Harm of excessive alkalinity and acidity in orchid water

Raise orchids, there is an easy to ignore the problem, that is usually watering orchids with the PH value!

When some orchids find that the orchids are not growing well or withered, they often do so in terms of fertilizer and water, ventilation and light, diseases and insect pests, etc.

To find out the reason, the pH of the water is often ignored. According to the relevant materials and the practical experience of the Lan family.

The PH of orchid water should be 5.5-6.5. This is also a principle that orchid friends must follow.

I. what is the PH value.

PH value is the negative logarithm of hydrogen ion concentration in water. A PH value less than 7 is called acidic water, and a PH value equal to 7 is called neutral.

Water with a PH value greater than 7 is called alkaline water. The method of determining PH is very simple, mainly including A: stone core test paper and colorimetry.

Board. B:PH tester or pen.

Two. the harmful causes of excessive alkaline and acid use of water:

Orchids are suitable for growing in slightly acidic soil (plant material). That is, the PH value of 5.5 to 6.5 is appropriate! Too sour or too sour

Alkali is disadvantageous to the growth of orchids, and serious ones can lead to the death of orchids. Then the excessive acid or alkali of the plant water is

What will affect and harm orchids?

(1). If the water is too alkaline, that is, if the PH value is greater than 8, the following undesirable phenomena will occur:

1. If the water is too alkaline, the living environment of the orchid bacteria symbiotic with the fleshy root of the orchid will be bad, the reproduction will decline, and the orchid will be reduced.

The balance with blue bacteria has been disrupted. Causing orchids to grow poorly.

2: too alkaline water will reduce the availability of trace elements such as copper, zinc, manganese and iron in the matrix.

The root system is difficult to absorb, and orchids without nourishment of trace elements will lead to root growth obstacles and easy to die.

3: if the water is too alkaline, it is easy for the ammonia nitrogen in the matrix to form ammonia and volatilize.

Fertilizer, so that Langen can not get the proper nutrition and poor growth.

4: excessive alkaline water will make a large amount of phosphorus in the matrix easily combine with calcium and reduce the absorption of phosphorus by roots.

Take it. It hinders the growth of roots due to the increasingly serious lack of phosphorus.

(2). If the water is too acidic, that is, if the PH value is less than 5, the following undesirable phenomena will occur:

1: excessive acidity of water will improve the effectiveness of trace elements such as copper, zinc, manganese and iron in the matrix.

Flower root poisoning.

2: too acidic water will make the three elements in the matrix nitrogen, phosphorus, potassium and calcium, magnesium insoluble. Root system is absent

Law absorption, resulting in orchid plant hunger and premature senescence, yellowing.

3: the excessive acidity of water will make the phosphorus in the matrix easily combine with iron and reduce the activity, thus affecting the development of roots.

4: if the water is too acidic, the activity of nitrifying bacteria in the substrate will be reduced, which will limit the nitrification of ammonia nitrogen.

System, resulting in root poisoning, the resulting root is short and thick, and brown rot. Acidity less than PH 5

In the environment, blight, white silk disease and other acidophilic fungi are easy to multiply and cause disease.

If we understand the harm caused by excessive alkali and acid in water, we will pay attention to the determination of PH value of matrix.

(preferably measured once every 3 to 6 months), if it does not meet the requirements, the deviation should be corrected in time, so that the orchid plant has a suitable growth.

The environmental conditions.

For watering orchids, a lot of water used by Rain Water in the south can meet the requirements and avoid the harm of acid rain. With the rain in the north

When there is less water, Lanyou use more tap water (more groundwater) to water orchids, but the quality of tap water is mostly alkaline, so it is required.

The water can be treated with an appropriate amount of edible vinegar, hydrochloric acid, acetic acid, potassium dihydrogen phosphate (sodium) or lemon

Acid and other acids are mixed into the dried water to meet the requirements for watering, and can also adjust the PH value of the plant.

Often use citric acid to deal with PH value, the effect is very good. Of course, Rain Water is the best! PH value is less than 5, but

Add alkaline substances such as sodium bicarbonate, lime and so on to meet the requirements.