Peanut fertilization technology
The fertilization amount of peanuts in the whole reproductive cycle is 250-300 kg of commercial organic fertilizer, 8-11 kg of nitrogen fertilizer, 4-6 kg of phosphate fertilizer, and 7-8 kg of potassium fertilizer. Organic fertilizer is used as base fertilizer, nitrogen and potassium fertilizer are divided into base fertilizer and topdressing twice.
Base fertilizer: 250-300 kg of organic fertilizer per mu, urea 9-8 kg of diammonium phosphate 9-13 kg, potassium chloride 6-7 kg, zinc-deficient soil can be applied 1-2 kg of zinc sulfate per mu, boron-deficient soil The borax can be applied 0.25-0.5 kg per mu, and the molybdenum fertilizer can be soaked with 0.2-0.35% ammonium molybdate solution. Acidic soil can be used for 25-50 kg of slaked lime per acre, and 5-7.5 kg of raw gypsum powder per acre of alkaline soil.
Top dressing: Under the condition of insufficient base fertilizer, the top dressing can be properly topdressed. From the flowering stage to the drum stage, the top dressing should be carried out according to the growth trend. Generally, 8-11 kg of urea and 7-8 kg of potassium chloride are applied.
Top dressing: After the peanuts are needled, the 2%-3% aqueous solution of superphosphate can be sprayed 2-3 times for 7-10 days. If the flower grows weakly, 100-200 grams of urea can be added. Cooperate with spraying. For zinc-deficient and boron-deficient soils, 0.1%-0.2% zinc sulfate or borax aqueous solution may be sprayed from the seedling stage to the initial flowering stage in the absence of zinc and boron in the base fertilizer, and sprayed continuously for 2-3 times.
1.cylindrical milling cutter
Used for processing flat surfaces on horizontal milling machines. Cutter teeth are distributed on the circumference of the milling cutter, and are divided into straight teeth and spiral teeth according to tooth shape. According to the number of teeth and coarse teeth and two kinds of fine teeth. The helical tooth rough tooth milling cutter has fewer teeth, high tooth strength and large chip space, which is suitable for rough machining. Fine-tooth milling cutters are suitable for finishing.
2. face milling cutter
Also known as disc milling cutter, used for vertical milling machine, end milling machine or gantry milling machine processing plane, end face and circumference have cutter teeth, also have coarse teeth and fine teeth. The structure has three kinds: integral type, insert type and transferable type.
3. End milling cutter
Used for processing grooves and step surface, knife teeth in the circumference and end face, can not work along the axial feed. When the end mill has end teeth through the center, axial feed can be provided.
4. Three-side edge milling cutter
Used for processing all kinds of grooves and steps, its two sides and circumference are provided with cutter teeth.
5. Angle milling cutter
For milling grooves at a certain Angle, there are two kinds of single Angle and double Angle milling cutters.
6.Saw Blade milling cutter
Used for machining deep grooves and cutting off workpieces, there are more cutter teeth on the circumference. In order to reduce the friction during milling, there are 15 '~1° auxiliary Angle on both sides of the cutter teeth. In addition, there are keyway milling cutters, dovetail slot milling cutters, T - shaped slot milling cutters and various forms of milling cutters.
End Mill,Roughing End Mill,Carbide Square Drill Bit,Coating Machine Tools
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