


【Product Features】
Yishizhuang citrus formula fertilizer is developed by several post scientists from Huazhong Agricultural University based on the soil nutrient status and the fertilizer - demand characteristics of citrus growth. It is a recommended product of the National Citrus Industry Technology System. Demonstrations and promotions in multiple locations across the country have shown that continuous application of Yishizhuang citrus formula fertilizer for many years can significantly increase yield, improve fruit quality, and enhance the commercial rate and high - quality fruit rate. It has the following features:
1.Comprehensive nutrients and outstanding fertilizer effect
Rich in organic matter, with a reasonable combination of major, medium and trace elements. By adopting advanced balanced fertilization technology, slow - release technology and chelation technology, it can meet the nutritional needs of citrus trees, improve the utilization rate of fertilizers, and ensure more complete nutrient release and a more long - lasting fertilizer effect. This product can also treat the physiological yellowing of navel orange leaves, and is conducive to preventing the malignant navel yellowing fruit drop and fruit cracking.

2.Improve the soil and enhance tree vigor
Through the innovative application of soil conditioning and restoration technology, the comprehensive effects of gradually improving the soil and enhancing tree vigor can be achieved in combination with fertilization. Continuous use can effectively inhibit the alternate bearing of navel oranges.
3.Increase yield and improve quality
Reasonable fertilization can promote flowering, fruiting and increase the fruit setting rate, improve fruit coloring and surface gloss, increase the sugar content of fruits, thereby increasing yield, improving quality, and enhancing the commercial rate of fruits.
【Usage Methods】
1.Three fertilizations during the growth cycle
As winter fertilizer (after fruit picking)
Fertilization method: Yishizhuang 35% citrus formula fertilizer (1 jin)+Yishizhuang organic fertilizer (8 - 10 jin) or fulvic acid
potassium powder (1 - 1.5 jin)
As spring shoot fertilizer (when the shoot is about 1cm long)
Fertilization method: 40% or 42% Yishizhuang citrus formula fertilizer (1 - 1.5 jin) broadcast application
Fulvic acid potassium powder (4 liang per tree for flushing application)
Fertilization method: Dilute 200 times for 3 - 5 - year - old young trees; dilute 100 times for adult trees over 5 - 10 years old
As fruit - strengthening fertilizer
Fertilization method: 40% citrus formula fertilizer (1.5 - 2 jin) broadcast application (furrow application is recommended)
2.Furrow application or hole application along the drip line of the tree crown. The fertilization depth is 25 - 40 cm, cover with soil and mix well. It can also be broadcast in combination with soil turning.

Note: Centered on the tree trunk, dig 4 to 6 radial ditches. Dig from the half - diameter of the tree crown outwards. The ditch width is 20 - 30 cm, and the ditch depth is 30 - 40 cm. Gradually deepen and widen from the inside to the outside. The location of the ditch should be changed year by year.

Note: Centered on the outer periphery of the tree crown, dig a ditch 20 - 40 cm wide and 20 - 30 cm deep. Apply the fertilizer into the ditch after moderately mixing it with the soil, and then fill the ditch.
【Precautions】
1.Fertilization after rain has a better effect. If there are consecutive sunny days, fertilization should be carried out simultaneously with irrigation.
2.Determine the fertilization amount according to the tree: For tree bodies and orchards with a high expected fruit yield this year, appropriately increase the fertilization amount; conversely, for tree bodies and orchards with a low expected fruit yield this year, appropriately reduce the fertilization amount.
