Calcium fulvate fertilizer as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of fulvic acid fertilizers, and particularly relates to a calcium fulvic acid fertilizer as well as a preparation method and application thereof. The invention relates to a calcium fulvate fertilizer. The calcium fulvate fertilizer is prepared from modified lignin black liquor and calcium nitrate. The method comprises the following steps: modifying the lignin black liquor, and chelating the modified lignin black liquor and calcium nitrate to form the calcium fulvate fertilizer. Potting experiments show that the Pseudomonas aeruginosa has a strong promotion effect on key agronomic characters such as corn plant height and stem diameter, can effectively promote root growth, construct a strong nutrition absorption basis and finally efficiently convert photosynthetic products into plant biomass, and has important significance on high-quality and high-yield cultivation of main food crops such as corn.

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