Six skills on how to quickly color and sweeten citrus;
1. Apply more organic fertilizer (decomposed farmyard manure), intercropping green manure, and apply more Bika 2 billion compound bacterial fertilizer. Advocating the use of bran cake, peanut bran and bio-organic fertilizer, and topdressing fertilizers containing humic acid and amino acids can improve the color and sugar content of fruits.
2. Strengthen crown management. Brighten and sweeten, change the density of orange orchard to sparse, change the height of crown to short, and ensure the formation of "independent trees" Tree pruning follows the principle of ventilation and light transmission. Control water 20~30 days before harvesting, and orchards with conditions can cover the ground with reflective film, which not only controls water, but also supplements light, which is beneficial to improve the sugar content of fruits.
3. Supplement Bika 10-7-48 high-potassium water-soluble fertilizer to sweeten. Bika boron fertilizer was added in bud stage, and Bika foliar fertilizer effectively supplemented and promoted zinc, boron and magnesium fertilizers from fruit expansion stage to color-changing maturity stage. Adding phosphorus and potassium fertilizer, phosphorus can improve the fertilizer absorption ability, drought resistance and cold resistance of fruit roots, promote flower bud differentiation, improve fruit quality and increase fruit yield; Potassium can promote the growth of thick branches and developed tissues, improve the ability of cold resistance, drought resistance and pest resistance, and improve fruit yield and storage performance.
4. Adjust soil pH, supplement Bika calcium fertilizer to improve quality, brightness and sweetness, and prevent low cracking quickly and effectively. Yellow red soil is mostly acidic, with a pH of 4~5.5. The application of lime to neutralize soil acidity can improve the utilization rate of soil nutrients, and the mixed application of organic fertilizer, green manure and calcium magnesium phosphate fertilizer can increase the sugar content of fruits.
5. Supplementary application of Bica monopotassium phosphate and Bica foliar fertilizer containing amino acids for 2-3 times (not sodium cyclamate, generally products with liquid amino acids+high potassium+medium and trace elements as the main components). Spraying before swelling and coloring can appropriately increase the sugar content. If the coloring period of citrus is earlier, the fruit can mature early and evenly.
6. Production control: Don't overdo the new shoots, but harvest them completely. The variety of fruit is large, and the fruit thinning is strict. For example, the standard fruit diameter of Wogan is 7~8 cm, which is sweet and expensive. If the result exceeds the standard, the diameter is less than 60, the taste is poor and the price is less than 50%.
Pay attention to nitrogen control: too much nitrogen and water will make the fruit thick and tasteless and delay coloring. Results Appropriate or small amount of nitrogen fertilizer should be applied during the growth period of trees.
Pay attention to water control: when the color is mature, you must control the water, and you cannot water it at will. Summer shoots and autumn shoots, just the right amount, too much fruit nutrition supply is insufficient, too small fruit, sugar crispness will also be affected.