Biological organic fertilizer applied to Gannan red and yellow soil region and preparation method thereof

The present invention provides a method suitable for Gannan red, yellow soil area of ​​bio-organic fertilizer, according to the weight ratio of the ingredients comprising 30 to 50% of cow dung, 5.0 to 25% of microbial strains agent, 9.0 to 25% straw straw 0.1 to 6.0% zinc or zinc oxide and 6.0 to 25% magnesium oxide or magnesium salts. The present invention specifically for citrus cultivation in southern Jiangxi red, yellow soil area developed, the use of the advantages of bio-organic fertilizer to improve soil fast, replenish the soil organic matter, while the addition of a suitable southern Jiangxi crops require magnesium, zinc. Balanced fertilizer of the present invention, the timely supply of crop nutrients, better plant growth promoting Gannan region, to scientific fertilization effect. Especially in citrus planting process, one year after the adoption of the present invention, Gannan red, yellow soil area citrus orchards common magnesium deficiency, zinc deficiency symptoms disappeared, which effectively promote growth and improve the yield of citrus saplings grown citrus trees.