Detailed Guide to the Latest Torreya Planting Techniques and Methods
Torreya (Torreya grandis) is a superior variety among torreya trees and a rare dried-fruit tree species native to China. It not only has high cultivation value but also provides excellent ecological and landscape benefits. Hangzhou has already listed Torreya as a characteristic advantage industry belt for dried fruit development. Torreya base afforestation uses grafted seedlings of 2+3 or above, generally flowering and fruiting by the 3rd year, with each tree producing 1-2 kg of dried seeds by the 6th year, about 10 kg of dried seeds per mature tree, and a per-mu yield that can reach over 10,000 yuan, making the economic benefits very substantial. Developing the Torreya industry is one of the important ways for mountain farmers to escape poverty and achieve moderate prosperity.
Woodland Selection
The ideal afforestation site for Torreya requires a cool, shady low mountain or hilly area with high air humidity, not-too-strong sunlight, and good drainage. Slightly acidic to neutral sandy loam, purple soil, limestone soil and other soils are all suitable for planting Torreya. Soil with a pH value below 5 is not suitable for developing Torreya. The most suitable soil is deep, fertile, well-aerated, and with a low groundwater table. After Torreya begins fruiting, it requires ample sunlight, so afforestation above 400 m elevation should choose sunny slopes or semi-sunny slopes.
Woodland Preparation
Based on the characteristics of Torreya needing shade during its young stage and the need for soil and water conservation, retaining woodland vegetation to create lateral shade is beneficial for both survival and growth after afforestation. Generally, slopes below 15°C can be fully cleared, and intercropping with crops is recommended; slopes of 15-30°C should be prepared in strip patterns, retaining terrace vegetation, and intercropping with crops on the strips is possible; slopes above 30°C should be prepared in fish-scale pit block patterns, digging large holes (80 cm in diameter, over 50 cm deep), and retaining vegetation around the holes.
Understory Intercropping
Torreya grows slowly and needs shade during its young stage, so a three-dimensional management model of understory intercropping with Torreya can be adopted. Suitable deciduous arbor forest stands and other economic forests needing improvement can be chosen for intercropping with Torreya. Note that the canopy density should not be too high, and a light transmittance above 40% is preferable.