Fertilizer and Water Management of Navel Orange and Measures of Land Selection and Garden Establishment

Navel orange, formerly known as sweet orange. Aliases: Huangguoshu, orange, navel orange, orange, orange. Latin name: Citrus sinensis (L.) Osbeck. Rutaceae, small evergreen trees of the family Rutaceae, branchlets glabrous, branches short or absent. Leaves elliptic or ovate, entire or with obtuse teeth; petiole narrowly winged, tip articulated. Navel orange is an improved variety of citrus cultivated all over the world. At present, many high-quality navel oranges are cultivated in various parts of our country. Navel orange is rich in nutrients and contains all kinds of nutrients necessary for the human body. Navel oranges contain large amounts of vitamin C and carotene, which help to inhibit the formation of carcinogens, soften and protect blood vessels, promote blood circulation, help reduce cholesterol and blood lipids, reduce the risk of heart disease, and prevent gallbladder disease. Navel orange is rich in vitamins, which can prevent the occurrence of scurvy. The fruit is orange and yellow with green markings. Suitable for potted plants, it is good for viewing leaves and fruits.

In order to select improved varieties and strong seedlings to grow navel orange, Newhall and other varieties with good comprehensive characters should be selected, and the seedlings should be free of diseases and insect pests, with a trunk diameter of more than 0.8 cm and 2 branches.

In selecting a site to build a garden, reasonable close planting can generally choose a mountain garden with adequate water resources, convenient transportation, back north to south, deep soil layer, fertile and loose. Slope garden should open a good terrace, the general bandwidth of more than 2.5 meters, planting holes are 1 meter long, wide, high, can also dig trenches 80 cm deep, 1 meter wide planting. The planting specification of navel orange is 1 m × 1.5 × 2 m, and the planting time is before spring shoot sprouting or after autumn shoot maturing.

Fertilizer and water management

Apply sufficient basic fertilizer: each plant is 25 kilograms of weeds, 1.5 kilograms of calcium superphosphate, 1.5 kilograms of lime, 1.5 kilograms of chicken manure or bran cake, buried in 3 layers from coarse to fine, one layer of soil and one layer of fertilizer, sprinkled with lime, and filled to the top of the hole. Retting chicken manure or bran cake (retted with a little calcium superphosphate for 3 months) and applied to the top layer of the planting hole. Then the piers are planted 30 centimeters above the ground and 70 centimeters wide to prevent sinking and stagnant water.

Fertilization for young trees: 1. 2-year-old navel orange was fertilized 6-8 times a year, with emphasis on promoting shoot fertilizer and strong shoot fertilizer in spring, summer and autumn. Shoot-promoting fertilizer was applied 10 days before shoot release, mainly nitrogen fertilizer, urea 25g per 1-year-old tree, 0.1 kg urea per 2-year-old tree, plus fecal water or rotten soybean bran water. The application of strong shoot fertilizer in the extension period of new shoots was mainly phosphorus and potassium fertilizer, with 75 grams of compound fertilizer per 1-year-old tree and 0.1 kg per 2-year-old tree.

Fertilization for adult trees: the navel orange began to hang fruit in the third year after planting, and it was divided into budding fertilizer, strong fruit fertilizer, autumn shoot fertilizer and fruit picking fertilizer in the whole year. Budding fertilizer was applied in late January, urea 0.1 kg per plant, compound fertilizer 0.2-0.3 kg, borax 50 g and magnesium sulfate 50 g, strong fruit fertilizer was applied in late May after the second physiological fruit drop of navel orange, 0.4-0.75 kg compound fertilizer was applied per plant plus 75 g potassium sulfate, and autumn shoot fertilizer was applied in late July with 0.25 kg urea and 1 kg compound fertilizer per plant. Fruit-picking fertilizer was applied 3 days before fruit harvest, with 0.25 kg of urea and compound fertilizer per plant.