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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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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 Key Technical Points for Soil Management in Apple Orchards
I. Ridge raising and mulching. 1. Dig fertilization pits (this can be done together with the application of base fertilizer). On the inner side, 30-40 cm vertically below the extended branches on the outer periphery of the tree canopy, dig 2-4 fertilization pits each 40 cm long and 40 cm wide and 50 cm deep (the depth for topdressing is 20 cm). 2. Dig trenches and raise ridges. Outside the fertilization holes, along the row direction
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Key Management Points for Potted Mango Seedlings in Winter
Choose a flat, open area with convenient drainage and irrigation, and avoid setting up seedbeds in windy gaps or areas where cold air easily accumulates. The size of the seedbed can be determined according to the terrain, generally 100 cm wide, with the length depending on the terrain. Dig the seedbed into a trough-shaped rectangle 5-8 cm below ground level.
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Detailed Explanation of the Key Points of Artificial Cultivation Techniques for Cordyceps sinensis
Is there artificial cultivation of Cordyceps sinensis now? Is artificial cultivation of Cordyceps sinensis very difficult? Wild Cordyceps sinensis is truly very rare, and people are now researching how to carry out artificial cultivation of Cordyceps sinensis. In recent years, research on artificial cultivation of Cordyceps sinensis at home and abroad
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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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Five key points for winter management of citrus, fruit growers must remember
After the citrus fruit is harvested, because the tree body has consumed a large amount of nutrients in bearing fruit, nutrients need to be supplemented to restore tree vigor. At the same time, winter is also a critical period for citrus flower bud differentiation and for pests and diseases to overwinter. Therefore, strengthening winter management is the basis for a bumper harvest next year and for reducing pest and disease damage.
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Key Points of Post-Grafting Management Techniques for Top-Grafting and Variety Conversion of Citrus
1. Do well in cutting the rootstock stubs. After using side grafting with exposed buds, the rootstock stubs should be cut or sawed off. This should be done in two steps. First, leave about 15cm of rootstock stub above the graft union. After the new shoots have become lignified, cut the stub flush with the graft union and smooth the cut surface with a knife. 2. Do well in removing sprouts. After top-grafting, because the apical dominance has been removed,
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Citrus November Management Experience and Key Points
I. Strengthen management for improving late-stage citrus fruit quality ① Focus on reducing soil water-holding capacity before harvest. Moderate drying of the soil before harvest helps reduce the effectiveness of nitrogen fertilizer, can concentrate the juice, increase sugar content and maintain relatively high acidity, giving the fruit a richer flavor. In autumn
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Detailed Explanation of Key Points for Autumn Management Techniques of Citrus
1. Heavy application of fruit-swelling fertilizer: its fertilizer amount accounts for about 30% of the annual fertilizer amount, mainly decomposed organic fertilizer. Dig an arc-shaped ditch 20-30 cm deep and 20 cm wide between rows at 50-100 cm from the main trunk. For large trees, apply 2.5 kg of cake fertilizer and 50 kg of decomposed pig or cattle pen manure or human excrement and urine per tree; for small
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