Citrus fruit expansion management "four strengthening"

From October to October, it is the peak period of citrus fruit inflating, and it is also a large growth period of autumn shoots. The contradiction between shoot and fruit nutrition is more prominent. To achieve large, good color, early ripeness, sweetness and storability of citrus fruit, four enhancements should be made in management: 1. Strengthen fertilization. In order to achieve the balance between vegetative and reproductive growth of citrus, it is necessary to look at trees for fertilization and coordinate nutrition. The trees with large trees, many fruits, and weak nutrient growth weigh heavily on strong fruit fertilizers, and have reasonable combinations of nitrogen, phosphorus, and potassium fertilizers, which fully meet the needs of fruit growth and development of new shoots for nutrients. The young trees with few results and strong nutrient growth should be fertilized with less fertilizer. In particular, it is necessary to control the amount of nitrogen fertilizer, prevent leggy and increase quality. Adhere to the combination of surface fertilization and foliar fertilizer application. In the late stage of fruit enlargement, foliar spray of 0.2%--0.3% of potassium dihydrogen phosphate or compound fertilizer or 20% of turfgrass leachate and 1% of superphosphate calcium leaching solution, 0.03%--0.05 % Rare Earth nitrate not only promotes fruit enlargement, but also promotes coloration, early sweetening, improved quality, and improved storage stability. 2. Strengthen drought resistance. July-September is the peak period of citrus fruit enlargement and autumn shoot growth. The orange area in the middle and lower reaches of the Yangtze River is susceptible to the regular autumn drought, resulting in small fruit, sunburn, fruit cracking and fruit drop, and lowering yield and quality. Therefore, strengthening drought prevention is the key. Conditional orange groves must be timely irrigated; in the mountainous orange groves, grass should be covered with moisturizing and drought protection; cultivating loose soil in the cultivating field to prevent soil compaction and reducing water evaporation: applying water repellents and soil repellents. Foliar spraying of aspirin (0.03%--0.05%) and other inhibitors to reduce evaporation loss of water in the soil and tree; spraying water on dry leaves to increase air humidity to achieve water, fertilizer, gas and heat Coordination to prevent drought and high temperatures. However, irrigation should be stopped 20 days before fruit harvesting to reduce cell water content, increase solid content, promote early maturation, and increase storage stability. 3. Strengthen and improve quality. The following hormones and substances are sprayed at the late and mature fruit stages to improve the fruit quality: 10.2%--0.3% Baume degree lime sulfur; 210mg/kg concentration 2,4-D plus 2% lime water mixture 30.5--0.7g/kg paclobutrazol or 18/kg chlormequat: 40.03%--0.05% rare earth liquid; 5300--500 times rice vinegar; 6 coloring sweetener. These substances can inhibit the growth of autumn shoots, reduce the consumption of nourishment, increase nutrient accumulation, promote fruit enlargement, and increase sugar content; promote thin and smooth fruit skin, improve coloration and early maturing; prevent pre-harvest fruit drop, increase fruit firmness, and reduce storage and rotting fruit. 4. Strengthen pest control. The major pests of citrus fruit during the expansion period are anthracnose, resinous and rust mite, red spider, scale beetle, and fruit sucking moth. The prevention and control should be strengthened in a timely manner to prevent pre-harvest fruit drop and disease in the field, and to increase the commodity rate and storage stability of fruits. China Agricultural Network Editor

Sushi Ginger

NINGXIA KOFOLON INTERNATIONAL CO.,LTD. , http://www.kofolon.com