Fertilizing greenhouse vegetables in winter is as economical as possible by diluting the micro-fertilizer and spraying the leaves of the vegetables. However, you should pay attention to the following five skills during the spraying process:
concentration. Too high a concentration is not only useless, but harmful. Generally speaking, the suitable spraying concentration of various micro-fertilizers is: boric acid or borax solution 0.05% to 0.25%, ammonium molybdate solution 0.02% to 0.05%, zinc sulfate solution 0.05% to 0.2%, copper sulfate solution 0.01%~ 0.02%, iron sulfate solution 0.2% to 1%.
period. 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.
Dosage. Generally, the fertilization liquid of 40 to 70 kilograms per mu can make the stems and leaves of vegetables suitable for dampness.
frequency. Blade spraying 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. In order to reduce the loss of micro-fertilizer during spraying, it is beneficial to the absorption of the leaves. It should be sprayed in the afternoon or evening when it is cloudy or sunny. This can prolong the residence time of the fertilizer solution on the vegetable leaves, which is beneficial to improve the 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.
concentration. Too high a concentration is not only useless, but harmful. Generally speaking, the suitable spraying concentration of various micro-fertilizers is: boric acid or borax solution 0.05% to 0.25%, ammonium molybdate solution 0.02% to 0.05%, zinc sulfate solution 0.05% to 0.2%, copper sulfate solution 0.01%~ 0.02%, iron sulfate solution 0.2% to 1%.
period. 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.
Dosage. Generally, the fertilization liquid of 40 to 70 kilograms per mu can make the stems and leaves of vegetables suitable for dampness.
frequency. Blade spraying 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. In order to reduce the loss of micro-fertilizer during spraying, it is beneficial to the absorption of the leaves. It should be sprayed in the afternoon or evening when it is cloudy or sunny. This can prolong the residence time of the fertilizer solution on the vegetable leaves, which is beneficial to improve the 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.
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