Measures and Methods for Promoting Flowers of Orange with Sand Sugar

Sugar orange is a very common and very popular fruit in China. According to the editor, sugar orange in Guangxi is quite famous, so it can be seen that sugar orange is suitable for living in hot weather. Delicious sugar orange can not be planted in the north.

Flower-promoting measures and methods of planting sand sugar tangerine

The factors affecting the flowering of sugar orange are: variety, rootstock, tree age, moisture, climate and soil conditions, cultivation techniques and so on. There are four commonly used measures to promote flowers in agriculture:

First, drugs to promote flowers:

Paclobutrazol: after the autumn shoot is ripe, spray 500ppm paclobutrazol (that is, 15% paclobutrazol plus 300x water) and spray it again every 20-30 days; this is a safe and effective method.

Second, cutting roots to promote flowers:

For paddy fields and orchards with shallow roots, the roots were cut off after harvest or in December. Hoe around the crown to cut off roots, young trees, strong trees can hoe 4-5 inches deep, middle-aged fruiting trees should be shallow hoe; must hoe part of the surface roots, and sun until the leaves slightly fade green to be effective. Root cutting is also a safer way to promote flowers, and the effect is better if combined with water production.

Third, cut or tie the wire around to promote flowers:

For the vigorous trees with deep main roots, ring cutting should be used to promote flowers. The ring cutting is carried out in the middle and late December, and the young trees can cut the trunk around, while the big trees can cut the main branches better, so that the phloem is cut off without harming the xylem. The canopy turned green about 1 week after ring cutting. For the newly put into production strong and prosperous trees with deep-rooted rootstocks (such as sour tangerines), if the leaves are still thick green but not faded in the middle and last ten days of January, they can be cut again. Ring cutting is a strong method to promote flowers, if the fallen leaves after cutting should be watered in time, early irrigation and fertilization in spring, strong shoots and strong flowers. After ring cutting, stone-sulfur mixture, turpentine mixture and other irritating pesticides can not be sprayed. Spraying 10-20 ppm 2pm2m4murD mixed with 0.3 potassium dihydrogen phosphate or nucleotides can greatly reduce abnormal defoliation.

The iron wire is used to ligate the dry branches with 14-16 iron wire, so that the 2-stroke 3 of the iron wire goes deep into the cortex without harming the xylem. The tree can tie the trunk in 2-5 years, and the thick trunk can tie the branches with a diameter of 3-4 cm. After 1 month, the iron wire can be removed according to the change of leaf color.

Fourth, curved branches and twisted branches: young fruiting trees, especially strong and vigorous trees that have just been put into production, are more likely to have erect strong branches. In order to promote this kind of branches to blossom and bear fruit, in addition to ring cutting, twisting branches can also be carried out. The specific approach is that after the autumn shoots are ripe, use straw grass or plastic bags to bend the overgrown branches, and the bag leaves fade from dark green to light green, which can be unbound. Twisting branches turn the branches around by hand from the base of the branches, injuring the skin and xylem, and the leaves fade from dark green to light green.

Growth habits of Citrus mandarin

The growth and development, flowering and fruiting of citrus trees are closely related to the environmental conditions such as temperature, sunshine, moisture (humidity), soil, wind, altitude, topography and slope direction, which affect the temperature of the most. Even if the air temperature difference of 0.5 ℃ sometimes has different results, high temperature is not conducive to the growth and development of citrus. The fruit and root system stop growing when the air temperature and soil temperature are higher than 37 ℃.

Citrus is a shade-tolerant tree species, but good sunshine is still needed for high quality and high yield. generally, areas with sunshine hours of 1200 to 2200 hours a year can grow normally. Citrus can adapt to a wide range of soil, purple soil, red-yellow soil, beach and coastal land, the pH value of 4.5-8 can grow, and the pH value of 5.5-6.5 is the most suitable.

Planting method of Sugar Orange

Sugar tangerines are generally planted from February to March in spring. Sand sugar oranges are developed on fertile paddy fields and riverside alluvial soil, which can be planted in shallow pits, while paddy fields should be arranged in high beds according to plant rows. For dry land and sloping land with poor soil quality, it is necessary to dig a deep pit of 1 meter square and prepare sufficient base fertilizer. Each pit applies 3 jin of phosphate fertilizer, 5 jin of lime, 100 jin of garbage or pond mud, and 30 jin of pig, cow and chicken manure. When filling the pit, mix the fertilizer with the soil and then fill it back into the pit. The tree plate is about 20 cm higher than the ground. Before planting, cut off some branches and leaves of the seedlings to reduce water evaporation, cut off the main root and retain the fibrous root as much as possible.

When planting, dig a shallow hole to let the fibrous root stretch naturally, and then return to the soil to compact the soil. The height of the buried soil can not be buried beyond the joint of the graft. After planting, cover the tree plate with straw or other weeds and sprinkle it with rooting water. Within a month of planting, it is necessary to keep the soil near the root system moist, high temperature, sunny for a long time, dry soil, drenched with water every day, rainy days, when the soil is moist, there is no need to drench water.

Fertilizer and Water Management of Sugar Orange

1. The principle of fertilization: the needs of various nutrient elements of blood orange should be fully met, and the application of more organic fertilizer, rational application of inorganic fertilizer and formula fertilizer should be advocated. Fertilization was guided according to the results of leaf analysis, orchard soil analysis and blood orange phenology.

2. Fertilization methods: soil fertilization is the main method, combined with foliar fertilization. The methods of ring ditch application, furrow application, hole application and soil surface fertilizer application were adopted.

3. Fertilization for young trees: frequent application of thin fertilizer, mainly nitrogen fertilizer, combined application of phosphorus and potassium fertilizer, fertilization for 5 times in spring, summer and autumn, and 0.4 jin of ammonium bicarbonate or 0.2 jin of urea per plant in March, May, June, July, September and December. For 1 ~ 3 years, the annual application of pure nitrogen per tree is 100g / 400g, and the ratio of nitrogen, phosphorus and potassium is 1.0: (0.4: 0.5): 1.0.

4. Fertilization for adult trees: adult trees apply four times of fertilizer, that is, sprouting fertilizer, fruit protection fertilizer, strong fruit fertilizer and fruit picking fertilizer. The amount of fertilizer generally sprouting fertilizer 2 to 3 jin of chemical fertilizer, a load of dung water. Fruit protection fertilizer 1 jin 2 jin phosphorus and potash fertilizer + 1 jin chemical fertilizer. Strong fruit fertilizer 1 kg 2 jin chemical fertilizer + 1 jin 2 jin phosphorus and potash fertilizer. The fruit-picking fertilizer (base fertilizer) is mainly organic fertilizer, with 50 kg 100 jin organic fertilizer plus 1 kg 2 jin chemical fertilizer.

5. Water management: irrigation when the soil is dry and drainage when stagnant water.

In fact, there are many ways to grow sugar oranges, and perhaps the planting techniques and methods of each fruit grower are different, so fruit growers can communicate with each other and learn from each other, so that they can do a better job in planting and create more profits.