Virus-free fertilization and water management technology for virus-free potato
Non-polluted production should be based on the application of organic fertilizer, supplemented by chemical fertilizers, promote the use of biological fertilizers, and vigorously promote formula fertilization. Application of organic fertilizer can reduce nitrate content, but it must be noted that organic fertilizer needs to be fully decomposed; biological fertilizer can fix nitrogen in the air, activate mineral elements in soil, increase soil nutrient supply; compound (mixed) fertilizer supply Comprehensive, high utilization rate can reduce by-product pollution; formula fertilization is applied according to the shortage of soil required by crops, which can improve fertilizer utilization rate and reduce nitrate pollution caused by over-application of lost pollution or accumulation. According to the soil characteristics of the county and the fertilizer and water habits of the potato, the following pollution-free fertilization water technologies are recommended:
First, pollution-free fertilization
1, base fertilizer.
190-500 kg of fermented farmyard manure, 15:15: 40 kg of skill compound fertilizer, acupoint application.
2, mention seedlings fertilizer.
When the seedlings are unearthed to 80-90%, the quick-acting effect of raising seedlings, the application of thin and decomposed human feces and urine 1000-1500 kg plus urea 3 to 4 kg (the ratio is 5 kg of decomposed manure and urea 0.1-0) . Skilled kilograms plus 45 kg of water) (water and water do not touch the plant, the same below).
3, promote seedling fertilizer.
When the seedlings are high in size (about 15 days after emergence), the acre is used with 15:15:15 potassium sulfate compound fertilizer, 0 kg, potassium sulfate 7.510 kg, and water 1000-1500 kg. 4, sweet potato fertilizer.
In the bud period, the use of 15:15: 20-25 kg of potassium sulphate compound fertilizer, 10 kg of potassium sulphate and water planting.
5, foliar topdressing.
Foliar fertilizers such as 0.3% potassium dihydrogen phosphate or 1000 times plant power 2003 are used during the flowering period.
Second, water management
If the soil is dry under the next planting, you can fill the whole ditch water once, and drain the soil after it is wet; if it is dry after the next planting, the soil will be white, and the water will be “running horse waterâ€. After the surface is wet, drain the water and keep the soil moist. The seedlings are properly dry, generally no need to fill the water before the height of the seedlings is 15 cm; timely and timely watering after the clever centimeter to ensure the soil is moist (grab the bunch, loose hands); the potato block formation period is generally rainy, pay attention to drainage Stains, but in the dry season can be watered to a third of the height; 10 to 15 days before harvest stop watering.
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