Annual management technology of navel orange

1 month focus: plastic surgery, pruning and garden cleaning.

Advocate simple pruning, mainly to transform the tree type, dwarf the crown and enhance the internal light of the crown. Pruned branches of pests and diseases should be removed from the orchard in time and burned. If the fruits have been picked, all employees should spray 3% lime salt solution to kill overwintering pests and diseases and clean the orchard.

Key in February: Apply germination accelerating fertilizer.

Generally, first-bearing trees cannot be planted. As a result, the dosage of human and animal manure, urea and potash fertilizer is controlled at about 20-50 kg +0-0.2 kg per mu.

Focus in March: applying spring bamboo shoots fertilizer

Every time, 50- 100g of urea and 50- 100g of potassium fertilizer are used for each plant, which are dissolved in 5-6kg of decomposed dilute manure or clear water and poured under the drip line of the tree crown.

April Focus: Protecting Flowers and Fruits

Spraying boron-based foliar fertilizer at the early flowering stage (early and middle April) and spraying 0. 2% borax, 0.3% urea and 0. 3% potassium dihydrogen phosphate can significantly improve the fruit setting rate at one time.

May focus: ring cutting to stabilize the fruit.

The most effective way to stabilize the fruit is to cut the main branch into a half-moon shape, peel it with a width of one tenth of the branch diameter and apply a mixture of copper and manganese to protect the wound.

June Focus: Erasing Summer Buds

Summer shoots sprouting from the periphery of the top of adult fruit trees should be completely smoothed (except for young trees that cultivate crowns). After the skylight is opened, a flat oblique branch of 10 cm is left every 30 cm, and it will be repeated many times in the future to cultivate the inner cavity branch group.

Focus in July: Apply strong fruit fertilizer.

As a result, the tree began to apply strong fruit fertilizer, which can also be started in late June, preferably before the arrival of summer drought. The fertilization site is located at the drip line of the tree crown, and the fully decomposed organic fertilizer is the main fertilizer, while paying attention to the ratio of nitrogen, phosphorus and potassium.

Focus in August: fruit cracking control, pest control

The crown can be sprayed with 1% limewater +0.2% potassium sulfate once, and calcium nitrate can also be sprayed once to increase the toughness of the peel and reduce fruit cracking. In addition, it is necessary to focus on the prevention and control of liriomyza sativae and strengthen the prevention and control of aphids and anthracnose on new shoots.

Focus in September: changing * and applying base fertilizer

In the second half of this month, deep application of base fertilizer was started, and organic fertilizer mainly composed of straw, weeds and manure and slow-release phosphate fertilizer were applied as base fertilizer. Sulfur powder can be applied to alkaline soil with pH higher than 7.2 to neutralize the alkalinity of the soil.

65438+ October Focus: Erasing Late Autumn Buds

Cut off the branches of pests and diseases that are too dense and delicate in the crown, so as to facilitate ventilation and light transmission in the crown, accumulate sugar in the fruit, promote flower bud differentiation and reduce the harm of pests and diseases.

1 1 focus: soil moisture control

Autumn rain mostly occurs in autumn. The method to reduce soil water accumulation is not only to drain the water in the deep ditch of the high compartment, but also to cover the ground with plastic film to prevent rain and reduce water, so as to improve the fruit quality in the later period.

65438+February Focus: Timely Harvest

Timely harvesting is an important measure to ensure the quality of navel orange. At present, the natural maturity of most navel oranges with early and middle maturity is 1 1654381from mid-late October to early February. Be very careful when picking fruit. Cut the fruit handle flat with two scissors to avoid stabbing each other. The picking container should not be too big to avoid crushing the fruit.