The invention relates to the field of
crop compound fertilizers and specifically relates to a special-purpose controlled-release compound
fertilizer for planting peanuts in
dry land. The compound
fertilizer is prepared from the following materials in parts by weight: 30-35 parts of
organic fertilizer, 20-23 parts of
urea, 15-18 parts of monoammonium
phosphate, 8-10 parts of castor bean
meal, 12-15 parts of wheat
bran, 3-5 parts of leaves of
asparagus lettuce, 0.1-0.2 part of
liquid paraffin, 6-8 parts of
sodium alginate, 3-5 parts of
methyl cellulose, 1-2 parts of
sodium tripolyphosphate, 4-5 parts of
cinnamomum longepaniculatum leaf residue, 4-5 parts of eggshells, 1-2 parts of capsicin, 0.1-0.2 part of disodium
adenosine triphosphate, 4-6 parts of waste bittern, 1-3 parts of
sodium diacetate, 0.5-1 part of tween 80, 0.2-0.3 part of
nisin and 3-5 parts of auxiliaries. According to the controlled-release compound
fertilizer disclosed by the invention, an active adsorbent prepared by utilizing the materials such as wheat
bran, eggshells and the like,
organic matter fermentation liquor rich in
active ingredient, auxiliaries, and the like are mixed to prevent nutrients from invalid loss; meanwhile, a
film coating agent is utilized to realize
controlled release of
fertility to satisfy
fertility needs of crops at each growth stage, so that yield and quality of the crops are improved; moreover, a soil environment is not damaged after long-term use of the compound fertilizer.