The invention discloses a rice flower-promoting and rice-ear-protecting organic foliar
fertilizer containing biological
selenium and
zinc and a preparation method thereof. The rice flower-promoting and rice-ear-protecting organic foliar
fertilizer is characterized in that a
nutrient solution is prepared from the following raw materials in percentage by weight: 10% of
bone meal, 20% of onion leaves, 20% of oilseed rape residue, 10% of edible vinegar, 30% of water
hyacinth, 10% of
rhodospirillum extracting liquid and 0.1% of
fermentation flora I. The preparation method comprises the following steps: crushing the onion leaves and the oilseed rape residue, feeding the
fermentation flora I, performing high-temperature and high-speed
solid-state
fermentation and
decomposition for 24 hours, taking out a fermented product, then adding the
bone meal and edible vinegar for performing acetification, further adding water
hyacinth fermentation liquid and
rhodospirillum into acetified raw materials again and mixing and stirring uniformly.
Selenium and
germanium in the rice flower-promoting and rice-ear-protecting organic foliar
fertilizer disclosed by the invention exist in biological
enzyme modes, and the rice flower-promoting and rice-ear-protecting organic foliar fertilizer further contains active
small molecule peptides; therefore, when the rice flower-promoting and rice-ear-protecting organic foliar fertilizer is sprayed on leaves of rice in blooming and ear setting periods, the piece weight of ear setting grouting of the rice can be promoted, the occurrence of rice
aspergillus can also be prevented, the quality of products can be increased, and the function of reducing chalkiness degree can be achieved.