It is economical and effective to fertilize greenhouse vegetables in winter to dilute the micronutrient fertilizer and then spray the vegetable leaves. However, during the spraying process, you must pay attention to the following five techniques:
concentration. If the concentration is too high, it is not only useless but harmful. In general, the suitable spraying concentration of various fertilizers is: boric acid or borax solution 0.05%-0.25%, 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%.
period. The period of spraying fertilizer must be determined according to different vegetable varieties and different varieties of micro-fertilizers, and it is generally appropriate to use spraying for flowering.
Dosage. General mu fertilizer solution 40 to 70 kilograms, can make the stems and leaves of vegetables wet.
frequency. The amount of fertilizer used for leaf spraying is generally less, so it is difficult to meet the needs of the entire growth and development process at one time. Therefore, it should generally be based on the length of the vegetable growth period, spraying 2 to 4 times is appropriate.
time. In order to reduce the loss of trace fertilizer in the spraying process, which is beneficial to the absorption of leaves, it should be sprayed in the cloudy or sunny afternoons from the afternoon to the evening. This can extend the residence time of the fertilizer solution on the leaves of the vegetables and help to improve the spraying effect.
In addition, the dual effects of fertilizer efficiency and drug efficacy should be considered when spraying with pesticides. In general, all kinds of micro fertilizers should not be mixed with alkaline pesticides. When preparing a mixed spraying solution, generally, a kind of micro-fertilizer is first formulated into an aqueous solution, and then other drugs and fertilizers are directly added into the prepared micro-manure solution according to the amount and dissolved.
concentration. If the concentration is too high, it is not only useless but harmful. In general, the suitable spraying concentration of various fertilizers is: boric acid or borax solution 0.05%-0.25%, 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%.
period. The period of spraying fertilizer must be determined according to different vegetable varieties and different varieties of micro-fertilizers, and it is generally appropriate to use spraying for flowering.
Dosage. General mu fertilizer solution 40 to 70 kilograms, can make the stems and leaves of vegetables wet.
frequency. The amount of fertilizer used for leaf spraying is generally less, so it is difficult to meet the needs of the entire growth and development process at one time. Therefore, it should generally be based on the length of the vegetable growth period, spraying 2 to 4 times is appropriate.
time. In order to reduce the loss of trace fertilizer in the spraying process, which is beneficial to the absorption of leaves, it should be sprayed in the cloudy or sunny afternoons from the afternoon to the evening. This can extend the residence time of the fertilizer solution on the leaves of the vegetables and help to improve the spraying effect.
In addition, the dual effects of fertilizer efficiency and drug efficacy should be considered when spraying with pesticides. In general, all kinds of micro fertilizers should not be mixed with alkaline pesticides. When preparing a mixed spraying solution, generally, a kind of micro-fertilizer is first formulated into an aqueous solution, and then other drugs and fertilizers are directly added into the prepared micro-manure solution according to the amount and dissolved.
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