How to prevent root rot by applying urea to navel orange seedlings after planting?

Prevention and control methods: 1. Advocate the application of farmhouse fertilizer; In particular, high-quality commercial bio-organic fertilizers are applied. If nitrogen, phosphorus and potassium are insufficient, Tianji brand nitro compound fertilizer can be used as supplement; Vigorously advocate the use of fruit trees to crush leaves, weeds, and straw and bury them in the ground to improve soil aeration.

However, it should be noted that all compound fertilizers, compound fertilizers, organic and inorganic mixed fertilizers and other chlorine-containing fertilizers produced with ammonium chloride and potassium chloride must be banned on fruit trees.

2. Improve fertilization methods and strengthen soil management. The application of fermented and rotten farmhouse fertilizer should be pounded and sprinkled evenly, and the use of a planer and shovel to dig into the soil to prevent digging ditches and fertilizing too much and burning the root system.

3. Dredging the drainage system to prevent water accumulation in the orchard. In the orchard, the orchard is planed and the main trunk is raised by 15-20 cm to form a ridge back shape to prevent water accumulation under the trees after heavy rains. The rows of fruit trees are formed in a groove shape 15-20 cm below the canopy, which can be watered smoothly on dry days and drained smoothly after heavy rains.

This can effectively prevent root rot.

4. Strengthen soil improvement and scientifically replant young trees. If the lower part of the fruit tree is clayey soil, a large hole must be dug, and the middle and lower parts should be filled with topsoil, sandy soil, weeds, straw and other organic matter to create a loose living soil layer.

Don't water too much, you can use some rooting powder water for watering, and don't water too much for the rest.

Navel orangeWinter fertilizer should be applied with chemical fertilizer. Navel orange winter fertilization to protect the leaves, fertilization to phosphorus, potassium fertilizer-based, fruit picking half a month before the fruit fertilizer, fruit after half a month after the fruit fertilizer application, winter to bridge buried in the garden of the base fertilizer, each plant pig pen fertilizer 20 kg, cake fertilizer 800 grams, perphosphate liquid high acid calcium.

500 grams to improve the cold resistance and leaf preservation ability of the tree.

Apply good overwintering fertilizer to navel oranges

Although navel oranges only bloom in March, the nutrients required for flowering should be prepared from the previous year's fruit picking, and the key word for winter fertilizer application of navel oranges is "early", and the earlier the fruit is applied, the better the effect. Navel orange winter fertilizer is mainly organic fertilizer, with an appropriate amount of compound fertilizer.

Organic fertilizer must be decomposed before it is used. Some farmers use unrotted vegetable bran, which is not completely rotted until half a year later, which not only does not increase yield, but affects the root growth of navel oranges.

In order to meet the growth needs of navel oranges, it is also necessary to apply certain chemical fertilizers. at the drip line.

Make a ditch 30 to 40 cm nearby and mix the fertilizer with the dead grass on the ground. In some orchards with severely acidified soils, the soil pH value should also be increased when winter fertilizer is applied. It is best to apply granular boron fertilizer according to the standard of 2kg per mu when applying winter fertilizer, and apply it together with organic fertilizer, which can improve the sweetness of navel oranges.

and reduce the thickness of the peel of navel oranges.

It is better to fertilize the original method.

1) Increase the amount of nitrogen fertilizer, because the young tree stage is mainly for vegetative growth, and the canopy needs to be expanded rapidly, so a large amount of nitrogen fertilizer needs to be applied. According to local experience, generally 1 3-year-old young trees can be fertilized throughout the year, and high-nitrogen water-soluble fertilizers can be used.

2) The amount of fertilizer applied to young trees increases with the age of the tree, the canopy continues to expand, and the demand for nutrients increases, therefore, the fertilization of young trees should adhere to the principle of increasing from less to more and increasing year by year. The amount of fertilizer applied is 150% in the first year in the second year and 150% in the second year in the third year.

3) The fertilization period focuses on fertilization in the period when new shoots are extracted, especially in May and June to promote the growth of summer shoots, which should be regarded as the key fertilization period. 7 August promotes the growth of autumn shoots, which is also an important fertilization period.

4) The number of fertilization is weak, the distribution range is small and shallow, and there is no fruit burden, therefore, the general amount of fertilizer can not be too much, and the method of diligent and thin application should be adopted, that is, the number of fertilization should be more, and the amount of each application should be less. Fertilize 4 to 6 times a year, or more times.

5) Intercropping green manure, fertilizing the soil juvenile navel orange orchard, more open space between the rows, in order to improve the soil, increase soil organic matter, improve soil fertility, and prevent weeds, should be applied in winter and summer, deep into the soil, constantly improve the soil, and mature the soil.

Summary. There is no harm, foliar fertilizer can promote the ripening of the fruit, making the fruit healthier. However, care should be taken not to stain the fertilizer with the fruit when fertilizing to avoid the occurrence of residual toxins.

Hello, no. Navel orange fruit contains organic acids, which can be directly sprayed with foliar fertilizer if it is not treated by Sleepy Linggao Tewang, which can easily cause leaf wilting, serious diseases and premature senescence of plants. It is recommended that you choose a commercially available water-soluble and efficient plant foliar fertilizer to get an excellent spraying effect.

Does spraying foliar fertilizer prevent damage to the fruit?

There is no harm, foliar fertilizer can promote the ripening of the fruit, making the fruit healthier. However, Bilian should be careful not to stain the fertilizer with the fruit when fertilizing, so as not to cause residual toxins.

Hello, will drop leaves.

Nitrogen is one of the basic substances that make up trees and fruits, and it is also the most demanded nutrient in the growth process of navel oranges. Therefore, experienced growers and agricultural material sales will tell us how important nitrogen fertilizer is, and unreasonable novices will mistakenly understand nitrogen fertilizer as an "all-rounder" product! Moreover, the lack of control over the amount of fertilizer has led to serious excess of nitrogen, long branches and leaves of fruit trees, thickening and thickening of fruit skin, difficulty in coloring, and sour taste.

Although nitrogen is good, fertilization should also be "on time and in the right amount". Navel oranges have different nitrogen requirements at different stages of growth.

During the growth period of young trees, elements can help fruit trees sprout and grow quickly; In adult trees, especially in the early fruiting stage, excess nitrogen will severely affect flower differentiation and the number of fruit hanging from fruit trees.