Introduction To The Application Tips Of Seaweed Fertilizer

In order to better improve the utilization rate of seaweed fertilizer, in addition to choosing a good brand and type, you can also start from the following directions:
1. The spray concentration should be appropriate. Within a certain concentration range, the speed and amount of nutrients entering the leaves increase with the increase in solution concentration. However, if the concentration is too high, fertilizer damage may easily occur, especially for trace element fertilizers, generally large and medium elements (nitrogen, phosphorus, potassium, calcium, magnesium, sulfur). The use concentration is 500 times to 600 times, and the use concentration of trace elements iron, manganese and zinc is 500 times to 1000 times.
2. The spraying time should be appropriate. When foliar fertilization is applied, the longer the wet time, the more nutrients the leaves absorb and the better the effect. Under normal circumstances, it is appropriate to keep the leaves moist for 30 to 60 minutes, so foliar fertilization is best done in the evening when there is no wind; spraying fertilizer in the morning when there is dew will reduce the concentration of the solution and affect the effect of fertilization. Foliar top dressing cannot be carried out on rainy days or before rain, because nutrients are easily lost by leaching and the desired effect cannot be achieved. If it rains 3 hours after spraying, re-spray once on sunny days, but the concentration should be appropriately reduced.
3. Spraying should be even, detailed and thoughtful. Foliar fertilization requires fine droplets and even spraying. Pay special attention to spraying the upper leaves with strong growth and the back of the leaves.
4. The number of sprays should not be too few, and there should be intervals. The concentration of crop foliar top dressing is generally low, and the amount absorbed each time is very small, which is much lower than the demand of the crop. Therefore, the frequency of foliar fertilization should generally not be less than 2 to 3 times. At the same time, the interval should be at least one week, and the number of sprays should not be too many to prevent harm.
5. Foliar fertilizer should be mixed properly. When applying foliar fertilizer, reasonably mixing two or more foliar fertilizers can save spraying time and labor, and the yield-increasing effect will be more significant. However, the fertilizer must have no adverse reactions or reduce the fertilizer efficiency after mixing, otherwise the purpose of mixing will not be achieved. In addition, when mixing fertilizer, pay attention to the concentration and pH of the solution. Generally, the pH value of the solution is around 7, which is beneficial to leaf absorption under neutral conditions.
6. Add wetting agent to the fertilizer solution. There is a layer of cuticle of varying thickness on the crop leaves, which makes it difficult for the solution to penetrate. For this reason, an appropriate amount of wetting agent and surfactant can be added to the leaf fertilizer solution to increase the surface tension, increase the contact area with the leaves, and improve the efficiency of the leaves. The effect of top dressing.
Finally, two points must be highlighted:
1. According to the results of a large number of field experiments, the effects of foliar fertilization are more likely to appear when plants are under conditions of growth factor stress (nutrition, climate, water).
2. Root fertilization is a fundamental fertilization measure, and extra-root fertilization is a auxiliary fertilization measure. We cannot put the cart before the horse.