permeability; seedlings add slaked lime with 3% slaked lime, or spray high-efficiency foliar fertilizers. 2. Burning root When the roots are burned, their roots are yellow, not long, but they do not rot, but they do not rot. The ground part grows slowly, and is short, brittle and hard, and has no hair. The leaves are small and wrinkled. It is easy to form small old seedlings. Cause: The organic fertilizer is not fully decomposed, or is not fully sieved and mixed with the bed soil; local fertilization is too much, the concentration of the soil solution is too large; the soil is dry and the soil temperature is too high. Countermeasures: Select adequately cooked organic fertilizer to uniformly prepare bed soil, do not use excessive fertilizer, must control the concentration of fertilization, and strictly use according to the regulations; watering should be appropriate to keep the soil moist; reduce the soil temperature; appear burning root, appropriate Watering, reducing the concentration of soil solution, and depending on the seedlings increase the number of watering. Three, long seedlings The leggy seedlings are also called tall seedlings. They have fine stems, long internodes, few leaves, thin and large leaves, light green leaves, soft tissues, undeveloped root systems, poor resistance to disease and stress resistance, low photosynthetic levels, and slow growth after planting. Seedlings are slow and survival rate is low. Reasons: lack of light, night temperature is too high, too much nitrogen fertilizer and water; seeding density is too large, mutual crowded and leggy seedlings; seedlings out before and after the poor temperature management, bed temperature is too high. Countermeasures: Select seedbeds where the leewards are sunny, keep the membrane clean, increase the light transmittance, and enhance the light. Use shade nets as little as possible. Promptly ventilated, properly reduce the night temperature, strictly control the humidity, so that the night temperature is maintained at 15 °C -18 °C. Diluted sowing, and time seedlings, transplant seedlings to prevent seedlings crowded. Nitrogen, phosphorus and potassium fertilizers are used together. Use growth inhibitors to control leggy, such as spraying 2000-4000 mg/kg for longer. Fourth, aging seedlings Slow growth or stagnation, root ageing and rusty, dwarfed stems, short internodes, small and thick leaves, dark and dull leaf color, brittle hard, inflexible tissue, slow growing after planting, weak growth, low yield, such as cucumber The "flower topping" phenomenon is the typical symptom of aging or young seedlings. Causes: bed soil is too dry, bed temperature is too low, seedling age is too long, nutrition is insufficient, water control is too strict, excessive hardening; seedling nursery seedlings, due to groundwater cut off, watering is not timely and cause serious water shortage Accelerate aging of seedlings. Countermeasures: The seedlings should be moderate, the time for the low-temperature hardening can not be too long, the water supply is suitable, and the water can be promptly ventilated and dampened after watering. Found that the aging seedlings, in addition to attention to normal management of temperature and humidity, you can spray 10-30 mg / kg of gibberellin solution, or spray foliar treasure and so on. V. "Sheng Miao" and "Sweet Miao" Seedlings can't adapt quickly to the drastic changes in temperature and humidity, resulting in violent water loss, and cause the leaf margins to dry, the leaf color to turn white, and even the leaves dry. Hyperventilation and excessively fast dehumidification are called “sweeping seedlingsâ€. The wilting caused by excessive warming and lack of timely ventilation is called “smuggling seedlingsâ€. Reasons: The former is suddenly ventilated, the air exchange inside and outside the seedbed is intense, causing a sudden drop in the humidity inside the bed. The latter is under low temperature, high humidity, low light, excessive nutrient consumption, poor resistance, long and sunny clear, warming too quickly, ventilation is not timely and not adapt. Countermeasures: Ventilation should be open from the leeward side. Vents should be from small to large and time from short to long. Rainy weather, especially on cloudy days, should be exposing and covering. And potassium dihydrogen phosphate solution foliar spray fertilizer. The company was founded in December 1995 with a registered capital of 300 million yuan. It is a private enterprise integrating R&D, production and sales of labor protection products. The company has a professional R&D team, standardized production lines and quality testing facilities. The company produces and operates more than 1,000 products, which can meet the all-round needs of labor protection "from head to toe". Workplace Shirts,Men's Shirts,Casual Shirts,Women's Shirts, Men's and Women's Shirts, Casual Shirts, Manufacturers in China Dongying Hong Xing Labor Protection Products Co.,Ltd. , https://www.hongxinglabor.com
The company is located in Dongying City, the central city of the Yellow River Delta, where the Yellow River enters the sea, where the grandson was born, and the Shengli Oilfield rises here. The two national strategies of [Yellow and Blue", the cooperative development of the Bohai Rim region and the coordinated development strategy of Beijing, Tianjin and Hebei are implemented in Dongying. Superior environmental advantages. Since its establishment, the company has always adhered to the company tenet of "people-oriented, sincere service", vigorously promoted the "Red Star" spirit, and earnestly fulfilled the mission of "growing together with employees, progressing with the times, seeking well-being for the society, and contributing to the country", Actively act and seek progress while maintaining stability. The company's products serve many fields, and the products are sold to both domestic and international markets. The company has successively become the director unit of the Occupational Health Protection Products Committee of China Textile Business Association, the member unit of China Labor Protection Products Alliance, the member unit of Shandong Labor Protection Products Industry Association, and the top 50 enterprises in the national labor protection industry; Anbel brand has become the labor protection products industry in Shandong Province. Association recommended brand.