Greenhouse vegetables spray micro-fertilizer should pay attention
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The period of spraying micro-fertilizer must be determined according to different vegetable varieties and different micro-fertilizer varieties, and it is generally suitable for flowering spraying.
The dosage is generally 40 to 70 kilograms of fertilization solution, which makes it possible to wet the stems and leaves of vegetables.
The number of blade sprays generally uses less 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 to 4 times according to the length of the vegetable growth period.
Time is to reduce the loss of micro-fertilizer during spraying, which is good for leaf absorption. It should be sprayed on cloudy or sunny afternoon to evening, which can prolong the residence time of fertilizer solution on vegetable leaves, which is beneficial to improve spraying effect. .
In addition, the dual effects of fertilizer efficiency and efficacy should be considered when mixing with pesticides. Generally speaking, all kinds of micro-fertilizers cannot be mixed with alkaline pesticides. When preparing a mixed spraying solution, generally, a micro-fertilizer is first formulated into an aqueous solution, and then other medicines and fertilizers are directly added to the prepared micro-fertilizer solution for dissolution.