Seedling raising method of Taxus mairei under forest

The scientific and technological personnel of the Forestry Institute of Xinning County, Hunan Province have begun the experimental study on the seedling cultivation of Taxus mairei since 1978, and found out a set of seedling raising method under the pine forest according to local conditions in the scientific experiment, which can effectively save labor and reduce the production cost.

It is estimated that raising seedlings under the pine forest per mu can save 40 labourers such as transporting mycorrhizal soil, pulling grass, setting up a shade shed, drought resistance, and saving 1200 yuan in expenses such as shade shed materials, and the production cost can be reduced by 1500 to 2000 yuan per mu, and the seedling under the forest has the advantage of fast seedling growth, and the height growth is generally 120 to 140 percent of that in the field.

In addition, the method of raising seedlings under the forest can effectively solve the problem of insufficient seedling land in mountainous areas. Therefore, the method of raising seedlings under the forest is worth popularizing in the research and development of Taxus mairei. The specific methods are as follows:

The main results are as follows: (1) seed collection and germination: the seeds of Taxus chinensis var. mairei can be harvested when the fruit is dark red in mid-and late October. Because the seeds are physiologically post-ripening, they need to be stored in wet sand for one year before they can germinate. The outdoor natural wet sand accumulation method is often used to treat seeds in order to improve the germination rate.

(2) nursery site selection and soil preparation: select the middle adult forest of Pinus elliottii or Pinus massoniana with canopy density of 0.6 to 0.7, the slope is relatively gentle, the soil layer is deep and well drained, and the weeds and shrubs in the forest are removed from August to September in autumn. and arranged into a horizontal ladder, dig 20 cm to 30 cm deep, in November, shallow turning fine rake. When preparing the soil, 40 to 60 piculs of rotten base fertilizer are applied per mu, and then the bed is made in separate compartments, and the bed is high. 15 cm to 20 cm, 1.2 m wide. After leveling the surface of the box, press out the sowing ditch with a board 15 cm wide, with a depth of 2 cm and a distance of 20 cm.

(3) sowing at the right time: after a year of storage, 30% of the seeds are white, the seeds should be screened out in time, and disinfected in 0.2% potassium permanganate solution for 10 minutes, then rinse with clean water, dry and sow evenly in the ditch, after sowing, dig up the yellow loam with mycorrhizae and sifted under the pine forest to cover the seeds, and the thickness is to see no seeds.

(4) after sowing, moss seedlings are planted to protect the seedling bed from Rain Water and direct sunlight, to protect the seedlings from sunburn, to avoid suffocation due to buried stems and leaves, and to keep the soil loose and moist. Reduce the use of ploughing and weeding.

(5) strengthen the technical measures such as prevention and control of seedling diseases and insect pests, mid-tillage weeding, fertilization and so on. Through fine management, annual seedlings can reach 12 cm to 18 cm, biennial seedlings can reach 40 cm to 50 cm.