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%.
Periods The period of spraying micro-fertilizer 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 fertilizing 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, 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.
Time off in order to reduce the loss of fertilizer spraying process, which will help absorb the blades should be selected cloudy or sunny afternoon to evening spraying, fertilizer This extends the residence time of the solution on the leaves of vegetables, help to improve spray Apply the effect.
Mixed spray and micro-fertilizer mixed spray, or mixed with other fertilizers and pesticides, can save the process, play a "one spray multi-effect" role. 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.
Source: Science and Technology News of Qinghai: Chen Huajie
Periods The period of spraying micro-fertilizer 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 fertilizing 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, 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.
Time off in order to reduce the loss of fertilizer spraying process, which will help absorb the blades should be selected cloudy or sunny afternoon to evening spraying, fertilizer This extends the residence time of the solution on the leaves of vegetables, help to improve spray Apply the effect.
Mixed spray and micro-fertilizer mixed spray, or mixed with other fertilizers and pesticides, can save the process, play a "one spray multi-effect" role. 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.
Source: Science and Technology News of Qinghai: Chen Huajie
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