Fertilization time in winter Winter fertilizer is generally applied before and after fruit harvest. The specific fertilization time can be determined according to the tree vigor. For moderate trees that have already bearing fruit, winter fertilizer can be applied after harvest to prevent problems such as uncontrolled color change or damage to citrus roots caused by improper fertilizer before harvest. Trees with a large amount of fruit and weaker tree should be supplemented with nutrients in time to avoid affecting the next year's output. It is advisable to apply a small amount of compound fertilizer one week before harvest, and then apply winter fertilizer before the dormant period. For the trees that are kept fresh, organic liquid fertilizer should be leached on the fruit trees in mid-December to supplement the nutrients consumed by the fruits hanging on the trees for a long time to facilitate the restoration of the tree vigor.

Fertilization types in winter are generally acidic in southern soils, especially for the conversion of water to fields, and the cultivation layer is relatively shallow. Therefore, it is necessary to ensure that there is enough organic matter to improve the soil. However, organic matter alone is not enough. Biological bacteria that can decompose organic matter are also required to ensure citrus Nutrients are balanced, appropriate amount of compound fertilizer, medium and trace element fertilizers are also essential.

Fertilization methods for 1-2 young citrus trees in winter, circular furrow application on flat ground is recommended. The specific operation is: dig a ring-shaped ditch along the drip line of the fruit tree, the ditch depth is 15-20 cm; the mountain can be used for strip ditch. For fruit trees or mountain orchards, strip furrow is recommended. The specific operation is: dig a strip of ditch along the drip line on both symmetrical sides of the fruit tree, the fertilization ditch is about 1 meter long, 20-30 cm deep, and 20 cm wide, and alternates between plants and rows each time. If some orchards are older and have shallow roots, if it is difficult to open deep furrows to fertilize, the ground drilling method can be used. The specific operation is: use a ground drill to dig deep pits with a diameter of 12 to 15 cm and a depth of 50 cm around the tree, with 4 to 6 pits.

Precautions After fruit picking, combined with clearing the garden, immediately give leaf fertilizer to supplement tree nutrition, restore tree vigor, and then ditch to apply winter fertilizer; pay attention to changing the position of ditching or opening each time, and ensure the depth of ditching. Conducive to the development of citrus root system; the order of fertilization is to apply organic fertilizer, biological bacterial fertilizer first, then compound fertilizer, medium and trace element fertilizers, so as not to damage the citrus root system; after fertilization, two extra-root topdressing can be carried out before freezing, and high-purity phosphorus and potassium sources can be used The foliar shape of the library + sea spirit biological stimulant ensures the nutrition of the tree body and enhances the antifreeze ability; when applying farm manure, it must be decomposed.

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Freeze-dried fruit powder is to freeze the raw material into a solid state first, and then dry it through vacuum, so that the water gradually sublimates out of the ice, and finally get the food raw material in the powder state. Freeze drying technology can completely preserve the taste and nutritional content of food without adding any other additives.

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