Determination of acidity and alkalinity of Flower cultivation Matrix

1. Judgment of acidity and alkalinity of cultivation substrate

1. Most of the slightly acidic soils are black, brown and brown-black, while the alkaline soils are white, gray and yellow.

two。 The acid soil seeps immediately after watering, and the water bleaches out of turbidity; when the alkaline soil is watered, it appears white bubbles or foams.

3. The acid soil is soft after watering; the alkaline soil is hardened and dries quickly, and there is a layer of white powder on the soil surface.

4. There are many aggregates in acidic soil, rice grains can be seen as soil grains, while alkaline soils are white sand, and the aggregate structure is few or invisible.

2. Determination of pH value of cultivation substrate

1. The rapid determination of pH value is usually used. The pH value determined is neutral when the pH value is 7, acidic when less than 7 and alkaline when more than 7.

two。 During the determination, you can buy a box of extensive pH acid-base test paper from the chemical reagent store, with a pair of standard colorimetric plates, which can be used for colorimetric determination.

3. During the determination, take a tablespoon of matrix soil sample, put it in a washed glass, add cold water (preferably neutral pure water) and stir. After precipitation, take a test paper and immerse it in the solution. After 1 second, take out the test paper and compare it with the standard colorimetric swatch. Find out the swatch number that is closest to the shade, and the pH value of the soil can be determined.