A Detailed Explanation of the Latest Key Points of Wheat Foliar Fertilization Techniques
Wheat is widely grown worldwide and is one of the three major grains; almost all of it is used as food, with a small portion used as feed. Foliar fertilization at the booting to full-heading stage of wheat can significantly extend leaf function and clearly increase yield. Below, let's take a look with the editor at the key points of wheat foliar fertilizer.
1. Master the spraying time
According to experiments, spraying fertilizer from the booting stage to the full-heading stage of wheat is the period with the best effect and can clearly increase yield. In addition, at noon on a sunny day, because the temperature is relatively high and evaporation is relatively large, the fertilizer utilization rate is relatively low, so it is best to choose a partly cloudy day or before 10 a.m. or at 4 p.m. on a sunny day for spraying fertilizer. If it rains within 24 hours after spraying fertilizer, try to spray once again after the rain. When spraying fertilizer, try to avoid the flowering stage, so as not to affect the normal pollination and fertilization of wheat and thereby reduce the seed-setting rate.
2. Determine the type of fertilizer to spray
The type and amount of fertilizer should be determined according to the seedling stage. Phosphorus and potassium elements can promote the synthesis and transport of nutrients in wheat, accelerate grain filling, and at the same time enhance the plant's lodging resistance; nitrogen fertilizer can improve grain quality and prevent premature senescence, but excessive application will cause excessive vegetative growth, which is not conducive to yield, so pay attention. For plants that are growing poorly or are overly vigorous, it is recommended to spray a 0.3% potassium dihydrogen phosphate solution; for thin and weak plants, an additional spray of 1%-2% urea solution can be applied; for plants with dark leaf color and vigorous growth, a wood ash extract can be sprayed, and foliar fertilizers such as Meizhouxing or fulvic acid can also be sprayed.
3. Spray evenly
The spraying method must also be appropriate. The fertilizer solution must be completely sprayed on the leaves, green stems and wheat heads, and at the same time both the front and back sides of the wheat leaves must be sprayed with the fertilizer solution. When spraying, spray evenly; the finer the droplets, the better. For wheat fields with severe fertilizer deficiency and poor soil moisture, or when dry hot wind occurs during the fertilizer spraying period, the number of fertilizer sprayings should be increased as appropriate.
4. Precautions
First, the variety of fertilizers mixed for use should not be too many. Do not put several foliar fertilizers together for application, and do not spray one kind today and another kind tomorrow. Foliar fertilizers do not have an cumulative effect, and too many types will also affect the exertion of the effect. Generally speaking, choosing 1-2 types according to local conditions is sufficient. Second, the timing of spraying must be well controlled; this has already been introduced above. Third, when spraying fertilizer, it must be fully dissolved and used immediately after mixing, avoiding strong light exposure or being washed away by rain. Fourth, potassium dihydrogen phosphate should not be mixed with alkaline pesticides such as lime sulfur mixture, Bordeaux mixture, etc., so as to avoid reactions that reduce fertilizer efficacy and pesticide efficacy.
The above is an introduction to the key points of wheat foliar fertilization. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.