Tianshan Spruce Seedling Technology
2023-05-11 21:07:36
First, nursery farming
For the spruce nursery plots, loam and sandy loam soils with good drainage and irrigation conditions should be selected. The spruce seeds are small, and only by intensive cultivation can the sprouting rate of the seedlings be raised, and high-quality strong seedlings can be cultivated. Deeply plowing land in autumn with a depth of 250.30 cm; applying 3 tons of base fertilizer per 667 square meters. Soil preparation was combined with soil preparation. A solution of 0.1 kg of carbendazim or thiophanate-methyl was sprayed with 1 kg of solution per 667 square meters. The bed was made fine in spring and the soil was finely chopped. The bottom water was poured 3 days before sowing.
Second, the selection of seeds
Seeds were subjected to winnowing and water selection prior to sowing. The purity of the twice-selected seeds should be above 80%. About 5 days before sowing, soaking with 0.5% ferrous sulfate solution for 3 to 4 hours, when the shell is iron black, remove it and pour it into warm water of 25~30°C for 24 hours, and then remove and place it in the wooden box. , Daily spraying with warm water of 30°C 5 times, heat preservation and moisturizing. After 4 days, when more than 80% of the seeds are cracked, they can be mixed with fine sand.
Third, sowing time
My field nursery earlier in the autumn frost is suitable for sowing in the spring. In spring, the ground temperature is increasing and planting is generally in mid-May. The seeding rate is 40 kg per 667 square meters, with wide-format drilling, and the width and amplitude are 1020 cm. Place the bed flat, place the seeder on the bed, spread the seeds evenly, and cover the layer of sterilized mixed sawdust (1 part for saw, 3 parts for soil) with a thickness of 0.5-1 cm. Gently suppress after covering the soil, and then cover the bamboo curtain.
Fourth, seedling management
Shade
Tianshan Spruce is a shade-tolerant tree species, especially in the seedling stage, which requires certain shaded conditions. Therefore, the shading method is adopted. After the seedlings of spruce are all out, they can be from 6 pm every day to 9 am on the second day. Roll bamboo curtains up. On August 30, all bamboo curtains were removed to promote seedling growth and lignification.
2. Weeding
In order to reduce the large amount of evaporation of soil moisture, loosen the topsoil, and increase the permeability of the soil, weeds should be kept free of weeds.
3. Pest control
When a large number of seedlings are unearthed, they can be sprayed with 1% carbendazim and thiophanate methyl, with a dose of 60 kilograms per 667 square meters. Spray it once every 7-8 days, spraying 4 times.
4. Irrigation
According to the weather and soil conditions, timely and adequate watering with a watering can to keep it moist.
5. Wintering
Young spruce seedlings are young, low in lignification, weak in cold resistance, and prone to frost damage. In particular, early winter freezing injury and physiological drought often result in a large number of deaths of seedlings. Therefore, it is necessary to take effective measures before the winter snow cover to make antifreeze wintering. jobs. Before the soil is frozen, the sawdust and sheep droppings are sieved and disinfected, and a 1:3 mixture (1 part of saw dust and 3 parts of sheep manure) is evenly covered on the seedlings to cover the seedlings.
For the spruce nursery plots, loam and sandy loam soils with good drainage and irrigation conditions should be selected. The spruce seeds are small, and only by intensive cultivation can the sprouting rate of the seedlings be raised, and high-quality strong seedlings can be cultivated. Deeply plowing land in autumn with a depth of 250.30 cm; applying 3 tons of base fertilizer per 667 square meters. Soil preparation was combined with soil preparation. A solution of 0.1 kg of carbendazim or thiophanate-methyl was sprayed with 1 kg of solution per 667 square meters. The bed was made fine in spring and the soil was finely chopped. The bottom water was poured 3 days before sowing.
Second, the selection of seeds
Seeds were subjected to winnowing and water selection prior to sowing. The purity of the twice-selected seeds should be above 80%. About 5 days before sowing, soaking with 0.5% ferrous sulfate solution for 3 to 4 hours, when the shell is iron black, remove it and pour it into warm water of 25~30°C for 24 hours, and then remove and place it in the wooden box. , Daily spraying with warm water of 30°C 5 times, heat preservation and moisturizing. After 4 days, when more than 80% of the seeds are cracked, they can be mixed with fine sand.
Third, sowing time
My field nursery earlier in the autumn frost is suitable for sowing in the spring. In spring, the ground temperature is increasing and planting is generally in mid-May. The seeding rate is 40 kg per 667 square meters, with wide-format drilling, and the width and amplitude are 1020 cm. Place the bed flat, place the seeder on the bed, spread the seeds evenly, and cover the layer of sterilized mixed sawdust (1 part for saw, 3 parts for soil) with a thickness of 0.5-1 cm. Gently suppress after covering the soil, and then cover the bamboo curtain.
Fourth, seedling management
Shade
Tianshan Spruce is a shade-tolerant tree species, especially in the seedling stage, which requires certain shaded conditions. Therefore, the shading method is adopted. After the seedlings of spruce are all out, they can be from 6 pm every day to 9 am on the second day. Roll bamboo curtains up. On August 30, all bamboo curtains were removed to promote seedling growth and lignification.
2. Weeding
In order to reduce the large amount of evaporation of soil moisture, loosen the topsoil, and increase the permeability of the soil, weeds should be kept free of weeds.
3. Pest control
When a large number of seedlings are unearthed, they can be sprayed with 1% carbendazim and thiophanate methyl, with a dose of 60 kilograms per 667 square meters. Spray it once every 7-8 days, spraying 4 times.
4. Irrigation
According to the weather and soil conditions, timely and adequate watering with a watering can to keep it moist.
5. Wintering
Young spruce seedlings are young, low in lignification, weak in cold resistance, and prone to frost damage. In particular, early winter freezing injury and physiological drought often result in a large number of deaths of seedlings. Therefore, it is necessary to take effective measures before the winter snow cover to make antifreeze wintering. jobs. Before the soil is frozen, the sawdust and sheep droppings are sieved and disinfected, and a 1:3 mixture (1 part of saw dust and 3 parts of sheep manure) is evenly covered on the seedlings to cover the seedlings.
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