Ammonium nitrate and other nitrate-nitrogen fertilizers are generally not suitable for application to vegetables. When nitrate-nitrogen fertilizer is applied to vegetable fields, the nitrate content in vegetables will be multiplied. Nitrate is easily reduced to nitrite and nitrite in human body. It is a highly toxic substance that is extremely harmful to the human body. Ammonium chloride, potassium chloride and other chlorinated fertilizers are not suitable for application to tomatoes. After the chlorine-containing fertilizer is decomposed in the soil, ammonium or potassium ions are adsorbed by the soil or absorbed by the vegetables. When the concentration reaches a certain level, the roots of the vegetables will be Produces poison, which can cause serious vegetable death.
Leafy vegetables should be sprayed with nitrogen fertilizer, and the leaves of the vegetables should be sprayed with nitrogen fertilizer. After the ammonium ions are in contact with the air, they are easily converted into nitrate ions and absorbed by the leaves, and the leafy vegetables have a short growth period, which makes it easy to make nitric acid. Salt accumulates in the leaves, so avoid spraying nitrogen on the foliage of leafy vegetables.
The application of micro-fertilizers in vegetables can promote high-quality and high-yield vegetables, but the demand for trace elements in vegetables is extremely small. Excessive application of micro-fertilizer not only causes economic waste, but also is prone to poisoning and polluting the environment. Under normal circumstances, the amount of ferrous sulfate per acre should not exceed 3.25 kilograms, the monthly dosage of manganese sulfate and manganese chloride should not exceed 2.05 kilograms, the amount of copper sulfate should not exceed 2 kilograms per acre, and the amount of borax and boric acid per acre should not exceed 1.25 kilograms. .
Leafy vegetables should be sprayed with nitrogen fertilizer, and the leaves of the vegetables should be sprayed with nitrogen fertilizer. After the ammonium ions are in contact with the air, they are easily converted into nitrate ions and absorbed by the leaves, and the leafy vegetables have a short growth period, which makes it easy to make nitric acid. Salt accumulates in the leaves, so avoid spraying nitrogen on the foliage of leafy vegetables.
The application of micro-fertilizers in vegetables can promote high-quality and high-yield vegetables, but the demand for trace elements in vegetables is extremely small. Excessive application of micro-fertilizer not only causes economic waste, but also is prone to poisoning and polluting the environment. Under normal circumstances, the amount of ferrous sulfate per acre should not exceed 3.25 kilograms, the monthly dosage of manganese sulfate and manganese chloride should not exceed 2.05 kilograms, the amount of copper sulfate should not exceed 2 kilograms per acre, and the amount of borax and boric acid per acre should not exceed 1.25 kilograms. .
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Hitachi Elevator Spare Parts, Hitachi Elevator Parts
Hitachi has been developing and manufacturing elevators and escalators for about 90 years. Social demands on elevators and escalators changed dramatically over time: faster, larger, and barrier-free and required.
History of Hitachi's Elevator and Escalator Business
- 1924Lift manufacturing at the Kameido plant
- 1932First elevator delivered (to Tokyo Electric Power)
- 1937First escalator delivered (to Osaka Railway Department Store)
- 1956Hitachi Building Services Co., Ltd. founded (currently known as Hitachi Building Systems Co., Ltd.)
- 1966Hitachi Elevator Engineering Co ., (Hong Kong) Ltd. founded in Hong Kong
- 1967Construction of an elevator research tower in the Mito plant completed (90m in height)
- 1968300m â„ minute ultra high speed elevator delivered to the Kasumigaseki Building, Japan's first skyscraper
- 1972Hitachi Elevator Engineering (Singapore) Pte. Ltd. founded in Singapore
- 1974Delivery of 540m â„ minute elevators to skyscrapers in Shinjuku
- 1987Hitachi Mito Engineering Co., Ltd. founded
- 1991Siam-Hitachi Elevator Co., Ltd. Founded in Thailand
- 1998Three affiliated companies in China merged to found Guangzhou Hitachi Elevator Co., Ltd.
- 2003Opened Hitachi Building Solution Lab
- 2007Guangzhou Hitachi Elevator Co., Ltd. renamed to Hitachi Elevator (China) Co., Ltd.
- 2008Hitachi Lift India Pvt. Ltd. foundedDelivered the world's highest class ultra fast double deck elevators to the Shanghai World Financial Center
- 2009Introduction of the Company systems leads to the establishment of the Urban Planning and Development Systems Company
- 2010Completed elevator research tower [G1TOWER" (213m in height) for Mito WorksFounded Hitachi Elevator Asia Pte. Ltd. as a general elevators and escalators business company for the Southeast Asia, India, and Middle East regionsCompleted elevator research tower (172m in height) for Hitachi Elevator (Shanghai) Co. Ltd.
-
2011Founded Hitachi Elevator Philippines CorporationDelivered 600m â„ minute elevators to the Al Hamra Mixed-Use Complex in Kuwait.
Hitachi Elevator Spare Parts, Hitachi Elevator Parts
CEP Elevator Products ( China ) Co., Ltd. , https://www.zjelevatordoorsystem.com