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How to use boron fertilizer
Boron plays a vital role in the transportation and metabolism of carbohydrates within plants. It supports the growth of plant meristems, enhances the development of vegetative and living tissues, accelerates early maturation, improves overall quality, and boosts the plant's resistance to environmental stresses. As an essential nutrient, boron is critical for healthy plant growth.
When rapeseed lacks boron, it often exhibits the "flowering without fruit" phenomenon, where flowers appear but do not develop into seeds. In celery, boron deficiency leads to "cracking stem disease," causing the stems to split and become unmarketable. In grapes, boron deficiency can result in uneven fruit size and discoloration, reducing both yield and quality. Similarly, radishes may suffer from internal browning when boron levels are insufficient.
Boron fertilizers are commonly available in the form of borax, also known as sodium tetraborate. It contains approximately 11% boron and appears as white, translucent, fusiform or glassy crystals. Borax is odorless and has a slightly salty taste. It tends to deliquesce when exposed to dry air and dissolves easily in water. The saturated solution of borax is slightly alkaline.
For application, borax is typically used as a base fertilizer at a rate of 7.5 to 10 kg per hectare. For seed soaking, a concentration of 0.02% to 0.05% is recommended, with seeds soaked for 4 to 6 hours before drying and sowing. For foliar application, a 0.1% to 0.2% borax solution is sprayed 2 to 3 times during the growing season, depending on the crop's needs.
Incorporating adequate boron into the soil and plant nutrition plan ensures better crop performance, higher yields, and improved resilience against various stress factors. Farmers should monitor their crops regularly and adjust boron applications based on soil tests and visual symptoms to maintain optimal plant health.