Foliar fertilizer is one of the important fertilizers needed for cucumber cultivation. What should you pay attention to when spraying cucumber foliar fertilizer? Let me introduce the precautions for spraying cucumber foliar fertilizer.
1. Foliar fertilizer with a lot of hormones should be used with caution. Leaf fertilizer contains a lot of hormones, which will cause premature aging of plants, lower yield and lower quality.
2. The use of foliar fertilizer is generally in the period of fruiting, and the nutrient is sufficient in the early stage. After the melon is grown, the reproductive growth is strong, and the required fertilizer is more. Moreover, at this stage, the temperature is lower, the root activity is poor, and the nutrient absorption capacity is reduced. To meet the needs of normal melon, the foliar spray fertilizer can supplement the plant. The nutrients needed.
3. Pay close attention to the changes of cucumber leaves, and timely add calcium, iron, zinc, boron and other elements to prevent the occurrence of deficiency syndrome.
4. In the low temperature season, if there is a stagnation of growth point, it is necessary to spray the 800 times liquid of No. 1 in a timely manner, or spray it with Yunda 120, Ai Duo, etc. to promote the normal growth of cucumber.
5. In the middle and late growth stage of cucumber, the plant grows weakly, and timely sprays 800 times of the harvest to prevent premature senescence of the plant.
6. Spray should be even, meticulous and thoughtful. Foliar spray fertilizer requires small droplets and uniform spraying. Pay special attention to spraying the upper leaves and the back of the leaves. Because the new leaves are faster than the old leaves and the back of the leaves, the absorption capacity is strong. Therefore, when foliar spray fertilizer, the front and back sides of the leaves should be sprayed, as carefully as possible.
7. Spray time should be appropriate. When foliar spray is applied, the amount of nutrients absorbed by the leaves is directly related to the length of time the solution is wetted. The longer the wetting time, the more nutrients are absorbed by the leaves, and the better the effect. In general, it is advisable to keep the blade wet time in the range of 30-60 minutes. Therefore, foliar spray fertilizer is best carried out in the windless weather in the evening. Spraying fertilizer in the morning with dew will reduce the concentration of the solution and affect the effect of fertilization. Foliar topdressing can not be carried out on rainy days or before rain, because nutrients are easily leached and cannot function as they should. If it rains 3 hours after spraying, it should be refilled once on sunny days, but the concentration should be appropriately reduced.
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