| abstract |
The present invention relates to the field of agricultural planting, in particular to a topdressing-free special organic-inorganic compound fertilizer suitable for corn under no-tillage and a preparation method therefor, which is characterized in that biosurfactants are applied to chemical fertilizers in the following parts by weight: 73.8-84.6 parts of chemical fertilizers (nitrogen, phosphorus and potassium fertilizers), 0-8 parts of biochar, 0-lO.l parts of wormcast‚ 6-8 parts of clay, and 0.05-0.3 parts of biosurfactants (dry basis). The compound fertilizer can meet the needs of corn growth without topdressing, promote early seedling emergence by 2-3 days, regulate plant growth and strong seedlings, inhibit the survival and reproduction of harmful microorganisms while enhancing drug resistance of seedlings, alleviate and gradually eliminate soil-bome diseases and insect pests as well as continuous cropping obstacles, and improve the yield and quality of corn under straw mulching, minimum tillage and no-tillage. |