First, the type of fertilizer
1. Urea: Urea is a quick-acting nitrogen fertilizer with a nitrogen content of more than 45%, which is a common fertilizer for leaf fertilization.
2. Potassium dihydrogen phosphate: Potassium dihydrogen phosphate is a quick-acting phosphorus-potassium compound fertilizer, which contains 51.7% of phosphorus pentoxide and 34.6% of potassium oxide, which is easily absorbed by plants.
In the production of tea, urea and potassium dihydrogen phosphate are suitable for foliar application. Foliar spray fertilizer allows fertilizer to directly enter the tea tree to increase the deficiency of nitrogen, phosphorus and potassium nutrients under drought conditions, enhance photosynthesis and improve the resistance of tea trees to high temperature. ability. Promote the synthesis and accumulation of sugar, improve the quality of tea, and achieve the purpose of ensuring production and quality.
Second, the spraying method
1. Spraying time: The fertilization of tea leaves should have obvious effect at a certain suitable temperature. Generally, it is sprayed in the morning and evening and cloudy days, and the effect is better; sunny days should be selected before 10:00 am and 4:00 pm Spraying later, it can be sprayed all day in cloudy weather.
2, spraying concentration: tea leaf surface fertilization concentration is generally 0.3% -0.5% urea plus 0.2-0.4% phosphorus dinitrogen potassium mixed application, avoid excessive concentration, otherwise it will cause the leaves to dry, curl or even fall off, aggravating drought.
3, spraying method: tea leaf surface fertilization should be sprayed from the back of the spray to facilitate the absorption of tea trees; for the tea garden during mining, pay attention to only spray the leaves, do not spray on the fresh leaves to be harvested.
4. Picking interval: After spraying the foliar fertilizer, it is usually picked after 5-7 days to benefit the fertilizer and improve the quality of the tea.
1. Urea: Urea is a quick-acting nitrogen fertilizer with a nitrogen content of more than 45%, which is a common fertilizer for leaf fertilization.
2. Potassium dihydrogen phosphate: Potassium dihydrogen phosphate is a quick-acting phosphorus-potassium compound fertilizer, which contains 51.7% of phosphorus pentoxide and 34.6% of potassium oxide, which is easily absorbed by plants.
In the production of tea, urea and potassium dihydrogen phosphate are suitable for foliar application. Foliar spray fertilizer allows fertilizer to directly enter the tea tree to increase the deficiency of nitrogen, phosphorus and potassium nutrients under drought conditions, enhance photosynthesis and improve the resistance of tea trees to high temperature. ability. Promote the synthesis and accumulation of sugar, improve the quality of tea, and achieve the purpose of ensuring production and quality.
Second, the spraying method
1. Spraying time: The fertilization of tea leaves should have obvious effect at a certain suitable temperature. Generally, it is sprayed in the morning and evening and cloudy days, and the effect is better; sunny days should be selected before 10:00 am and 4:00 pm Spraying later, it can be sprayed all day in cloudy weather.
2, spraying concentration: tea leaf surface fertilization concentration is generally 0.3% -0.5% urea plus 0.2-0.4% phosphorus dinitrogen potassium mixed application, avoid excessive concentration, otherwise it will cause the leaves to dry, curl or even fall off, aggravating drought.
3, spraying method: tea leaf surface fertilization should be sprayed from the back of the spray to facilitate the absorption of tea trees; for the tea garden during mining, pay attention to only spray the leaves, do not spray on the fresh leaves to be harvested.
4. Picking interval: After spraying the foliar fertilizer, it is usually picked after 5-7 days to benefit the fertilizer and improve the quality of the tea.
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Size:
Outer Diameter: 1/8"-36"(10.3mm-914.4mm)
Wall Thickness: 1.0mm-20mm
Length: Random Length,SRL,DRL(4-14M)
Steel Grade:
A53 Gr. A, Gr B, A106 GR.A GR.B A333 GR1 GR3 GR6
End:pland ends beveled ends
Surface: Bare, Black,Lightly oiled, Hot dip galvanized,, Varnish coating/Anti rust oil, Protective Coatings, 3PE
Packing:Nude, Plastic/steel plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps.
| ASTM A53 /A106 Chemical Components and Machanical Property | |||||||||||||
| Standard | Steel Grade | Chemical Components | Machanical Property | ||||||||||
| C | Mn | P | S | Cu | Ni | Cr | Mo | V | Tensile Strength (Mpa) | Yield Strength(Mpa) | Elongation (Mpa) | ||
| ASTM A53 | A | ≤0.25 | ≤0.95 | ≤0.05 | ≤0.045 | ≤0.40 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.08 | ≥330 | ≥205 | ≥29.5 |
| B | ≤0.30 | ≤1.20 | ≤0.05 | ≤0.045 | ≤0.40 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.08 | ≥415 | ≥240 | ≥29.5 | |
| Standard | Steel Grade | Chemical Components | Machanical Property | ||||||||||
| C | Si | Mn | P | S | Cu ,Ni | Cr | Mo | V | Tensile Strength (Mpa) | Yield Strength(Mpa) | Elongation (Mpa) | ||
| ASTM A106 | B | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.08 | ≥415 | ≥240 | ≥30 |
| C | ≤0.35 | ≥0.10 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.08 | ≥485 | ≥275 |
≥30 |
|
Spiral Pipe,Carbon Steel Spiral Pipe,Spiral Steel Pipe,Galvanized Spiral Steel Pipe
HeBei GuangHao Pipe Fittings Co .,LTD (Cangzhou Sailing Steel Pipe Co., Ltd) , https://www.guanghaofitting.com