1) Concentration off. Appropriate spraying concentration can receive good results. In general, the suitable spraying concentration of various fertilizers is: boric acid or borax solution 0.05% to 0.20%, ammonium molybdate solution 0.02% to 0.05%, zinc sulfate solution 0.05 % ~ 0.20%, copper sulfate solution 0.01% ~ 0.02%, iron sulfate solution 0.2% ~ 1.0%.
2) Time off. The period of spraying fertilizer must be determined according to the vegetables and different types of micro-fertilizers, and it is generally appropriate to spray before flowering.
3) dosage. 667 m2 of fertilizer solution 40 ~ 75 kg, can make the stems and leaves of vegetables wet.
4) times off. Foliage spray generally uses less fertilizer, so it is difficult to meet the needs of the entire growth and development process. Therefore, it should be based on the length of the growing period of vegetables, spraying 2 to 4 times is appropriate.
5) Date is off. In order to reduce the loss of trace fertilizer in the spraying process, which is conducive to the absorption of leaves, it should be sprayed on a cloudy or sunny afternoon to late afternoon. This can extend the retention time of the fertilizer solution on the leaves of the vegetables and help to improve the spraying effect.
6) Mixed spray off. Mixed spraying of micro-fertilizers, or mixed spraying with other fertilizers and pesticides, can save the process and play a role of "a multi-effect". However, it is necessary to pay attention to clarifying fertility and medicinal properties when mixing, and if they are of opposite nature, they will interfere with each other and must not be mixed. All kinds of micro-fertilizers are not allowed to be mixed with alkaline fertilizers such as grass ash and lime, and zinc fertilizers cannot be mixed with superphosphate, and copper fertilizers must not be mixed with potassium dihydrogen phosphate solution.
2) Time off. The period of spraying fertilizer must be determined according to the vegetables and different types of micro-fertilizers, and it is generally appropriate to spray before flowering.
3) dosage. 667 m2 of fertilizer solution 40 ~ 75 kg, can make the stems and leaves of vegetables wet.
4) times off. Foliage spray generally uses less fertilizer, so it is difficult to meet the needs of the entire growth and development process. Therefore, it should be based on the length of the growing period of vegetables, spraying 2 to 4 times is appropriate.
5) Date is off. In order to reduce the loss of trace fertilizer in the spraying process, which is conducive to the absorption of leaves, it should be sprayed on a cloudy or sunny afternoon to late afternoon. This can extend the retention time of the fertilizer solution on the leaves of the vegetables and help to improve the spraying effect.
6) Mixed spray off. Mixed spraying of micro-fertilizers, or mixed spraying with other fertilizers and pesticides, can save the process and play a role of "a multi-effect". However, it is necessary to pay attention to clarifying fertility and medicinal properties when mixing, and if they are of opposite nature, they will interfere with each other and must not be mixed. All kinds of micro-fertilizers are not allowed to be mixed with alkaline fertilizers such as grass ash and lime, and zinc fertilizers cannot be mixed with superphosphate, and copper fertilizers must not be mixed with potassium dihydrogen phosphate solution.
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