l. Apply germination fertilizer in time. In view of the current problems of increasing citrus age, declining tree vigor, and insufficient tree nutrient levels, this year should focus on the application of spring priming fertilizer. Fertilization time: from late February to early March. The amount of fertilizer applied depends on tree vigor. The focus is on the big tree that will bloom more this year and the tree that has not been basal. General strains producing 50-80 kilograms of trees can be applied to 0.5-1 kilograms of organic biological fertilizer or 0.3-0.4 kilograms of urea plus 0.5-1 kilograms of superphosphate or 25-50 kilograms of pig urine. Should open the outer edge of the tree crown ring groove, long groove or radial groove depth of 5-8 cm. 2. Pruning starts at the right time. Doing a good job in pruning is an important technical link to win the harvest of citrus. Pruning should be cut every year, big cuts, small cuts. Pruning time: It is advisable to advance with spring shoots from late February to March. The focus of pruning should be on citrus groves that will be year-round and years old without shearing. The main pruning method: (l) sparse cut: First of all, to eliminate excessive dense technology. The multi-backbone tree will eventually retain one trunk. The main branch will eventually retain 2-3, and the sub-master will eventually retain 4-6. The main branch is evenly distributed. The excess branches are usually more than the bases are removed, the sawing is slightly tilted, and the pile cannot be retained. In order to prevent the withdrawal of ineffective shoots (such as spurts); followed by the outburst of the tree branches that have been the result of many years, exceeding the control height and resulting in the closure of the high branch order from the base, so that the canopy coverage reaches 80-85%, The university system is within 2.5 meters; the last is the 2-4 year old branch order of the tree crown that is densely denuded, so that the canopy is densely thinned, densely covered, and densely distributed on the outside. (2) Shrinking shear: It is mainly a group of recessive branches that have been shrinking and shearing for many years, making them rejuvenate, increasing their tree vigor, and achieving the purpose of rotating the results. The method is to shrink the results of the recession team for many years to robust branches or buds. The use of horse-bred sticks, robust shoots or buds to produce new fruiting branches; followed by shrinking the overlapping branches of the crown, so that they do not overlap, improve the utilization of light; and then shrinking and cutting cross-cutting techniques, making each order Residing on one side does not interfere with each other and increases the volume of results. (3) Short cuts: When the short cuts are taken, short cuts of 10-2 cm are made on the outer branches of the tree crowns, and the shoots are pulled and the resulting shoots are cultured. The reduction of the crown after pruning in the spring should be a reduction of the overall size, and the shoots are neither overlying nor overlying. 3, loose soil warming. In late February to March, in conjunction with other management of the citrus groves, a shallow squat should be carried out in the entire park to loosen the soil and solve the problem of stagnation and grassland shortage, which is generally shallow 3-scm. 4, spray foliar fertilizer. In view of the current weak tree vigor and the impact of leaf blades on frost damage, the citrus tree should be sprayed on the leaves several times, beginning in March. Can spray 0.3-0.5% urea, 0.2-0.4% of potassium dihydrogen phosphate, can also be added 0. l-0.2% borax, photosynthetic fertilizer and other foliage fertilizer products. 5, do a good job of pest control. (1) Citrus red-yellow spider. In March, the orange garden should be sprayed and controlled once, and depending on the pest situation, it can be sprayed with 5% Nisolol 2000-3000 times liquid plus 20% fluorenone 2000 times liquid. (2) Citrus scab. After the germination of citrus fruit and the young fruit, pay attention to medication control. Available 70% thiophanate WP 800-1000 times; 40% EVID 500-800 times, kill 1000 times. (3) Bright orange buds. In the end of March to early April, spray the methyl 1605 mixed powder on the citrus garden ground. When the buds are fresh, use 1000-2000 times liquid such as trichlorfon, or dichlorvos or extermination to spray the canopy, to prevent the flower buds from being sprayed. . 6, pay attention to do a good job drain ditch. Too much rainfall in spring will affect the increase of water holding capacity in citrus field. Attention should be paid to the drainage of clean trenches, especially citrus gardens that are easily reclaimed and easily waterlogged. 7, a reasonable intercropping. When intercropping with citrus gardens in spring, dwarf and leguminous crops should be used as the main crops. High-crop crops should not be intercropped and fruit trees or tree trays should be reserved.
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