How to manage Sugar Orange in Winter

The weeds in the garden were cleared and covered on the tree plate, or trenched under the crown dripping line, the soil was filled with fertilizer or weeds and then sprinkled with lime powder, and the soil quality was improved by weed retting. To do a good job of disease prevention and cold resistance for fruit trees in winter, ring cutting, root cutting, fertilization, hormone and nutrition can also be adopted to promote flowers, but attention should be paid to water control, and at the same time, the cleaning of plantations should be strengthened to provide a good growth environment for fruit trees to help them survive the winter smoothly.

The temperature is low in winter, in order to help the sugar orange tree survive the winter smoothly, you can clear the weeds in the garden and cover the tree plate, or you can open a ditch under the dripping line of the tree crown, bury the soil fertilizer or weeds and sprinkle it with lime powder. improve the soil by retting rotten weeds.

After weeds are eradicated, some of the diseases and insect pests left in the topsoil can be eliminated by using the sunshine and low temperatures in winter.

If it often frosts in winter, you need to prepare clean water, wash off the remaining frost on the leaves in time, and spray brassinolide early on the crown to improve the cold resistance of young trees and ensure that they survive the winter smoothly.

Management method of Sugar Orange in Winter

1. Disease prevention and cold resistance

After ditching and applying winter fertilizer to the young trees in January, cultivate soil on the tree plate around the dripping line of the crown, mix 35-40 jin of quicklime, 0.5 jin of salt, 2 jin of stone sulfur mixture and 100 jin of water, then brush the trunk white, and then sprinkle some lime powder to improve the quality of the soil, maintain the temperature in the soil and prevent diseases and pests. If there is frost, the frost on the leaves should be clear in time, and all brassinolide should be sprayed in advance. Enhance the cold resistance of sugar orange trees.

2. ring cutting to promote flowers and root cutting to control water.

If there is sufficient indecent assault, rich water price and good tree growth in the orchard to be checked the next year, ring cutting can be used to promote flowers, but attention should be paid to the strength and position in the operation, and must not be too deep and too wide. do a good job in disinfecting the ring cut after ring cutting.

At the same time, we also need to do a good job of cutting roots and promoting flowers. Seven days before winter fertilizer is applied, we should hoe 10-20cm ditches around the 20cm under the crown drip line to cut off the roots of the tree, and do a good job of water control management to promote flower bud differentiation.

3. Fertilizing to promote flower

The main application of organic fertilizer, but also can add some potassium sulfate compound fertilizer, trace element fertilizer and calcium magnesium phosphate fertilizer, if the tree growth is weak and the leaves are yellow, we can apply more potassium fertilizer to improve.

4. Hormone promoting flower

When the autumn begins to mature, paclobutrazol should be sprayed to prevent the destruction of reproductive growth and affect flower differentiation after the emergence of winter, and flower-promoting hormones such as brassin, elicitor, cytokinin and 2mai 4Mel D can be used alternately to promote flowers. generally, the elicitor is sprayed once in December and January, and cytokinin is sprayed twice in late December or early January and the first fruit preservation, and once a month after December.

5. Nutrition to promote flowers

Astaxanthin can be sprayed twice after the autumn is slightly ripe in November, December or January, and twice high-phosphorus, high-potassium, high-calcium, high-boron amino acid foliar fertilizer can be sprayed from late October to before flower formation.

Potassium and calcium have antagonistic effect on trees, too much use will be easy to burn seedlings, amino acid calcium or humic acid calcium had better not be used at the same time, so as to avoid overnutrition and affect the growth and development of trees.

If you want to supplement calcium to the tree, it is best to choose buried base fertilizer, if the page needs to be sprayed, you can choose mannitol calcium, or other neutral mixed calcium is the best.

6. Strengthen the garden cleaning.

Cleaning the plantation can improve the activity of the tree, add a protective film for the tree surface, strengthen the cold resistance, frost resistance, frost resistance and bacteria resistance of the tree, and promote the fruit trees to survive the winter safely.

After picking fruit, before sprouting in late winter and early spring, the orchard should be cleared twice, usually every 20 days or so, the dead branches and rotten leaves in the garden should be removed or buried deeply, and pesticides should be sprayed on the whole tree, ground and weeds of the whole orchard.

For the first time, stone sulfur mixture can be sprayed to kill mites with nisorenthiazone to kill eggs, or acetylene mites can be sprayed to kill mites with isocarbophos or fenpropathrin or mono-formamidine to kill mites and eggs. You can also add some foliar fertilizer to promote flowers.

The second spray of green glume mineral oil insecticidal and acaricidal bacteria, with brassin and amino acids sprayed at the same time, if it is a warm winter, then the insect may have awakened, can be added Awei, imidacloprid and other spraying insecticidal.