1. The concentration of the spray is suitable to receive good results. Generally speaking, the suitable spraying concentration of various trace element fertilizers is: boric acid or borax solution 0.05% - 0.20%, ammonium molybdate solution 0.02% - 0.05% The zinc sulfate solution is 0.05%-0.20%, the copper sulfate solution is 0.01%-0.02%, and the iron sulfate solution is 0.2%-1.0%.
2. Period closure The period of spraying micro-element fertilizer must be determined according to the variety of vegetables and different trace element fertilizers. It is generally suitable for spraying before flowering.
3, the amount of application of 40 to 75 kg of fertilization of the soil, it is appropriate to wet the stems and leaves of vegetables.
4, the number of times Foliar spray generally use less fertilizer, so it is difficult to meet the needs of all growth and development processes. According to the length of the vegetable growth period, it is generally appropriate to spray 2-4 times.
5, time to choose the cloudy or sunny afternoon to spray in the evening, can extend the residence time of the fertilizer solution on the vegetable leaves, is conducive to improve the spraying effect.
6, mixed spray off the combination of micro-element fertilizer spray, or mixed with other fertilizers and pesticides, can save the process, play a "one spray multi-effect" role. However, all kinds of trace element fertilizers should not be mixed with alkaline fertilizers such as grass ash and lime. Zinc fertilizer should not be mixed with superphosphate. Copper fertilizer should not be mixed with potassium dihydrogen phosphate solution.
Total 1 | <First <Prev 1 Next> Last> |
share to: