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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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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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How to prevent and control citrus fruit cracking? Master these cultivation techniques
Every year in June and July, after the second physiological fruit drop, citrus generally does not drop fruit, but then fruit cracking of varying degrees occurs. The peak period of fruit cracking generally occurs in early August and in the two periods from late August to early September. Citrus fruit cracking is one of the important physiological diseases of citrus during the fruit-swelling period.
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Detailed Explanation of Key Techniques for Summer Management of Citrus
Summer is a critical period for citrus management. Citrus is in the fruit expansion stage and has a relatively high fertilizer demand, and it is also the plum rain season with high temperature and high humidity, which is the peak period for citrus pests and diseases. To ensure high quality, increased yield and increased income of citrus, strengthening the management of citrus orchards in summer is very important.
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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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How to Harvest Citrus Scientifically? Detailed Explanation of Key Technical Points
The step of fruit harvesting is often easily overlooked, with people thinking that as long as the fruit is picked it is fine, so harvesting is often done roughly, causing improper harvesting of fruit and resulting in economic losses. For this reason, when picking fruit, attention must be paid to implementing harvesting techniques and harvesting scientifically, so
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Key Technical Points for Citrus Cultivation to Increase Sugar and Reduce Acid
Implementing the citrus "increase sugar and reduce acid" technology is an important measure for creating high-grade branded citrus. Through the promotion and application of "increase sugar and reduce acid" technology, citrus quality can be effectively improved, achieving industrial efficiency and increasing farmers' income. I. Main Technical Measures 1. Promote optimal transformation of citrus orchards. Comprehensively
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Detailed Explanation of Key Techniques for Summer Management of Citrus Orchards
From the perspective of the phenological stages of citrus growth and development, summer occurs during the young fruit stage (second physiological fruit drop period) through the summer shoot emergence period. Citrus fruits enter the expansion stage, requiring larger amounts of fertilizer and water. This coincides with the hot and humid season, which is also the peak period for citrus pests and diseases.
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Key Points of Summer Citrus Pest and Disease Control Techniques
Summer's high temperature and high humidity make it the season with the highest incidence of citrus pests and diseases in the entire year. If pest and disease control is inadequate during this period, it will seriously affect the cultivation of young citrus branches and shoots, affect the development of young fruit on bearing trees, and even trigger massive fruit drop. Therefore, it is essential to effectively strengthen summer
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