Reasonable fertilization can reduce the number of fertilization and fertilizer waste, improve the utilization of fertilizers, and meet the needs of citrus tree growth and flowering results in time. It is an important prerequisite for high quality, high yield and high efficiency in citrus groves. Chinese citrus production areas generally fertilize fruit trees in the following periods:
Reapply winter fertilizer. Shi Dong Fei can promptly restore tree vigor and improve the winter cold resistance of the tree, so as to lay a good material foundation for the flowering results of the following year. This fertilization should not be delayed as soon as possible. It should be applied before the end of November. Apply 2,000 to 3,000 kilograms of farmyard rotund fertilizer per acre, add 45% compound fertilizer (15-15-15) to 30 to 50 kilograms, preferably in combination with winter ploughs, and apply under a canopy under a canopy.
Apply early before flowering. Appropriate application of pre-harvest fertilizer can promote the spring shoots to grow vigorously and neatly, and promote the formation of more effective flowering branches, provide sufficient nutrition for flower bud differentiation and flower development, thereby improving flower quality and providing nutrient reserves for flowering and fruit setting. It is generally applied from late February to early March. It is advisable to use high-nitrogen nitrogen and phosphorus compound fertilizers. In conjunction with the application of decomposed organic fertilizers, high-nitrogen and phosphorus compound fertilizers of 20 to 30 kg per acre are generally applied. However, we must pay attention to the high temperature in the spring, easily lead to long spring flourishing areas, to properly reduce the amount of nitrogen fertilizer application.
Skillfully applying strong fruit fertilizer. At this time, most varieties have already entered the period of fruit enlargement, and at this time, positive early autumn shoots are extracted, and the contradiction between shoots and fruit is more prominent. Reasonable application of strong fruit fertilizer can promote fruit development and improve the quality of autumn shoots. The fertilization is applied from mid-July to early August and should be dominated by high-quality, quick-acting fertilizers. In conjunction with the application of organic fertilizer, generally 30 to 40 kg of fruit-specific fertilizer is applied per acre.
Root fertilization. In the flower bud stage, flowering stage, young fruit stage, with the water-soluble available fertilizer for rootless fertilization, can increase the fruit setting rate and conducive to fruit enlargement and development.
There are two methods of soil fertilization and extra-root fertilizer application in the citrus orchard. The main methods are soil fertilization and supplementation with extra-root fertilizer. There are generally the following methods of soil fertilization: 1. Ring groove application: Especially suitable for sapling basal fertilization, excavate a 20 to 30 cm wide circular groove at 40 cm to 50 cm depth and 50 to 60 cm depth. With the expansion of the crown, the annular groove expands outwards year by year. 2. Strip-shaped channel application: fertilize in the rows or between trees or in rows, and the width of the groove is 40-50 cm and the depth is 50-60 cm. This method is suitable for close planting gardens. 3. Acupuncture: According to the amount of fertilizer, digging holes in the periphery of the crown 1 to 4, deep 50 to 60 cm, length 80 to 100 cm, width 40 to 60 cm.
Reapply winter fertilizer. Shi Dong Fei can promptly restore tree vigor and improve the winter cold resistance of the tree, so as to lay a good material foundation for the flowering results of the following year. This fertilization should not be delayed as soon as possible. It should be applied before the end of November. Apply 2,000 to 3,000 kilograms of farmyard rotund fertilizer per acre, add 45% compound fertilizer (15-15-15) to 30 to 50 kilograms, preferably in combination with winter ploughs, and apply under a canopy under a canopy.
Apply early before flowering. Appropriate application of pre-harvest fertilizer can promote the spring shoots to grow vigorously and neatly, and promote the formation of more effective flowering branches, provide sufficient nutrition for flower bud differentiation and flower development, thereby improving flower quality and providing nutrient reserves for flowering and fruit setting. It is generally applied from late February to early March. It is advisable to use high-nitrogen nitrogen and phosphorus compound fertilizers. In conjunction with the application of decomposed organic fertilizers, high-nitrogen and phosphorus compound fertilizers of 20 to 30 kg per acre are generally applied. However, we must pay attention to the high temperature in the spring, easily lead to long spring flourishing areas, to properly reduce the amount of nitrogen fertilizer application.
Skillfully applying strong fruit fertilizer. At this time, most varieties have already entered the period of fruit enlargement, and at this time, positive early autumn shoots are extracted, and the contradiction between shoots and fruit is more prominent. Reasonable application of strong fruit fertilizer can promote fruit development and improve the quality of autumn shoots. The fertilization is applied from mid-July to early August and should be dominated by high-quality, quick-acting fertilizers. In conjunction with the application of organic fertilizer, generally 30 to 40 kg of fruit-specific fertilizer is applied per acre.
Root fertilization. In the flower bud stage, flowering stage, young fruit stage, with the water-soluble available fertilizer for rootless fertilization, can increase the fruit setting rate and conducive to fruit enlargement and development.
There are two methods of soil fertilization and extra-root fertilizer application in the citrus orchard. The main methods are soil fertilization and supplementation with extra-root fertilizer. There are generally the following methods of soil fertilization: 1. Ring groove application: Especially suitable for sapling basal fertilization, excavate a 20 to 30 cm wide circular groove at 40 cm to 50 cm depth and 50 to 60 cm depth. With the expansion of the crown, the annular groove expands outwards year by year. 2. Strip-shaped channel application: fertilize in the rows or between trees or in rows, and the width of the groove is 40-50 cm and the depth is 50-60 cm. This method is suitable for close planting gardens. 3. Acupuncture: According to the amount of fertilizer, digging holes in the periphery of the crown 1 to 4, deep 50 to 60 cm, length 80 to 100 cm, width 40 to 60 cm.
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