The high energy from short wavelength UVC light is absorbed in the cellular RNA and DNA, damaging nucleic acids and preventing microorganisms from infecting and reproducing.
This absorption of UVC energy forms new bonds between nucleotides, creating double bonds or dimers." Dimerization of molecules, particularly thymine, is the most common type of damage incurred by UVC light in microorganisms.
Formation of thymine dimers in the DNA of bacteria and viruses prevents replication and ability to infect.
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First, the fertilization standard
At present, the content of potassium in the soil can only meet the demand of 100-125 kg of dried pepper per mu under normal conditions. To increase the yield of dried pepper by 100-150 kg, it is necessary to use pure potassium 5.25 kg, equivalent to 13.2 kg of potassium sulfate. The utilization rate of potassium sulfate is only 40%-50%. Therefore, the actual application amount of mu in production should be 20-25 kg. According to this, for the field of 250 kg of dried pepper per mu, 20-25 kg of potassium sulfate should be applied per mu, 20-25 kg of urea, 20 kg of diammonium phosphate, and 1000-2000 kg of farmyard manure as base fertilizer.
Second, the fertilization period
50% potassium sulphate and urea, diammonium in the pepper seedlings about half a month before transplanting into the planting belt ditch, and timely covering soil as a base fertilizer; the remaining 50% of potassium sulfate, urea and diammonium after the wheat harvest When the line is used as a top dressing.
Third, the growing season foliar spray fertilizer
Foliar spraying can be carried out with urea plus potassium dihydrogen phosphate or biological potassium fertilizer during the bud and knot phase of the pepper. Spraying concentration: 1% urea and 0.5% potassium dihydrogen phosphate. The specific operation is: 15 grams of water per 100 grams of urea, 50 grams of dipotassium phosphate. Spray 42-45 kg of fertilizer liquid per acre; pay attention to the sunny day at 10-12 am or 4-6 pm when spraying; spray evenly on both sides of the blade; the effect of spraying at intervals of 7-10 days is better.
Potassium enhances photosynthesis of crops and plays an important role in the metabolism, synthesis and transportation of carbohydrates. It not only improves the yield of peppers, but also improves quality. In the absence of potassium, the formation and knot angle of the flower are reduced first, and then the pods become smaller, thinner, and even reduced in number. In severe cases, the pepper is resistant to drought and disease resistance. According to my test and large-area demonstration in Qinghua Town, Daishan County, Shaanxi Province from 1997 to 2000, 25 kg of potassium sulphate was added to the mu, and 47 kg of dried pepper was added. The calculation was based on 6 yuan per kilogram of dried pepper, increasing the yield by 20.5%. Yuan, the input-output ratio is 1:14. Therefore, it is necessary to change the old concept that only pays attention to the input of nitrogen and phosphorus fertilizers and ignores the potassium fertilizer.
First, the fertilization standard
At present, the content of potassium in the soil can only meet the demand of 100-125 kg of dried pepper per mu under normal conditions. To increase the yield of dried pepper by 100-150 kg, it is necessary to use pure potassium 5.25 kg, equivalent to 13.2 kg of potassium sulfate. The utilization rate of potassium sulfate is only 40%-50%. Therefore, the actual application amount of mu in production should be 20-25 kg. According to this, for the field of 250 kg of dried pepper per mu, 20-25 kg of potassium sulfate should be applied per mu, 20-25 kg of urea, 20 kg of diammonium phosphate, and 1000-2000 kg of farmyard manure as base fertilizer.
Second, the fertilization period
50% potassium sulphate and urea, diammonium in the pepper seedlings about half a month before transplanting into the planting belt ditch, and timely covering soil as a base fertilizer; the remaining 50% of potassium sulfate, urea and diammonium after the wheat harvest When the line is used as a top dressing.
Third, the growing season foliar spray fertilizer
Foliar spraying can be carried out with urea plus potassium dihydrogen phosphate or biological potassium fertilizer during the bud and knot phase of the pepper. Spraying concentration: 1% urea and 0.5% potassium dihydrogen phosphate. The specific operation is: 15 grams of water per 100 grams of urea, 50 grams of dipotassium phosphate. Spray 42-45 kg of fertilizer liquid per acre; pay attention to the sunny day at 10-12 am or 4-6 pm when spraying; spray evenly on both sides of the blade; the effect of spraying at intervals of 7-10 days is better.
Potassium enhances photosynthesis of crops and plays an important role in the metabolism, synthesis and transportation of carbohydrates. It not only improves the yield of peppers, but also improves quality. In the absence of potassium, the formation and knot angle of the flower are reduced first, and then the pods become smaller, thinner, and even reduced in number. In severe cases, the pepper is resistant to drought and disease resistance. According to my test and large-area demonstration in Qinghua Town, Daishan County, Shaanxi Province from 1997 to 2000, 25 kg of potassium sulphate was added to the mu, and 47 kg of dried pepper was added. The calculation was based on 6 yuan per kilogram of dried pepper, increasing the yield by 20.5%. Yuan, the input-output ratio is 1:14. Therefore, it is necessary to change the old concept that only pays attention to the input of nitrogen and phosphorus fertilizers and ignores the potassium fertilizer.
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