Container bag Seedling and forestation of Taxus mairei

Taxus, a national first-class key protected tree, evergreen tree, 30 meters high, bark grayish brown, reddish brown, or dark brown, split into strips, 1-year-old branches green or yellowish green, leaves striped, slightly curved or straight, apex gradually acute, dense uniform and minute round angular nipple on lower midvein, seeds oval, apex with raised short obtuse tip, heartwood orange-red, sapwood yellowish brown, straight texture Very solid and durable, for high-grade furniture, piano shell, cabinetwork, etc., regarded as treasures by the folk. Taxus is mostly wild, because the root system is underdeveloped, therefore, the survival rate of cultivating bare-root seedlings for afforestation is low, and it is not easy to form a forest, while cultivating container seedlings has a high survival rate, easy to become forest, and grows faster than bare-root seedlings.

I. Biological characteristics

Produced in the south of Qinling, in Yunnan, Guizhou, Sichuan, are distributed, often born in the mountains above 1000 meters ~ 1200 meters above sea level, like shade, like warm and humid climate, like slightly acidic or neutral soil.

II. Seed collection and storage

The time of seed collection should be in October. After Cold Dew, the seeds should be collected. When collecting the seeds, the seeds on the mother trees which are more than 20 years old, growing strong and free of diseases and insect pests should be collected. After the seeds are collected, they should be stored with fine sand, and attention should be paid to keeping indoor ventilation and turning over the seeds to avoid mildew.

III. Preparation and sowing of nutritious soil

1. Preparation of nutritious soil

Generally take the core soil to crush, and then mix well with the humus in the forest according to the proportion of 2:8, and then apply nitrogen, phosphorus, potassium ternary compound fertilizer, the amount of compound fertilizer is generally 20 kg per cubic meter of soil, the fertilizer and soil are mixed well, and nutritious soil is prepared by fermentation. After the nutritious soil is prepared, disinfect it with dimethazone, and then mix it well with the nutritious soil.

2. Fill container bag

Generally choose the cylindrical plastic container bag, put the prepared nutrient soil into the container bag, the nutrient soil should fill the container bag, and then place the container bag on the flat seedbed one by one. The width of the seedbed is generally 1.2 meters.

3. Sowing seeds

The sowing time was in late February. Soak the seeds in warm water of 60 ℃ for 2 hours before sowing, and then sow the seeds after 3-4 days of accelerated germination treatment. When sowing, insert a hole in the middle of the container bag with a thin stick, with a depth of about 3 cm, and then put the seeds into the hole and cover the holes with nutrient soil.

IV. Management at seedling stage

About 50 days after sowing, the seedlings begin to be unearthed, and the seedling stage is usually from April to May. In case of continuous high temperature, shading and watering should be carried out, and weeds should be removed in time. The container bags where the seedlings have not been unearthed should reseed seeds or replant seedlings. The seedling stage is generally from July to September, and fertilizers are generally used with ternary compound fertilizers of nitrogen, phosphorus and potassium, and the times of fertilization are generally 3 times. the first time is in late June, the amount of fertilizer is about 2 kg per mu, and the second time is in late July. the amount of fertilizer is about 4 kg per mu, the third is in late August, and the amount of fertilizer is about 8 kg. In case of high temperature and drought, watering should be carried out, usually once every 3-5 days.

5. Afforestation

1. Selection of forest land

The afforestation site is selected at an altitude of 1000 m ~ 1200 m, shady slope or semi-shady slope, purple soil or yellow loam soil, the soil layer thickness is more than 40 cm.

2. Afforestation mode and afforestation density

The mixed afforestation method should be adopted for the afforestation of Taxus mairei. Taxus should be crossed with evergreen broad-leaved trees such as silk chestnut, and the mixed ratio is Taxus chinensis: broad-leaved trees = 6:4, and the planting density is 220trees per mu.

3. Consolidation and planting of forest land

Remove weeds from afforestation land, soil preparation time 10 ~ 12 months, site preparation specification yew 30 cm × 30 cm × 20 cm, broad-leaved trees 40 cm × 40 cm × 30 cm, planting time January, seedlings should be shipped to the forestland with bamboo baskets to avoid damaging seedlings or nutrient soil, put nutrition bag seedlings into planting holes when planting, cut or tear nutrition bags with scissors, and then cover the soil.

4. Young forest tending

(1) weeding, loosening soil and expanding holes

The tending period was 3 years, and the time was carried out in late May, the weeds were completely eradicated, and the soil was loosened and the holes were expanded around the seedling planting holes.

(2) fertilization

The fertilization period is 3 years, once a year, and the ternary compound fertilizer of nitrogen, phosphorus and potassium is generally used, with 0.05 kg per plant in the first year, 0.1 kg per plant in the second year and 0.15 kg per plant in the third year.