Lawn ecosystems are artificial ecosystems, nutrient cycling, unlike its natural ecosystems that can be unlimited natural circulation, in its production and the pruning process more or less nutrient loss. Therefore, fertilizer is an important material basis in the process of turf production and cultivation. The correct fertilization under artificial control is an effective means to maintain the durability of the turf and maintain its good landscape to achieve sustainable development of the turf. The development of China's turf industry started late, and there are few studies on turf fertilization. Turf fertilization has not formed any norms in turf production. At present our country lawn production, basically still stuck in the no fertilizer or blind bias applied level. After Jianping, due to insufficient nutrition or imbalance, the resistance of turfgrass in the early stage of growth is poor, and the growth is poor and degraded in the later stage . It is necessary to rebuild or replant even in 2-3 years. Conventional turf fertilization is mostly one-time base fertilizer, top dressing or the same amount of fertilizer applied in the same time. Although the operation is simple, it does not meet the requirements of plant growth rhythm. The loss of excess fertilizer in the soil is also likely to cause soil compaction, and it will cause a lot of waste of fertilizer. Therefore, scientific fertilization has become an important management measure in the cultivation of lawn production. 1 Fertilizer is based on the dosage form of fertilizer and the fertilizer requirement of turfgrass. It is mainly based on nitrogen fertilizer, combined with potassium, phosphorus and other full-price fertilizers. The low-cultivation and management of the lawn, at least 0.5 kg / 100 square meters of nitrogen per year ( equivalent to urea 1.2kg / 100 square meters ); the highest can reach 5-7.5kg / 100 square meters ( equivalent to urea 11.1 - 16.7kg / 100) Square meters ) or more. The requirements for potassium and phosphorus in the turf are 1/2-1/3 and 1/5-1/10 of nitrogen, respectively . In addition, considering the difference of leaching and fixation between nutrients, the ratio of nitrogen to potassium: phosphorus is generally 2: (1-1.5): 1 (slow-release nitrogen as nitrogen 1/2). Re-seeding fertilizer can increase the amount of nitrogen fertilizer ; in order to improve the wintering and summer resistance of the lawn, the potassium and phosphorus dosage can be increased. At least once per year applying organic fertilizer, combined with smooth lawn earth ground. The application rate of organic fertilizer accounts for about 1/2 of the annual nitrogen application . Topdressing, applying topdressing on the basis of applying organic fertilizer and soil ; topdressing depends not only on grass species, but also on the use of lawns and the intensity of lawn regeneration and self-renewal reflected ; general green lawns, for the first time Look at the nitrogen and nutrient status of the climate and the lawn at specific times after returning to green.
　　 2 Fertilization methods are usually divided into four types : spraying, spreading, applying and applying . Liquid fertilizers and water-soluble silty fertilizers can be sprayed, and dry granules can be applied by spraying or dispensing. The fertilizer should be evenly distributed. For this purpose, the fertilizer can be applied in two directions . After fertilization, it should be watered in time to fully dissolve the fertilizer and promote the absorption of nutrients by the roots. 3 Fertilization time to see the nitrogen and nutrient status of the climate and the lawn. The cold season lawn is mainly in late summer, and the second fertilization is in the spring, which promotes the lawn to return to spring. The first season of fertilization in the warm season lawn is good in the late spring, and the second fertilization is in midsummer.
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About Escalators
Part of the urban landscape
Visit any large department store, shopping mall, metro station, airport or stadium anywhere in the world and you are sure to find escalators carrying people quickly and safely to their destination. The escalator has become an integral part of the urban landscape.
CEP Elevator Company has been safely and efficiently moving people for 20 years. CEP is the world`s leading manufacturer of elevators, escalators, moving walks and people movers. With 30,000 installations and operations in more than 89 countries, it`s safe to say that the world rides on CEP.
Finding a safer solution
Designing a safe transition point-where passengers step on and off the escalator-was one of the major problems in creating a successful moving stairway. A number of methods had been attempted before CEP solved the problem.
The pursuit of innovation
CEP, in its tradition of innovation, has continued to refine the escalator since it pioneered its introduction.
Safety, quality and reliability
CEP was founded on the principle of safety. Today, CEP has one of the best safety records in the vertical transportation industry. The company works constantly to improve the safety of existing products and to implement new, safer technologies. CEP emphasizes a corporate policy of [safety first" and implements standardized procedures to ensure that every installation and service task is performed the safest way every time.
The escalator today-an array of options
CEP wrote history with the introduction of the escalator in 1995. Today, it continues to improve the product through ongoing innovation.
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CEP Elevator Products ( China ) Co., Ltd. , https://www.zjsmartcommercialescalators.com