Q: I have been using sprinkling irrigation to grow potatoes. I used urea when top dressing. I heard that the effect of urea ammonium nitrate solution is better than urea, but the liquid fertilizer is considered too expensive, then how to use it to increase production and income?
A: The urea ammonium nitrate solution is prepared from urea, ammonium nitrate and water. The three nitrogen sources are combined to exert the advantages of various nitrogen sources. Therefore, the application effect is significantly better than that of urea.
To replace urea with urea ammonium nitrate solution, we must first adjust the fertilization structure, base fertilizer as deep as possible, to maintain a longer period of fertilizer efficiency, fertilizer to reduce the amount of fertilizer. The general cultivation of potatoes needs topdressing about 20 kg of urea, the cost is about 30 yuan. After years of trial and demonstration, if the topdressing urea ammonium nitrate solution only needs about 5 kilograms, it can meet the potato growth needs, the cost is about 25 yuan, so that the growing cost will not increase. Pay attention to a small number of times in the application of liquid fertilizer, potato growth in the early stage of more nitrogen fertilizer, after budding to reduce the amount of nitrogen fertilizer, increase the supply of potassium fertilizer, boron fertilizer and zinc fertilizer, to achieve nutrient balance, to avoid the potato after the flower shoot long crazy , underground section of "potatoes." The rational and scientific application of liquid fertilizers will not only increase the planting costs, but also increase the income.
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