It is more economical and effective to fertilize greenhouse vegetables by diluting the trace fertilizer and spraying the leaves of the vegetables. However, during the spraying process, you must pay attention to the following four points:
Concentration and concentration can receive good results. If the application concentration is too high, it is not only useless, but harmful. In general, 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 solution 0.2-1%.
General dosage of 40-70 kilograms of fertilization solution, so that the stems and leaves of vegetables is suitable.
Frequent application of leaf fertilizer is less, so it is difficult to meet the needs of the entire growth and development process at a time. Therefore, it should generally be based on the length of the growing period of vegetables, spraying 2-4 times is appropriate.
The time is to reduce the losses of trace fertilizers during the spraying process, which is beneficial to the absorption of leaves. Spraying should be performed in 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 improve the spraying effect. .
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