The invention discloses a method for preparing compound fertilizers capable of increasing the yield of yellow peaches. The method includes steps of mixing
biogas residues, waste from slaughter housesand tea seed
meal with one another to obtain first mixtures, adding EM (
effective microorganism) microbial agents into the first mixtures, carrying out hermetic
fermentation, adding
sucrose and
protease into
fermentation products, uniformly mixing the
sucrose, the
protease and the
fermentation products with one another to obtain second mixtures and allowing the second mixtures to hermetically stand still to obtain pre-prepared materials; mixing corn germ
meal and
hydrochloric acid with each other to obtain first mixtures, heating and stirring the first mixtures, filtering,
drying and cooling the first mixtures, adding
urea into the first mixtures to obtain second mixtures,
grinding and sieving the second mixtures, adding
oxalic acid and absolute ethyl
alcohol into the second mixtures to obtain third mixtures, carrying out
reflux stirring, distilling, and cooling on the third mixtures to obtain pretreated
urea; uniformly mixing the pre-prepared materials, the pretreated
urea, diaminoferric xanthohumate,
ammonium molybdate and
manganese humate with one another to obtain mixtures and granulating and
drying the mixtures to obtain the compound fertilizers capable of increasing the yieldof the yellow peaches. The method has the advantages that the compound fertilizers prepared by the aid of the method are long in
fertilizer efficiency and scientific in proportion, and requirements on various nutritional components can be met at the middle and late growth stages of the yellow peaches; the compound fertilizers are nontoxic, safe and reliable and are lasting in
fertilizer efficiency, and the obtained yellow peaches contain abundant
nutrition and have bright colors and luster, good taste and excellent colors.