A group from College of Environment, Zhejiang University of Technology, Hangzhou 310032, China, etc. has reported that Humic acid could be a good organic fertilizer in greenhouse-planted cherry tomato.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9434616/
Due to the adverse effects of chemical fertilization on greenhouse soils, nowadays, special attention has been paid to organic and biological fertilizers or those technical managements that avoid soil fertility reduction in greenhouses. Humic acid is a component of humus, and it is also a natural component and contributes toward the reduction of the diseases and stresses and increase of the crop yield. Actually, several studies have shown that Humic acid application in vegetable production can improve the primary and secondary metabolism of plants, increase crop yields and quality, and decrease pests and diseases. Humic acid can accelerate soil organic material decomposition by increasing the microbial activity in soil. Furthermore, Humic acid can also alter the root exudation profile by affecting the plant metabolism and thus influence the structure of the rhizosphere microbial community. Principal coordinate analysis of the bacterial communities revealed that control, Humic acid application, and organic fertilizer formed different clusters.
where, humic acid (HA), farmyard manure (FM), commercial organic fertilizer (COF), and control check (CK)