Greenhouse tomato spray fertilizer is square

According to the growth period of tomato, foliar fertilizer is used. In the early stage, the plant growth is relatively strong, and it is easy to grow. It is necessary to use foliar nutrients that control the growth of stems and leaves, such as potassium dihydrogen phosphate and compound fertilizer. As a result, the growth of plants at the beginning of the period began to weaken, and foliar nutrients that promote the growth of stems and leaves should be used to promote the preservation of leaves, such as spray Shibao and vigorous sources.

According to the weather, foliar fertilizer is used. In the cloudy day, the photosynthesis is poor, and the tomato sugar is easy to supply. At this time, the foliar fertilizer has better sugar-adding effect.

Regular application of calcium fertilizer Tomatoes require more calcium, and calcium deficiency is prone to umbilical rot. Therefore, in the tomato fruiting period, more calcium fertilizer should be sprayed, with an interval of 5 to 7 days.

Spraying foliar fertilizer should be combined with disease prevention Foliar spray fertilizer should be combined with pest control to reduce the number of spraying and reduce the humidity in the shed.

Spraying the foliar fertilizer The foliar fertilizer should be sprayed mainly on the back of the leaf, because the tomato stomata are mostly on the back of the leaf, so the absorption rate is high.

Appropriate amount of foliar fertilizer When the wound is infested, rinse off the excess fertilizer with water and increase the water content of the leaves to alleviate the damage of the leaves. When the soil water content is insufficient, watering is needed to increase the water content in the plant and reduce the concentration of fertilizer in the stems and leaves.

Author: Gu Youjiang
Source: Agricultural Science and Technology News

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