The growth management of citrus spring is very important. This spring, there is more rain and it has suffered from “cold spring”. Therefore, it is the key to cultivate citrus spring cultivation.

Citrus Spring Training Opinion:

First, clear the ditch drain. In spring, there is a lot of rain. The soil moisture content of the orangery garden is too large, which will lead to poor soil ventilation and affect the growth and development of citrus. Therefore, it is necessary to do a good job of clearing the ditch in the citrus garden; the orange garden on the slope should open the trench and the ditch; For the Pinghu District Orange Garden, which is easy to pick up water, it is necessary to strengthen the work of clearing the ditch, open the ditch, the ditch, and the ditch, and pay attention to keep the “three ditch” unobstructed.

Second, cultivating and weeding. The citrus rhizosphere environment needs good permeability. Generally, the citrus orchard is deeply ploughed for 2 to 3 years. The soil of the orange grove should be cultivated once after sunny days. The depth of cultivating is about 25cm, but the area around and around the tree stalk should be shallowly ploughed, and the main root and the thick root can not be damaged. Other areas should be ploughed. Combined with cultivating, the branches, weeds, and pests in the garden are completely removed and taken out of the garden to burn.

Third, the application of fertilizer. For citrus gardens with large amount of fruit hanging last year or weak growth and no application of “harvesting fruit fertilizer”, fertilizer should be applied as early as possible before mid-March. Fertilization should be based on ground fertilization, supplemented by foliar topdressing. The amount of ground fertilization is 1 to 1.5 kg per plant, and the growth potential is normal and the application is weak. It is advisable to use bio-organic fertilizer or citrus-specific formula fertilizer for application of fertilizer, but it is not possible to apply chlorine-containing compound fertilizer. The fertilization method changed the past hole application to the application: from 1 to 2 days before the medium rain, evenly within 80cm between the trees and between the rows, it should not be applied before the heavy rain to prevent the loss of nutrient scouring. Foliar spray should use 0.3% urea plus 0.2% potassium dihydrogen phosphate, and other foliar fertilizers with proven fertilizer effect can be selected. The acid soil combined with the cultivating loose soil is 150kg per acre of lime. The application of lime can supplement calcium nutrition, neutralize soil acidity, inhibit the occurrence of pests and diseases, and is conducive to high quality and high yield of citrus.

Fourth, plastic trimming. Good ventilation and light transmission conditions are required in the citrus garden and in the crown. In the citrus orchard where the clearing of the clearing garden or the clearing of the clearing house was not in place last winter, a pre-emergence pruning should be carried out in March. The principle of pre-emergence pruning is “simplified pruning”, that is, it should be thick and not suitable. The main method is to use the big branch pruning technique, that is, to cut a central erect big branch from the base of the canopy with large shade. In addition, the cross branches go to leave one, sawing (cutting) the branches and dead (dead) branches and piles that are harmful to pests and diseases. The branches densely growing in the canopy are appropriately removed, and the branches elongated to the outside of the canopy are short-cut. The trimmed branches are taken out of the garden and burned out. For large cut (saw) wounds, the surface should be flattened and coated with a protective agent or film.

Fifth, pest control. For those who did not clear the garden last winter, in the end of March, a Baume 1 degree stone sulfur mixture or a 45% crystal stone sulfur mixture 80 times solution should be sprayed. In addition, pay attention to the prevention and control of pests such as flower buds, red spiders, leaf miner, anthracnose, and scab.

Sixth, the transformation of poor quality and low-yield gardens. The age of the tree is more than 30 years, the tree is weak or near death, the yield is less than 500kg, and the quality is inferior to the orangery; the planting varieties are mixed, and the average annual yield per mu is less than 1500kg. In March and April, as appropriate, the use of deep-renovation, re-application of organic fertilizer, large crown to small crown, shifting and thinning, high-replacement, and re-planting of the park will be carried out to transform the inferior and low-yield gardens.