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Redox reaction of nitric acid

Views:0     Author:Site Editor     Publish Time: 2021-03-16      Origin:Site

Nitric acid in nature is mainly formed by nitric oxide generated in thunderstorm days or nitrogen dioxide released from microbial life activities. Human activities also produce nitrogen oxides. There are many nitrogen oxides discharged from human pollution sources every year in the world, and these nitrogen oxides will also form nitric acid. The nature of nitric acid is not stable, so it cannot exist in nature for a long time, but the formation of nitric acid is a part of nitrogen cycle.


The nitrogen element in nitric acid molecule is high valence, so nitric acid has strong oxidability. Its reduction products vary with the concentration of nitric acid. Generally speaking, the higher the concentration of nitric acid is, the less the average number of electrons per molecule of nitric acid is. The reduction products of concentrated nitric acid are mainly nitrogen dioxide, while the diluted nitric acid is mainly nitric oxide. The thinner nitric acid can be reduced to nitrous oxide, nitrogen, ammonium nitrate, etc. It should be pointed out that the above is only the dominant product. In fact, with the reaction going on, the concentration of nitric acid gradually decreases, and all reduction products may appear.

 

How to use potassium nitrate as foliar fertilizer?

Foliar fertilizer is labor-saving and convenient, so many people are using it now. In order to get the best effect, foliar fertilizer is usually applied in the seedling stage, the initial flowering stage, the middle and later period when fertilizer is needed. Now I will tell you when the foliar fertilizer potassium nitrate should be sprayed?

 

Spraying time of foliar fertilizer potassium nitrate:

 

1. When the nutrient intake through the root system is limited, because: root damage: disease and mechanical damage.

2. Unfavorable soil conditions:

3. Over wetting (flooded and anaerobic environment), over cooling and over drying.

4. The soil nutrient is insufficient or surplus.

5. Nutrient fixation (fixation of potassium by clayey soil).

6. Salinization (cation competition).

7. When the root nutrient supply cannot meet the peak nutrient demand.

8. When the local nutrient demand of crops may exceed the ability of plants to redistribute nutrients

9. When the local nutrient demand near the big fruit and ear is high.

10. When flowering is earlier than leaf spreading, the nutrient transport in xylem is limited and nutrient transport is limited.

11. In order to recover the stress of leaves caused by night frost as soon as possible.

 

In general, the application of potassium nitrate is very beneficial to crops when it is confirmed that crops have potassium nitrate demand, when the environment is conducive to the application of potassium nitrate on the leaf, and when one or more of the following conditions exist, the application of potassium nitrate on the leaf is very beneficial to crops.

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