Integrated technology of potato fertilizer

"Medicine-fertilizer integration" technology refers to an application technology that combines disease-prevention agents with foliar fertilizers and sprays at the same time in the potato disease prevention work. This technology is particularly effective for the prevention of early (late) potato blight. It has been widely used in northern China.

Principle of use: Fertilizer does not produce acid-base reaction,

Advantages: The combination of disease prevention and treatment and supplementary nutrition not only has good disease prevention effects, low cost of chemicals, saves the cost of mechanical operations, but also plays an important role in improving tuber quality, tuber yield and starch content.

The commonly used method is to mix protective agents with calcium magnesium borate, systemic fungicides, potassium dihydrogen phosphate and pesticides.

How to use the medicine-fertilizer integration technology:

1. First spraying: The time of the first spraying in production is often difficult to determine, and spraying should be performed on the basis of forecast based on the plant growth and development stage and climate conditions. In general, pesticides should be sprayed in the early stages of potato emergence, and premature susceptible varieties are even earlier.

2. The second spraying: the potato enters the bud stage, at this time the early blight enters the onset stage, and the application of 750g calcium borate magnesium fertilizer + 180g mancozeb zinc dispersing granule or 80g suspension agent per acre is continued to promote plant growth. After the machine enters the ground, it will cause damage to the ditch in the plot. Pay attention to fixing the lane when spraying the medicine to reduce the damage to other ditches and reduce the spread of germs.

3. The third spray: The potato has entered the flowering period, the plant has been fully opened, and it has begun to set potatoes, which requires higher fertilizer and water requirements. If the weather is dry, continue to use protective fungicides 1000g calcium borate magnesium fertilizer + 180g mancozeb zinc dispersible granules. In the event of continuous rainy weather, the epidemic will be epidemic, so the type of medicine should be changed. The medicine should be changed to the systemic fungicide cream urea cyanomanganese zinc, using calcium magnesium borate 1000g + 180g cream urea cyanomanganese zinc.

4. The fourth spraying: the potato enters the tuber-setting stage. At this time, the potato has high requirements on water and fertilizer, and the late blight also enters a high-incidence period. The type of chemical fertilizer is changed. Strengthen the prevention and control of late blight. If there is a pest, you can use it together with the insecticide. Test before use to see if a reaction will occur. If precipitation occurs after mixing, you cannot mix pesticides.

5. The fifth spraying: the tuber expansion period, at this time the potato has the highest requirements for water and fertilizer, and the number of fertilizers should be increased. The drug should be treated with frost urea manganese zinc zinc 2.5kg / ha + 200g potassium dihydrogen phosphate for the treatment of late blight.

6. The sixth and seventh spraying: the early-maturing potato enters the mature stage, and the late-maturing varieties are still in the stage of tuber swelling. At this time, the spraying of chemical fertilizer and fertilizer can be continued to increase the survival period of the plant to prevent potato infection of tubers. The ratio is: 200 g of potassium dihydrogen phosphate per acre + 200 g of carbazide manganese zinc + 180 g of enoyl zinc manganese. For the last acre, 180 g of dimethomorph manganese zinc and 200 g of potassium dihydrogen phosphate were used. Promote the aging of tuber potato peel and improve tuber storage resistance.

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