Foliar fertilizer potassium nitrate when to fertilize the best?

Foliar fertilizer has the characteristics of labor-saving and convenient, so many people use it now. In order to get the best effect, foliar fertilizer is generally sprayed at the seedling stage, the initial flowering stage or the critical period of fertilizer demand in the middle and late stage. When is the best time to apply foliar fertilizer potassium nitrate?

The main results are as follows: 1. When the nutrient uptake through the root is limited, due to: root damage: disease and mechanical damage.

2. Unfavorable soil conditions:

3. Too wet (flooded and anaerobic environment), too cold and too dry.

4. Lack or excess of soil nutrients.

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

6. Salinization (cation competition).

7. When the nutrient supply of root system can not meet the peak of nutrient demand.

8. When the local nutrient requirements of crops may exceed their ability 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, it limits the transport of nutrients in the xylem and limits the transport of nutrients.

11. in order to restore the stress of leaves caused by night frost as soon as possible.

In general, foliar spraying of potassium nitrate is very beneficial to crops when it is confirmed that there is a demand for potassium nitrate and when the environment is conducive to foliar spraying of potassium nitrate, and foliar spraying of potassium nitrate is very beneficial to crops in one or more of the following situations.