First of all, improper watering. In the hot summer season, watering too much, too much water, or excessive water control can lead to calcium deficiency in plants. Calcium is less mobile, and if the water is not properly watered, the capillary roots are injured and the calcium is difficult to absorb. If the water control is excessive, the soil is relatively dry, and the calcium in the soil cannot be absorbed, which easily leads to the lack of calcium.
Second, the temperature inside the shed is too high. The summer temperature is high. If the shading measures are not taken to cool down, once the temperature in the shed exceeds 32 °C, the stomata of the plant will automatically close and stop the transpiration. The absorption of calcium is mainly caused by transpiration, so the temperature is too high. While the plants are in the fruiting stage, it is easy to cause calcium deficiency.
Again, there is antagonism between the elements. Unreasonable use of fertilizer often leads to antagonism between elements. In the case of excessive use of an element, it inhibits the absorption of the other element by the root system, resulting in the emergence of vegetable deficiency syndrome. For example, excessive nitrogen (ammonium nitrogen) in the soil will inhibit the absorption of calcium by crops, and in the case of excessive nitrogen, it will also inhibit the absorption of potassium by plants, while potassium can promote the absorption of calcium, so it is easy to apply nitrogen fertilizer. Calcium deficiency.
How to avoid this happening? First, calcium is added in time on the basis of reasonable watering. Avoid soil over-drying and ensure that the roots normally absorb mineral elements. However, due to the poor mobility of calcium ions, it is not easy to be absorbed and utilized by crops. Therefore, many farmers' friends have reported that the effect of supplementing calcium fertilizer is not obvious. It is recommended that farmers' friends should supplement calcium fertilizer with foliar surface, choose good quality calcium fertilizer, and add naphthalene acetic acid when spraying calcium fertilizer. The effect is remarkable. Secondly, the sunshade net, spray cooling agent, splash mud, etc. are used to cool the sunshade. Again, reducing the amount of nitrogen fertilizer and properly supplementing the potassium fertilizer can promote the absorption of calcium. Finally, pay attention to root maintenance. If the root system is injured and causes calcium deficiency, then curing the root system is the root of prevention.
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