String beans are one of the vegetable varieties with high daily consumer demand. Fertilization management is very important if you want to grow string beans, because string beans are in high demand for fertilization. Let's learn from which angles to fertilize green beans to achieve high yield. 1. Nursery fat The planting of string beans is mainly live broadcast. With the development of cultivation techniques for string beans in protected areas, methods for transplanting seedlings have gradually become popular. The nutrient soil used for nursery should be a vegetable garden soil that has not been planted with string beans in 2 to 3 years. It is made by mixing 4 parts of vegetable garden soil with 4 parts of rotted horse manure and 2 parts of rotted chicken manure. Then add 2 ~ 3 kg of superphosphate and 0.5 ~ 1.0 kg of potassium sulfate. Soil acidity and alkalinity should be neutral or weakly acidic. Soil overacidity will inhibit the activity of rhizobia on acidic soil. Appropriate lime can be used to neutralize acidity. When lime is applied, it should be mixed with bed soil. Large or uneven mixing can easily cause burning seedlings and ammonia volatilization, causing gas hazard. 2. Base fertilizer String beans are fat crops in beans. Although they have nodules, the nitrogen fixation is weak. In the seedling stage of rhizobia, it is necessary to use the available nutrients in the base fertilizer to promote plant growth and development. Generally, 4000-5000 kg of stable manure per mu, or 5000 kg of decomposed organic fertilizer, and 20-35 kg of superphosphate , Plant ash 100 kg. The basic fertilizer of dwarf string beans can be reduced appropriately. Roots of string beans have higher requirements on soil oxygen. The application of unrotted chicken manure or other organic fertilizers will increase the reducing gas in the soil and reduce the oxygen. Therefore, applying base fertilizer should pay attention to the selection of fully decomposed organic fertilizer, and it is not suitable to use too much nitrogen fertilizer as seed fertilizer. 3. Topdressing Green beans 20 to 25 days after sowing, when the flower bud differentiation of green beans begins, if there is no sufficient base fertilizer, the green beans show the symptoms of lack of fertilizers, and topdressing should be carried out in time, applying 20% ​​to 30% of the biogas slurry per mu for about 1500 Kilograms, potassium sulfate can also be added to 4-5 kg ​​per 1000 kg of dilute manure. Early application of top dressing has obvious effect on yield increase, but applying too much nitrogen fertilizer at the seedling stage will make green beans long. Therefore, whether top dressing should be based on plant growth. Green beans require the most fertilizer during the flowering and poding period. The nutrients of the vine varieties during the podding period mainly come from root absorption, and part of them are transported from the stems and leaves, and the flowering and podding periods are longer and the dwarf variety string bean The nutrients transported by stems and leaves during the period are higher than those absorbed by the roots. Therefore, the vine varieties need a larger amount of fertilizer than the dwarf varieties, and the number of fertilization times should be increased accordingly. Generally, dwarf string beans are top-dressed 1-2 times, and overgrown string beans are top-dressed 2-3 times. Each time topdressing urea 7 ~ 11 kg, potassium sulfate 10 ~ 15 kg, the dosage of nitrogen fertilizer is halved in the last time, and the dosage of potassium fertilizer can also be halved or not applied. 4. Matters needing attention The fast-acting nutrients are needed at the seedling stage of string beans, so the basal fertilizer should be rotted organic fertilizer, a small amount of nitrogen fertilizer, and phosphorus and potassium fertilizers. The fertilizer is turned into the soil and then ridged. The amount of base fertilizer for dwarf varieties is about 80% of vine growth. However, it should be noted that adding too much nitrogen fertilizer to the base fertilizer will cause the plant stem and leaf tissues to be young and long. For the cultivation covered with plastic film, the amount of basal fertilizer should be increased appropriately compared with open cultivation because of inconvenient top dressing. In summary, friends who want to learn green bean fertilization can refer to it. In addition to fertilization, it is important to plant green beans, and watering is also the key. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone X Ray Side Protection Lead Goggles X Ray Side Protection Lead Glasses,X Ray Side Protection Lead Eyewear,X Ray Side Protective Lead Glasses,Side Protection Model Lead Eyewear Longkou Kangxie Medical Instrument Co., Ltd , https://www.kangxiemedical.com