Detailed Explanation of Key Points and Management Methods for Pecan Planting Techniques

In recent years, pecans have been selling very well across the country, and their sales volume and sales range have continued to expand. Pecan nuts are nutritious and delicious, can also beautify navigation channels, and can provide excellent timber, making their planting cost-effectiveness very high. The detailed introduction to pecan planting techniques is as follows.

1. Soil: The ideal soil for pecan planting is loose gravelly loam formed from weathered limestone and rich in humus. The best soils are black oil soil and yellow soil developed on limestone, as well as yellow soil developed on sandstone, slate, and shale. Red soil and sandy soil are not suitable for growth.

2. Temperature: Pecans prefer a warm and humid climate, with an optimal average annual temperature of 15.2°C. They can tolerate a maximum temperature of 41.7°C and are relatively cold-resistant, suffering no frost damage even at -15°C. However, low temperatures during the flowering period will affect flowering, pollination, and flower development.

3. Water: Pecan growth requires a fair amount of water, and water requirements differ across various phenological stages throughout the year. Generally, moderate rainfall is needed before flowering during the spring shoot growth period. From late April to mid-May during the flowering period, continuous overcast and rainy weather should be avoided. From June to September, which is the fruit and naked bud development period, abundant and evenly distributed rainfall is required.

4. Light: Pecans are not very demanding regarding light. Young trees require a shaded environment, so seedlings must be artificially shaded. Mature trees grow poorly on sunny, dry, and barren south-facing slopes.

5. Sowing: Plant seedlings from December to January. After planting, firm the tree basin and water thoroughly to settle the roots. Direct seeding to establish fruit orchards is also possible. Sowing time is from October in winter to March of the following year, and can be carried out except during freezing weather. When transplanting, it is best to keep a soil ball for short-distance moves. For long-distance transport, after the seedlings are dug up, the roots should immediately be dipped in mud slurry, which provides protection.

6. Pruning: Early pruning of pecans should be light, appropriately retaining more main branches so they bear fruit early. When pruning, ensure the inner canopy of the tree crown is well-ventilated and receives light. In the early stage, branches and shoots on the upper part of the crown should be retained as much as possible, while the lower part of the crown can be gradually thinned.

7. Cultivation, weeding, and fertilisation: Within 1 to 3 years of establishing a pecan orchard, crops such as soybeans, corn, and Atractylodes macrocephala can be intercropped. During intercropping, the orchard should be cultivated and weeded, and appropriate amounts of organic fertilisers such as burnt mud ash, cake fertiliser, and barnyard manure should be applied. Additionally, 1 to 2 times per year between July and August, weeds, shrubs, thorns, and vines in the woodland should be cut down, and the cut weeds should be used to cover the woodland floor. In winter, the mulch should be ploughed into the soil to increase soil fertility.

8. Pest and disease control: The main pests and diseases of pecans include hickory branch blight, star longhorn beetle, Parasa lepida, and coffee wood borer moth. Focus on pest and disease control in the orchard during winter, and carry out timely control during the growing season based on the occurrence of pests and diseases. At the same time, enhance tree vigour, prevent branch damage, and spray fungicides such as carbendazim or chlorothalonil during the disease onset period.

Pecan trees can also be intercropped with crops such as soybeans, corn, and Atractylodes macrocephala. Pecan nuts currently sell very well, and the tree trunks are also high-quality timber, so the prospects and benefits of planting are very good.