Fertilizer Absorption and Fertility Dynamics of Celery
(2) Fertility requirements: The absorption of nutrients by celery during the whole growth period is consistent with the increase in biomass. The absorption dynamics of all nutrients are basically the same, showing an “S†curve. The autumn celery nutrition is also a nutrient-rich growth period. The peak period of absorption, that is, 68 to 100 days after sowing, the absorption of five elements of nitrogen, phosphorus, potassium, calcium, and magnesium accounted for more than 84% of the total absorption, of which calcium and potassium were as high as 98.1% and 90.7%. Among them, the highest amount of nitrogen was required, followed by calcium and potassium, and the least phosphorus and magnesium. The ratio of nitrogen, phosphorus, potassium, calcium, and magnesium is approximately 9.1:1.3:5.0:7.0:1.0. Generally 1000 kilograms of celery are produced. The absorption of nitrogen, phosphorus and potassium are 2.0 kg, 0.93 kg and 3.88 kg, respectively.
The relationship between mankind and chemical industry is very close, universal access to all aspects of life. In
modern life, chemical products can not be obtained almost anytime,
anywhere. From the material life such as clothing, food, shelter and
transportation to the spiritual life such as culture and art,
entertainment and so on, all require chemical products to serve them. Some chemical products play an epoch-making role in the history of human development. Their production and application even represent a certain historical stage of human civilization
In order to survive and develop, humankind has constantly struggled with nature and gradually deepened its understanding of the world around us, thereby grasping the ability to conquer nature and transform the world. After a long historical practice, human beings are better at using natural conditions and creating a rich material world for themselves. Activated carbon is a commonly used class of air purification materials, mainly used for adsorption of trace amounts of toxic gases in the air, ammonia, formaldehyde, benzene, non-polluting, non-toxic, no side effects.
best used for
1.Indoor air purification. After the bedroom decoration, we can place activated carbon to absorb harmful gases, you can also also put it in toilet to remove odors.2. Furniture purification. Put the activated carbon into the closet to remove strange smell, humidification and mildew; put it into the shoes which can remove odors and germs; put it into the refrigerator to prevent food cross-taste and pollution that keep food fresh .
3.Floor protection. When the floor is paved with activated carbon directly under the floor which can go to taste humidification, mildew and pest control, but also to avoid the floor deformation.
The mattress added activated carbon can absorb moisture, remove sweat and keep the bed clean; secondly, it can improve the health function of lumbar muscle strain for the elderly. Because it has infrared radiation with a certain temperature, human body has health effect when long-term use.
5.Put activated carbon into the car, it adsorb harmful gas inside the car and remove peculiar smell.
Used for pet cleaning to adsorb odor which is non-toxic, no side effects, and no harm.
7. Put the activated carbon next to the appliance to prevent electromagnetic damage.
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