The concentration is suitable to receive good results, and the application concentration is too high, which is not only useless, but harmful. Generally speaking, the suitable spraying concentration of various micro-fertilizers is: boric acid or borax solution 0.05%-0.2%; ammonium molybdate solution 0.02%-0.05%; zinc sulfate solution 0.05%-0.2%; copper sulfate solution 0.01%- 0.02%; iron sulfate solution 0.2%-1%.
The period of spraying the micro-fertilizer during the period must be determined according to different vegetable varieties and different micro-fertilizer varieties, and it is generally appropriate to spray before flowering.
The dosage is 40-75 kilograms of a fertilization solution, which makes it possible to wet the stems and leaves of vegetables.
The number of times of foliar application is generally less than the amount of fertilizer used, so it is difficult to meet the needs of all growth and development processes at one time. Therefore, it is generally appropriate to spray 2-4 times according to the length of the vegetable growth period.
The time is to reduce the loss of micro-fertilizer during the spraying process, which is beneficial to the absorption of the leaves. It should be sprayed on the cloudy or sunny afternoon to the evening, which can prolong the residence time of the fertilizer solution on the vegetable leaves, which is beneficial to increase the spray. Apply the effect.
Mixed spraying between micro-fertilizers and mixed with other fertilizers and pesticides can save the process and play the role of “one spray and multiple effectsâ€. However, when mixing, pay attention to clearing the fatness and medicinal properties. If the properties are opposite, they are mutually obstructive and must not be mixed. All kinds of micro-fertilizers should not be mixed with alkaline fertilizers such as grass ash and lime; zinc fertilizer should not be mixed with super-calcium phosphate; copper fertilizer should not be mixed with potassium dihydrogen phosphate solution.
The period of spraying the micro-fertilizer during the period must be determined according to different vegetable varieties and different micro-fertilizer varieties, and it is generally appropriate to spray before flowering.
The dosage is 40-75 kilograms of a fertilization solution, which makes it possible to wet the stems and leaves of vegetables.
The number of times of foliar application is generally less than the amount of fertilizer used, so it is difficult to meet the needs of all growth and development processes at one time. Therefore, it is generally appropriate to spray 2-4 times according to the length of the vegetable growth period.
The time is to reduce the loss of micro-fertilizer during the spraying process, which is beneficial to the absorption of the leaves. It should be sprayed on the cloudy or sunny afternoon to the evening, which can prolong the residence time of the fertilizer solution on the vegetable leaves, which is beneficial to increase the spray. Apply the effect.
Mixed spraying between micro-fertilizers and mixed with other fertilizers and pesticides can save the process and play the role of “one spray and multiple effectsâ€. However, when mixing, pay attention to clearing the fatness and medicinal properties. If the properties are opposite, they are mutually obstructive and must not be mixed. All kinds of micro-fertilizers should not be mixed with alkaline fertilizers such as grass ash and lime; zinc fertilizer should not be mixed with super-calcium phosphate; copper fertilizer should not be mixed with potassium dihydrogen phosphate solution.
Article source: Qinghai Science and Technology News
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