After the temperature drops, the ventilation time of the shed will be shortened, and the closed shed time will be prolonged. Once the fertilizer is not applied properly, it is easy to cause fertilizer damage, such as root burning and air damage. Avoid using fertilizers with high nitrogen content Fertilizers with high nitrogen content, such as urea, etc., once a large amount is used, these fertilizers will also produce a large amount of ammonia during the fermentation or decomposition process. If they encounter poor ventilation, they will harm plants. After entering the low temperature season, vegetables grow slowly and require less fertilizer. Topdressing should also be reduced. Generally speaking, you can choose high-quality fully water-soluble fertilizers, 3~4 kg per mu each time. Don't topdress the unripe organic fertilizer In addition to topdressing quick-acting fertilizers such as water-soluble fertilizers and compound fertilizers, vegetable farmers also topdressing organic fertilizers such as corn flour, bean flour, and beans. Corn flour, bean flour, beans and other substances contain high organic matter content, and contain nitrogen, phosphorus, potassium and rich medium and trace elements, which are now recognized by more and more vegetable farmers. Although these organic fertilizers are good, they must be applied scientifically if they want to give full play to their fertilizer efficiency and increase their utilization rate. Corn noodles, bean noodles, beans, etc. can generate a lot of heat during fermentation and are very easy to burn roots, so they must be used after fermentation, which is safer. If the vegetable grower is eager to apply these immature organic fertilizers to the soil, they can first mix the beans, bean noodles, etc. with the biological bacterial fertilizer in a 2:1 amount, and then apply it to the soil layer of about 15 cm to promote it. Fermentation is mature, avoid close contact with roots. The topdressing should avoid the roots of the plants, and it is advisable to spread about 10 cm away from the crop plants. When organic fertilizers such as corn flour, bean flour, beans, etc. are applied directly, they are easy to attract underground pests due to their own fragrance, so it is necessary to mix in an appropriate amount of pesticides for prevention. Corn flour, bean flour, etc. are late-acting fertilizers. When using it, attention should be paid to the application of compound fertilizers, medium and trace elements and certain organic fertilizers. It can also be used with biological bacterial fertilizers. Because biological fertilizer contains a large number of beneficial microorganisms, they can accelerate the decomposition of organic nitrogen and phosphorus in organic fertilizer, which is more conducive to crop absorption and utilization. Remind vegetable farmers that the safety of vegetable fertilization in the low temperature season is the first priority, and those who don’t understand would rather not use it. Regardless of the weather, the vegetables in the shed should be ventilated every day. On cloudy days, small openings can be ventilated for half an hour around noon to eliminate harmful gases in the shed and avoid air damage. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone shockwave therapy,electromagnetic therapy machine,shock therapy machine,light wave therapy machine,electromagnetic wave therapy Shenzhen Guangyang Zhongkang Technology Co., Ltd. , https://www.nirlighttherapy.com
Prolong the closed time for top dressing