Winter citrus leaves have a particular attention

When the citrus enters the dormant period, 40%~60% of the nutrients in the tree are stored in the leaves. Therefore, the winter leaf protection is not only beneficial to enhance the cold resistance of the tree, promote flower bud differentiation, but also facilitate the spring growth and flowering results in the following year.

After the citrus is harvested, the nutrient is deficient. If it is not fertilized in time, some orange orchards may have curling and wilting. Therefore, after citrus picking fruit and spraying fertilizer, the color of the leaves can be kept green and the tree can recover quickly. The method is to spray 0.5% urea + 0.2% to 0.3% potassium dihydrogen phosphate every 10 to 15 days, and spray 3 to 4 times. The amount of spray fertilizer is suitable for the tree, and the amount of fertilizer is not dripped after spraying.

　　 The soil is turned deep, a heavy fertilizer is applied, and soil is applied after the application to increase the soil temperature; the tree is covered with grass, and the thickness is 8-10 cm. At the beginning of the frost, the general manager of the tree was sprayed with a good antifreeze effect.

　　 Plastic trimming, improving light conditions and promoting leaf photosynthesis. The trimmed mouth is applied to the callus anti-corrosion film to promote wound healing. In case of drought after winter, it is necessary to look at drought and water conservation in time, and adopt measures such as furrow irrigation or hole irrigation. The tree plate is loosened to protect the soil and reduce the evaporation of soil moisture. In case of rain and rain, soil water, and roots lacking oxygen, drainage should be carried out in time to prevent a large number of abnormal leaves. Foliar application of new high-lipid film prevents leaf virus infection, which makes the leaves green and lush, photosynthesis product accumulation and directional transport ability enhanced, and prevent leaf senescence.