The invention provides a
humic acid type microalgae biological
organic fertilizer. The
humic acid type microalgae biological
organic fertilizer comprises mineral source
humic acid, composite effective viable
bacteria, composite microalgae seed
dry powder,
soybean meal and sesame cakes, the
mass ratio of the mineral source humic acid to the
soybean meal to the sesame-seed cake is (4.5-5): 1: 1, the invention also provides a preparation method of the
fertilizer, and the preparation method at least comprises the following steps: ammoniating the mineral source humic acid, respectively
grinding and crushing the
soybean meal and the sesame-seed cake, and mixing with the ammoniated mineral source humic acid; then adding composite effective viable
bacteria and a proper amount of water for composting
fermentation until the materials are thoroughly decomposed; and adding the composite microalgae seed
dry powder, uniformly stirring, granulating,
drying and screening to obtain the
fertilizer. The
fertilizer can be applied to soybean and rice crops, promotes growth of soybean and
rice root systems, helps the crops to better adapt to the environment under drought or
saline-alkali conditions, further effectively improves the yield by 20-30%, can improve the fertilizer and
water retention capacity of soil, can improve soil heavy
metal pollution, and promotes improvement of the soil environment.