Effect of soil pH on Flowers

The pH value of soil is expressed by pH value. The pH value of 8.5 is strongly alkaline. If the soil pH is not suitable, it will hinder the absorption of nutrients by plants, because the acidity and alkalinity are related to the solubility of mineral salts. The availability of nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, iron, manganese, molybdenum, boron, copper and zinc in mineral nutrients varies with the acidity and basicity of soil solution.

Determination of soil acidity and alkalinity: take a small amount of culture soil, put it into a glass, add water according to the ratio of soil ∶ water = 1 ∶ 2, stir fully, and dip the clarification solution with litmus test paper or extensive pH test paper. The pH value can be known according to the change of the color of the test paper.

Adjustment of soil pH: when the acidity is too high, some lime powder can be mixed into the culture soil or the proportion of plant ash (rice chaff ash can also be increased). When the alkalinity is too high, an appropriate amount of aluminum sulfate (alum), ferrous sulfate (green alum) or sulfur powder can be added. The use of ammonium sulfate in the application of nitrogen fertilizer can also reduce the alkalinity of soil and increase its acidity. With fruit peel can also neutralize alkaline basin soil, apple peel and apple core soaked in cold water, often irrigated with this kind of water, can gradually reduce the alkalinity of basin soil.