Application method of microbial bacterial fertilizer for citrus;
1, heavy winter fertilizer
Before and after fruit picking, combined with deep tillage and soil improvement, microbial fertilizer is applied again, which has a significant effect on restoring tree vigor and promoting flower bud differentiation.
2. Apply spring fertilizer early
Applying biological bacterial fertilizer before the spring bud of citrus (from late February to early March) can greatly meet the demand of citrus growth for nitrogen and phosphorus fertilizer, strengthen seedlings, improve the quality of flower branches (increase the number and area of flower branches leaves), promote the normal germination of new shoots and supply nutrients needed for fruit growth.
3. Apply fruit fertilizer skillfully
Applying biological bacterial fertilizer in the middle and late May, which contains many trace elements such as nitrogen, phosphorus and potassium, can compensate the nutrients consumed by flowering, make young fruits get enough nutrients, reduce fruit dropping and improve fruit setting rate. However, it must be noted that the type, concentration and method of fertilization should be determined according to the growth of trees and the conditions of soil and weather. In dry season, water should be used first to keep the soil moist, and then fertilizer should be applied, which is beneficial to root absorption and achieves the effect of water and fertilizer promotion.
4. External fertilization
Exogenous fertilization is a topdressing method that directly permeates nutrients through stomata and cuticle of leaves, which has the advantages of quick effect and high absorption and utilization rate. In bud stage, flowering stage and young fruit stage, topdressing with water-soluble microbial inoculum outside the roots can improve the fruit setting rate and be beneficial to the growth and expansion of fruits.
The application of microbial bacteria in citrus can fully meet the needs of citrus for various nutrient elements, which is indispensable for citrus cultivation.