Soils can generally be divided into alkaline soil, neutral soil, and acidic soil. Neutral soil is suitable for most crop cultivation, while strong alkaline soil and strong acidic soil are not suitable for many plant growth, so effective measures need to be taken for improvement. Now briefly introduce the improvement methods of alkaline soil:
Key Points of Fertilization Techniques for Alkaline Soil
Firstly, when fertilizing alkaline farmland soil, attention should also be paid to increasing the application of decomposed organic fertilizers, decomposed farmhouse fertilizers, or straw returning to the field, as organic fertilizers and farmhouse fertilizers have the effect of regulating acidity and alkalinity. Long term use can play a good role in improving and repairing the soil, balancing soil acidity and alkalinity, and improving soil fertility.
Secondly, in alkaline farmland soil, fertilization can be combined with the use of base fertilizer (base fertilizer). Each acre is mainly composed of 40-50 kilograms of calcium sulfate gypsum (note that quicklime is used on acidic soil, pay attention to the difference), in order to increase soil acidity and reduce soil alkalinity through gypsum. After 2-3 years, when the soil is close to neutral or slightly acidic, it can be stopped.
Thirdly, when fertilizing alkaline farmland soil, not only should we avoid using alkaline fertilizers again (which can aggravate the soil's alkalinity), but we should also try to use as many acidic fertilizers as possible (using the acidity of fertilizers to gradually reduce the soil's alkalinity), such as using humic acid fertilizers, superphosphate, diammonium phosphate, potassium sulfate, calcium sulfate, ammonium sulfate, ammonium chloride, potassium chloride, ammonium nitrate, aluminum sulfate, etc Acid fertilizers such as ferrous sulfate (with fast effect but short alkali reducing validity period) and sulfur powder (with slow effect but long alkali reducing validity period).
Fourthly, when fertilizing alkaline farmland soil, attention should be paid to deep application methods such as hole application and ditch application for nitrogen fertilizer (especially ammonium bicarbonate), otherwise it is easy to cause a large amount of ammonia in nitrogen fertilizer to evaporate and lose nutrients;
Fifthly, alkaline soil can reduce the availability of phosphorus in the soil (phosphorus is easily fixed and lost by the soil), which can easily lead to phosphorus deficiency during crop growth. Therefore, in alkaline soil fertilization, attention should be paid to increasing the amount of phosphorus appropriately.
Sixth, crops grown on alkaline soil are prone to nutrient deficiency symptoms such as molybdenum, zinc, iron, boron, and manganese deficiency. Therefore, when planting crops on alkaline soil, it is recommended to timely use foliar fertilizers containing the above elements during crop growth to prevent nutrient deficiency from affecting crop growth and yield quality.
Seventh, when improving alkaline soil, people can also purchase alkaline soil amendments for use.
