Characteristics and Scientific Application Methods of Humic Acid Boron Fertilizer

Humic acid boron is a compound fertilizer made with humic acid as a carrier combined with the element boron, and belongs to the category of trace element fertilizers containing humic acid. It binds boron with humic acid through complexation or adsorption, so it can both supplement boron nutrition for crops and give play to the dual role of humic acid in improving soil and stimulating root growth.

In terms of nutrient characteristics, boron is one of the essential trace elements for crops and participates in cell wall formation, pollen germination and sugar transport. Fruit trees, rapeseed, cotton and many kinds of vegetables are relatively sensitive to boron. The active groups in humic acid molecules can adsorb and slowly release boron, reducing boron fixation or leaching loss in the soil, thereby improving the use efficiency of boron fertilizer. The combination of the two has both quick-acting and slow-release characteristics.

For application, humic acid boron can be used as a base fertilizer or topdressing, applied by furrow application or flushing, and can also be diluted for foliar spraying. Supplementing before and after the flowering period helps reduce flower and fruit drop and alleviate boron deficiency symptoms such as fruit corkiness. Sandy soils, plots with low organic matter content, and areas with more rainfall and stronger leaching are more prone to boron deficiency and can be supplemented as appropriate. It should be noted that excessive boron can also cause toxicity to crops. When applying, the dosage should be strictly controlled, direct contact between the fertilizer and seeds or young roots should be avoided, and it should be reasonably combined with major element fertilizers such as nitrogen, phosphorus and potassium to achieve better yield-increasing and quality-improving effects.