A Detailed Guide to Chestnut Planting Techniques and Management Methods
Chestnut is one of the most common nuts, nutritious and delicious, and especially loved by consumers. Chestnut has particularly strong adaptability and vitality, and its yield is especially high, making it one of the easiest fruit trees to cultivate. So come with the editor to learn about the main issues involved in planting chestnuts.
Chestnut Planting Techniques
1. Site selection
Choose gravelly or sandy loam soil with deep soil layers, high humus content, loose texture, good aeration, good drainage, and a pH value of 5.5—6.5 for planting chestnuts. In addition, the planting site should preferably be flat land, a sunny slope, or a semi-sunny slope.
2. Key planting points
On flat land and gently sloping land, carry out full reclamation and land preparation; on steeper slopes, carry out strip land preparation to avoid soil erosion. Plan the planting pits well, select high-quality seedlings, and set the planting depth so that the graft union of the grafted seedling is level with the ground surface. After the young seedlings are planted, water thoroughly to settle the soil around the pit, and after covering with soil, spray with Xin Gao Zhi Mo to preserve moisture. Prevent evaporation and transpiration.
3. Chestnut orchard management
In summer and autumn, hoe and loosen the soil once each season, which both removes surrounding weeds and improves soil structure, benefiting root growth and development. Water and fertilize in a timely manner according to growth needs to ensure nutritional requirements. Strengthen integrated pest and disease control, with prevention as the priority and combining prevention with control. After the orchard is established, apply Cu Hua Wang No. 2 during the flower bud differentiation period each year to promote flower bud differentiation, suppress excessive shoot growth, promote flowering, ensure fruit set, and balance alternate bearing. Before chestnut flowering, during the young fruit stage, and during the fruit expansion stage, spray Zhuang Guo Di Ling to effectively thicken the fruit pedicel and accelerate the fruit filling rate.
4. Orchard cleaning and tree protection
When cleaning the orchard, collect and dispose of fallen dead branches and leaves, diseased and damaged branches, and dropped and mummified fruits in the orchard. During winter pruning, remove vigorous branches, pest- and disease-damaged branches, overlapping branches, and competing branches, and lightly prune the extension leaders of the main branches. Apply “Yu Shang Fang Fu Mo” to the wounds from pruning to seal them, promote wound healing, and reduce pest and disease damage. Use “Hu Shu Jiang Jun” to coat the tree body, which can protect flower buds through winter from freezing damage.
Environmental Requirements for Planting Chestnuts
1. Water: Chestnuts can be planted in places with annual rainfall of 500-2000mm, but places with 500-1000mm are most suitable. Different phenological stages have different water requirements and responses, especially during the chestnut filling stage in autumn; if water is sufficient, it is beneficial to the full growth of the nuts and the improvement of yield.
2. Temperature: Chestnut is suitable for growth within an average annual temperature range of 10-17℃. The average daily temperature during the growing season (April-October) is 10-20℃; when winter temperatures fall below -25℃, and the suitable temperature during the flowering period is 17-27℃, below 15℃ or above 27℃ will affect pollination, fertilization, and fruit set. During the fruit enlargement period between August and September, an average temperature above 20℃ can promote nut growth.
3. Soil: Chestnut is suitable for growing in sandy loam soil with relatively high organic matter content and good aeration, which is beneficial to root growth and the production of large numbers of mycorrhizae. It grows poorly in heavy, poorly aerated soil with poor drainage during the rainy season (prone to waterlogging). Chestnut is sensitive to soil acidity and alkalinity; the suitable pH range is 4-7, and the most suitable is slightly acidic soil with a pH of 5-6. Weathered soil in limestone mountainous areas is mostly alkaline and not suitable for developing chestnuts. Soil weathered from granite and gneiss is slightly acidic and has good aeration, making it suitable for chestnut growth. The main reason chestnut adapts to acidic soil is that it can meet the chestnut tree's requirements for manganese and calcium, especially manganese; when the pH value is high, manganese becomes insoluble and cannot be absorbed and utilized by the root system. Chestnut is a high-manganese plant, with manganese content in the leaves reaching more than 0.2%, clearly exceeding that of other fruit trees. However, in alkaline soil, the manganese content in the leaves will be lower than 0.12%, the leaves lose green color, and metabolic function is extremely low. Therefore, chestnuts must be developed in areas with slightly acidic soil.
4. Light: Chestnut is a tree species with a relatively strong preference for light and requires sufficient sunlight during the growth period. In valley areas where the average daily sunlight time is less than 6h, the tree body grows upright, the leaves are thin and the branches are slender, the yield is low, and the quality is poor. Therefore, in the selection of orchard sites, determination of planting density, shaping and pruning methods, and other cultivation management aspects, consideration should be given based on the characteristic that chestnut has a strong preference for light.
How to Prevent Pests and Diseases
In autumn and winter, use a mixture of lime sulfur stock solution plus salt plus quicklime plus metalaxyl mancozeb plus water (1:1:6:0.5:20) to brush the tree trunk, which can prevent and control chestnut blight; for tree bodies that are already diseased, first scrape off the diseased tissue; for powdery mildew control, spray 0.3 degrees Baume lime sulfur mixture or 50% thiophanate-methyl 100-fold solution at the early stage of the disease; for control of the chestnut weevil, spray 90% trichlorfon 1000-fold or dichlorvos 800-fold in early June, and after harvesting the fruit, soak the nuts in 50℃ hot water for 10 minutes to kill the larvae in the fruit; the key to controlling chestnut aphids is to scrape off the bark where eggs overwinter in winter, whitewash the trunk with lime sulfur mixture, and spray Decis 1500-fold or buprofezin 1000-fold in mid-May; for control of the chestnut fruit moth, spray Shachongwei 800-fold or isocarbophos 600-fold when the pest occurs in July-August.
Chestnut Harvesting Methods
Chestnuts generally mature in September-October, and the harvesting methods generally include the following three for reference:
1. Chestnut harvesting: the burr-beating method
The method of directly knocking the chestnut burrs down from the tree with a bamboo pole is called the burr-beating method. The burr-beating method requires strict control of the harvesting period and timely harvesting. The best harvesting period is when the chestnut burrs have split to 50%, at which time they can be harvested all at once. This method has a concentrated harvesting period and is fast, making management and sales convenient.
2. Chestnut harvesting: the chestnut-picking method
To ensure the quality of the chestnuts, the chestnut-picking method should be advocated. When the nuts are fully mature, the chestnut burrs split, and the nuts or burrs fall off; pick up the fallen fruits every morning and evening. Nuts that fall to the ground are plump and of excellent quality, suitable for storage and transportation.
3. Chestnut harvesting method three: In production, the chestnut-picking method is often used together with the burr-beating method, that is, when some chestnuts fall off 2 days to 3 days before harvesting, use the chestnut-picking method, and when 50% of the chestnut burrs have split, harvest all at once or harvest in batches.
Note: Harvest at the appropriate time. If harvested too early, the chestnut fruits will not have accumulated sufficient substances, will have high water content, poor fruit flavor, and will not keep well, so harvesting should be carried out when more than half of the chestnut burrs have split. To reduce losses, promptly pick up fallen fruits every day during the harvesting period to avoid air-drying.
Chestnut has especially wide utilization value, and its eating methods are also diverse. Not only can you eat raw chestnuts, but you can also stew them, stir-fry them, and many people also like to use chestnuts to make wine, and so on. From this perspective, planting chestnuts is one of the good projects for entrepreneurship, with high yield and very promising development prospects.