Why is it alkaline potash fertilizer for burning leaves, and acid fertilizer for rotting?

Why is it alkaline potash fertilizer for burning leaves, and acid fertilizer for rotting? The reason why leaves become non-potassium fertilizer after decay is not that potassium disappears from thin air, but that potassium reacts with other substances to form components that cannot be absorbed by plants, i.e., potassium is fixed. Just like the sparkling ** in the encounter with aqua regia.

It does not disappear from thin air, but exists in another form.

1. The ash obtained by burning leaves is plant ash, which is called "fire manure" by the "wood engineer", and only mineral elements are left in the leaves, which is an important inorganic fertilizer. The decaying leaves retain most of the organic matter, i.e., organic fertilizer. The main components of vegetable ash are potassium-containing inorganic compounds.

Most of these inorganic compounds are strong bases and weak acids.

Salt, soluble in water to form an alkaline substance. When the leaves are burned, plant ash is formed, which mixes in the soil. When it comes across rainwater or water flow for irrigation, it dissolves in it. Sylvite.

Only when dissolved in water is it easily absorbed by plant roots. Therefore, burning fallen leaves is a good measure to improve soil fertility, because potassium plays an extremely important role in the normal growth of plants, making them strong and not easy to fall off.

2. In general, bacteria and other microorganisms prefer to live in a weakly acidic environment. The leaves are broken down into humus by microorganisms.

Humus is also an acidic substance. The difference between humus and plant ash is that the potassium element in plant ash.

It is easy to be directly absorbed by the root system after dissolving in water, but it takes a long time for the elements in humus that are conducive to plant growth to be absorbed and utilized by the plant root system, therefore, the nutrient use value of rotten leaves is relatively backward in time compared to burnt leaves.

3. However, in the long run, since the natural environment is dependent on decomposers to balance and accelerate the ecosystem.

After the decomposer breaks down the leaves into humus, the nutrients in the humus will take some time to be converted into substances usable to the plant, but its nutrients are more abundant than plant ash, that is, when time permits, when the leaves are broken down by the decomposer and mixed with the soil, they will have a stronger fertilizer effect on the land.

The process of burning leaves. When the leaves are incinerated, the organic matter in the leaves is oxidized and decomposed into carbon dioxide, water, and inorganic salts. The substance makes up what is commonly referred to as plant ash.

Plant ash is alkaline, and the main component of plant ash is an inorganic compound containing potassium. Most of these inorganic compounds are strong bases and weak salts, which are easily soluble in water and form alkaline substances. After the leaves are burned, the plant ash formed is mixed in the soil, rainwater or irrigation water, which can be dissolved in it, and potassium is only easily absorbed by the roots of the plant when it is dissolved in water, so burning the leaves is a good measure to improve soil fertility, because potassium plays an extremely important role in the normal growth of plants, it can make plants grow robust, and it is not easy to occur rooting.

Because the component of plant ash is potassium carbonate, which is soluble in water, it becomes alkaline; The decay of leaves produces acidic substances, so it becomes an acidic fertilizer.

The chemical mechanism of the two of them is different, and the reaction produced is also different, the burning of leaves into ashes is a chemical reaction, and the decay is a physical reaction.

This is due to the potassium content, and most of the inorganic compounds are strong bases and weak acids, which will occur when they encounter water.

This is due to the difference in the way the leaves are treated, and when the leaves are burned to ash, they react with oxygen in the process to form alkaline potash fertilizers. In the process of decay, because they are stacked together and fermented, three substances are produced.

The main component of plant ash is potassium-containing inorganic compounds, most of which are strong alkalis and weak salts, which are easily dissolved in water to form alkaline substances.

The leaves turn into plant ash is alkaline and rich in potassium, which promotes the rooting and germination of seeds and makes the soil alkaline. After the leaves are corrupted, they are decomposed by microorganisms into humic acid, so they become acidic.

I don't know much about the subject, but from the perspective of the knowledge we learned, when the leaves are burned into ash, they are alkaline, and then continue to decay and become acidic, the main component of this process is potassium nitrate, but when the plant ash rots, another hydrolysis reaction occurs, and the potassium hydroxide after the reaction is strongly alkaline, so the test is alkaline!

The leaves go from burning to ash to rotting, and their chemical properties change from alkaline to acidic because of a series of special chemical reactions.

Rotten leaves can be used as flower fertilizer.

Rotten leaves contain nitrogen, phosphorus and potassium.

and other trace elements.

If it is decomposed as fertilizer, it can supplement the deficiency of trace elements in the soil, and can also play a role in loosening the soil.

The method is simple:

Dig a pit about 30 cm deep, put the dry leaves into the pit, water it, you can mix some organic fertilizer or chemical fertilizer appropriately, water it to make the leaves soaked, and then bury it in the soil, which can become fertilizer for raising flowers after about six months.

Be careful not to bury it in the soil for too short a short time, as it can cause damage to the roots of the flower if it is not fully decomposed.