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How to correctly apply biogas fertilizer in jujube tree cultivation
The Yulin area in northern Shaanxi is a nationally famous red jujube production area, with a citywide jujube tree area of 75,000 hectares and an annual output of 56,500 tons of fresh jujubes. The jujube areas are mainly distributed in Jiaxian County, Suide County and Qingjian County along the Yellow River. These areas belong to the Loess Plateau region, with poor soil and poor farming conditions.
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Key Technical Points for Planting and Management of Winter Jujube Trees During the Dormant Period
In November, winter jujube trees enter the dormant period, which is a favorable time for planting winter jujube. The main work this month includes applying base fertilizer, protecting the tree body, and building new orchards. 1. Applying base fertilizer: Applying base fertilizer at this time, when ground temperature is high and soil moisture is abundant, allows fertilizer to decompose quickly and facilitates root absorption.
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Experience Sharing on Dwarfing and Close Planting Cultivation of Jujube Trees
Dwarfing and close planting cultivation of jujube trees means transforming the large, widely spaced arbor into a short, compact plant resembling a small shrub; it is a new type of cultivation model. This model helps save land resources, facilitates intensive cultivation, and supports modern management. Jujube tree ju
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Technical Key Points for Applying Biogas Fertilizer to Apple Trees
In addition to being rich in the major elements nitrogen, phosphorus and potassium, biogas fertilizer also contains trace elements such as boron, copper, iron, manganese, calcium and zinc that play an important role in fruit tree growth, as well as large amounts of organic matter, various amino acids and vitamins. In addition, applying biogas fertilizer can significantly
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Detailed Explanation of Fertilization Techniques for Fruiting Mango Trees
Fertilization of fruiting mango trees should follow the principle of reasonably adjusting the contradiction between vegetative growth and reproductive growth. It is necessary both to promote flowering and fruiting in the current year and to control excessive summer shoot growth, and also to promote the sprouting and robust growth of autumn shoots, so as to lay a good foundation for continued bumper harvests in the following year. Fertilization
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Key Technical Points for Flower and Fruit Retention in Citrus Cultivation
The 2-3 months from bud emergence to fruit set stabilization is the most important period of the year for citrus trees. For a good harvest, comprehensive flower and fruit retention measures must be taken according to the growth conditions of the citrus trees and changes in weather. 1. Reasonable fertilization: For citrus orchards that were not fertilized last winter, organic fertilizer should be supplemented as soon as possible. For adult trees, apply 5-10 kg of chicken manure or 1-2 loads of farmyard manure per tree, plus an appropriate amount of urea, and bury it around the root zone. The fertilization principle during the flower and fruit retention period is: nitrogen-based in the early stage, emphasis on potassium with phosphorus supplementation in the later stage; combining soil fertilization with foliar feeding. For the post-bloom fertilizer, apply compound fertilizer plus an appropriate amount of urea during the flower-falling period to promptly replenish nutrients consumed during flowering; for the fruit-setting fertilizer, apply potassium fertilizer plus an appropriate amount of phosphorus fertilizer; for the fruit-swelling fertilizer, apply compound fertilizer plus potassium fertilizer. For foliar feeding, spray 0.2% monopotassium phosphate twice from spring bud break to before flowering, spray nucleotides during rainy days, and add 0.1% borax to one of the applications; during the young fruit stage, spray foliar fertilizer 2-3 times in combination with pest and disease control or fruit retention, with the first foliar spray including 0.1% magnesium sulfate and 0.1% zinc sulfate.</p><p>2. Soil management: Repair drainage ditches inside and outside the orchard to remove standing water, so that waterlogging on rainy days does not affect root growth or even cause root rot leading to flower and fruit drop. During continuous dry and hot weather lasting more than 10 days, irrigate promptly to keep the soil moist and loose, which helps the root system absorb water and nutrients.</p><p>3. Scientific use of growth regulators: Plant growth regulators commonly used for citrus fruit retention include 2,4-D, fruit-retention hormone, triacontanol, 920, and fruit-retention agents. Use them 2-3 times after flower drop, spraying once every about 15 days. Alternating different growth regulators gives better results. For seedless and few-seeded citrus varieties, using 920 or triacontanol for fruit retention gives better results.</p><p>4. Pest and disease control: During the flowering and fruiting period, the main pests and diseases include red spider mites, rust mites, aphids, citrus blossom midges, tortrix moths, anthracnose, and scab. For aphid control during the spring shoot stage, use omethoate or monocrotophos; in early to mid-April (or early March if drought occurs), control red spider mites, and in mid-to-late April control rust mites, using acaricides or biological pesticides for spraying; spray organophosphorus pesticides at the early bud stage to kill citrus blossom midges and tortrix moths; for diseases, focus on prevention, using fungicides such as copper oxychloride or thiophanate-methyl.</p><p>5. Control early summer shoots: From May to mid-June, promptly remove early summer shoots to avoid competition between shoots and fruit for nutrients, which benefits young fruit development and reduces fruit drop. For vigorous trees with few flowers and few fruits, girdle the trunk 25 days after flower drop to retain fruit, which can also control summer shoots.</p>
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What are the care methods for citrus trees after freezing damage
After a citrus tree is damaged by freezing, the aboveground part suffers varying degrees of injury or dieback, while the underground part is generally less damaged. Post-freeze care measures mainly make use of its relatively intact root system to promote the sprouting of new branches, restore the canopy as quickly as possible, and gradually achieve the goal of normal growth and fruiting.
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Key Technical Points for Managing Young Citrus Trees for High Yield and Tree Shape
The management goal for young citrus trees is to promote multiple flushes of new shoots and the emergence of vigorous branches, accelerate the number of branching orders, form a full canopy as quickly as possible, and establish a strong framework, laying a good foundation for high and stable yields. To achieve this, the management technical measures should include: 1. Timely
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How to control the mango tree borer (Chlorophorus annularis)
Distribution and damage: it occurs both at home and abroad, and in China it occurs to varying degrees in Yunnan, Guangdong, Guangxi, Fujian and other places. The larvae bore into and feed on the branches of fruit trees such as mango and cashew, usually entering from young branches and gradually boring downward to large branches and the trunk, seriously affecting
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What are the control methods for apple tree root rot?
Apple trees often suffer from root rot. Because the root system is buried in the soil, when the disease is initially contracted or mild, it is either not discovered or, once discovered, not accurately diagnosed, so the right treatment is not applied. In mild cases this leads to weak tree vigor and reduced yield and quality; in severe cases it causes the death of the plant, or even the loss of the entire orchard.
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