Planting blueberries requires that the pH value of the soil is 4 ~ 5.5, so as to ensure that the soil is acidic, the soil organic matter content is 8% ~ 12%, and the soil is loose, well ventilated, moist and without water accumulation.

Domestic papers agree that blueberry is a calcium-loving plant and calcium-containing fertilizer is not suitable for application. American blueberry planting books all indicate that calcium fertilizer should be applied in autumn. The traditional blueberry producing areas in China are all in Northeast China and North China, and the calcium content in soil is much higher than that in blueberry plants (below 0.8%), which means that there is excess calcium, which restricts the growth.

It is reported that the pH value of soil should be monitored at any time. Calcium and magnesium in irrigation water will continuously increase the pH value of soil, so acid fertilizers such as cotton meal should be used. In addition, when the organic matter content is rich, it is not a big problem when the pH reaches 6. When necessary, soluble sulfur can be applied through drip irrigation. Vinegar and citric acid can also be used for drip irrigation to lower the pH value. ..

Reprinting management points: 1, soil pH value is between 4.5 and 5.5, so as to maximize the yield; 2. Blueberries like ammonium nitrogen (NH4); 2. 1, using ammonium sulfate and urea; 2.2. Do not use ammonium nitrate or calcium nitrate. Applying too much nitrate will burn trees, which is "waste"; 3. If the soil pH is lower than 5.0, do not use fertilizer containing ammonium sulfate. Urea or a mixture of urea and a small amount of ammonium sulfate (urea -sul urea ammonium sulfate) can be used to minimize the pH value; 4. One-time application of urea over 65438 000 pounds per acre will cause temporary iron deficiency (pulse yellowing); 5. In the year of planting, if sawdust is not covered, the total amount of fertilization should not exceed 50 pounds to 60 pounds of nitrogen per mu. Excessive nitrogen, burning roots and leaves; 6. Don't use fresh horse manure and shavings as nitrogen sources, because the pH value of these materials is too high; 7. Granular nitrogen fertilizer is applied three times a year, one third each time, from spring to early summer; 8. Never apply nitrogen fertilizer after harvest. 9. Regularly monitor soil pH value; 10, after blueberry planting, if you want to reduce the pH value of the soil, and it is too slow to apply ammonium sulfate to reduce the pH value, use sulfur. In order to avoid damaging trees, when applying sulfur, the dosage should not exceed 200 to 300 pounds per acre. 1 1. If the pH value is too low, lime should be applied in autumn. Don't apply lime in spring. Note that it takes a long time to change the pH value of the root zone when lime is applied to the soil surface. Monitor soil pH value to avoid problems; 12. If lime or other alkaline substances are not applied to blueberry fields, the pH of the soil will never increase.