In the plastic greenhouse, around 9 am, the CO2 concentration in the greenhouse is only 110 to 130 ppm, which is only 1/15 of the optimum photosynthetic concentration of vegetables. The greenhouse CO2 fertilization method is as follows:

1. Diluted with concentrated sulfuric acid. Place a porcelain urn outside the shed, add 3 to 4 parts of water to the vat, and then slowly add 1 part of concentrated sulfuric acid to the tank. Stir it with a wooden stick and apply it after cooling the solution in the vat.

2. Prepare a large plastic bucket for every 10 square meters in the shed. The bucket should be more than 25 cm above the ground, and each bucket should be filled with dilute sulfuric acid; the liquid level should be about 1/3 of the bucket height.

3. Dosage. According to different types of vegetables, the stage of growth and the number of areas actually controlled in each barrel, it is determined that ammonium bicarbonate should be added to each barrel every day. Appropriate dosage is: cucumber, pepper flowering to the harvest period of 8 to 11 grams per square meter, seedling to flowering before the 5 to 8 grams per square meter; tomato, watermelon flowering to the harvest period per square meter dosage of 7 to 10 Grams, 3 to 5 grams before seedling to flowering; celery, leeks and other leaf vegetables from the leaf coverage rate of more than 95% of the start, the amount of 13.5 to 20 grams per square meter.

4. Application time; seedbed application is 1 to 2 weeks before colonization, and field is 15 to 25 days after colonization. Apply every morning after the curtain or half an hour after sunrise, once a day.

5. Application method: Wrap the well-prepared ammonium bicarbonate in paper or plastic bag, and put a few holes in the bag and put it into a plastic bucket together. After a period of application, ammonium bicarbonate is added to the barrel. If no bubbles are released, the reaction between ammonium bicarbonate and sulfuric acid is complete and dilute sulfuric acid must be replaced. The waste liquid is an ammonium sulfate aqueous solution (containing 25 to 31% of ammonium sulfate) that can be diluted for recovery.

Another method is to directly use the liquefied carbon dioxide recovered by the winery as a fertilizer source. Each greenhouse uses a steel cylinder (about 500 yuan in investment). A pressure reducing valve is attached to the steel cylinder, and a plastic pipe with a diameter of about 8 mm is connected to the outlet. The plastic pipe is laid in the center of the shed, and a hole is drilled every 1 to 1.2 meters. The cylinder switch is opened every day when it is applied, and the outlet pressure switch is adjusted to 1.2 to 1.5 atm. The metering is performed according to the actual application area. This method is suitable for better economic conditions and there is a winery application near the CO2 recycling workshop.

Matters needing attention: rain, snow, cold weather, cloudy days; temperature is less than 12 °C do not apply, cloudy days may apply less. Do not arbitrarily increase the dose, and do not use it in the afternoon or evening.

End milling cutter For CNC Key cutting Machine aftermarket

key milling cutters for CNC key making machine

Product Features

1.Material: Top quality, high hardness and high wear-resistant carbide, ultra-fine particles, good wear resistance;

2. Manufacturering process: 5-axis automatic grinding center for mirror grinding, sharp edge, low noise; side fixed plane adopts full grinding process, compact installation.

3.Quality: The roundness of the handle is 0.002mm, which greatly reduces the blade yaw during high-speed rotation.

4. Features: accurate size, cutting edge size accuracy of 0.005mm, cutting key size precision; sharp edge

5.Advantages: Specially tested in 994 machine, sharp, can cut brass key and nickel silver key, test Honda original keys, STRATTEC key blanks, smooth edge, no burr, continue to use after processing 200 keys;

6. The Electronic key machine carbide tracer point has good conductivity, ensuring accurate detection, and will not damage the accuracy of the fixture and the spindle.

Suit for processing keys:All inner milling slots and outer milling slot keys, suitable for processing nickel silver keys, which can efficiently process original and high-hardness key blanks, such as Honda original keys, STRATTEC key blanks, etc.

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