1. Make bed
Ask for seedlings with conventional small seeds. The bed width is 100cm, height is 20cm, slightly repressed after leveling, and 3m of methane pesticide is applied per square meter to control underground pests and cockroaches. The seedling nursery bed is ready before mid-February and every 500g seed is sown in a 20m2 seedbed for future field transplants. The field transplanting bed is ready before the end of March.
2. timely sowing
Sowing time is the key. The temperature has a greater influence on the underground part of the seedlings, and the lower temperature can inhibit the growth of the main root and promote the germination of the lateral roots. Under the conditions of Tongxiang, Zhejiang, the seeding time of metasequoia seeds is appropriate from late February to early March. Appropriate early sowing can not only improve the emergence rate and seedling growth rate, but also prolong the growth period so that the seedling rhizomes are basically lignified before the onset of the summer, thus improving anti-sunburn, drought resistance and disease resistance, which is conducive to the improvement of seedling quality. It can also ease the conflict with labor force in agriculture and be conducive to reasonable arrangements for agricultural work.
Seeds are soaked with 0.5-1% copper sulfate solution for four hours before sowing. After being taken out, they are rinsed with fresh water and dried on the seedbed. The seeding rate is 25g/m2, requiring uniform sowing, so that each seedling has a certain nutritional area.
3. Overwrite? Just 8. Material? /DIV>
After sowing, the metasequoia is screened with moist, clear water (sanded sea sand), and the thickness is about 0.5cm. Then a new layer of mulch is placed on top of the river sand until the seedlings come out of seedlings. The water is then moisturized and kept warm. . In order to be more conducive to the growth of seedlings, a 60 cm-high arched shed should be erected on each seedling bed and a new polyethylene film should be placed on the seedbed. Tonight, the rice straw sheet will be covered on the shed to facilitate heat preservation. The new film has good transparency and has a significant effect on improving the temperature and humidity in the booth. However, when the seedlings are unearthed, the new membrane on the scaffold needs to be replaced with an old one to reduce the transparency and avoid burning the newly emerged seedlings with excessive light. The temperature in the booth should generally be maintained at 30-35°C, and it can be adjusted by removing the film and covering the film. Especially at noon, pay attention to observation when sunlight is strong, so as not to lose seedlings. At the same time, attention should be paid to keeping the seedbed moist, and when the soil is dry, it is necessary to supply water in time to facilitate the unearthing and growth of the seedlings. When the seedlings have 2-3 pairs of true leaves, the film is gradually removed, and the seedlings are prepared and transplanted.
4. Disease prevention and treatment
It is a major hazard of the seedlings of Metasequoia. When the seed shell is topped out, the 800-1000 times 50% carbendazim solution is sprayed on the entire bed to allow the seedlings to pass through a medicated bath to prevent disease and supplement water. When the true leaves grow, they are sprayed once again as in the method, which can prevent and control the damage of the blight at the seedling stage.
5. Fine transfer seedlings
In late March or early April, when the seedlings have 2-3 pairs of true leaves, after a few days of hardening, the young seedlings are picked up slowly with a small shovel, and a small piece of soil is placed at the base as far as possible, so as not to hurt the roots. The wounded leaves were transplanted one by one, with a spacing of 20cm25cm and 12-18 plants per square meter, which was completed in early April. Since the temperature has continued to increase, the amount of evaporation has increased and it has been unfavorable for survival. Therefore, it cannot be transplanted. Generally speaking, each person can weigh about 1500 plants, while planting seedlings, transplanting seedlings, and irrigating the rooting water in time, the survival rate can reach more than 90%. Other management measures are similar to conventional nursery.
Ask for seedlings with conventional small seeds. The bed width is 100cm, height is 20cm, slightly repressed after leveling, and 3m of methane pesticide is applied per square meter to control underground pests and cockroaches. The seedling nursery bed is ready before mid-February and every 500g seed is sown in a 20m2 seedbed for future field transplants. The field transplanting bed is ready before the end of March.
2. timely sowing
Sowing time is the key. The temperature has a greater influence on the underground part of the seedlings, and the lower temperature can inhibit the growth of the main root and promote the germination of the lateral roots. Under the conditions of Tongxiang, Zhejiang, the seeding time of metasequoia seeds is appropriate from late February to early March. Appropriate early sowing can not only improve the emergence rate and seedling growth rate, but also prolong the growth period so that the seedling rhizomes are basically lignified before the onset of the summer, thus improving anti-sunburn, drought resistance and disease resistance, which is conducive to the improvement of seedling quality. It can also ease the conflict with labor force in agriculture and be conducive to reasonable arrangements for agricultural work.
Seeds are soaked with 0.5-1% copper sulfate solution for four hours before sowing. After being taken out, they are rinsed with fresh water and dried on the seedbed. The seeding rate is 25g/m2, requiring uniform sowing, so that each seedling has a certain nutritional area.
3. Overwrite? Just 8. Material? /DIV>
After sowing, the metasequoia is screened with moist, clear water (sanded sea sand), and the thickness is about 0.5cm. Then a new layer of mulch is placed on top of the river sand until the seedlings come out of seedlings. The water is then moisturized and kept warm. . In order to be more conducive to the growth of seedlings, a 60 cm-high arched shed should be erected on each seedling bed and a new polyethylene film should be placed on the seedbed. Tonight, the rice straw sheet will be covered on the shed to facilitate heat preservation. The new film has good transparency and has a significant effect on improving the temperature and humidity in the booth. However, when the seedlings are unearthed, the new membrane on the scaffold needs to be replaced with an old one to reduce the transparency and avoid burning the newly emerged seedlings with excessive light. The temperature in the booth should generally be maintained at 30-35°C, and it can be adjusted by removing the film and covering the film. Especially at noon, pay attention to observation when sunlight is strong, so as not to lose seedlings. At the same time, attention should be paid to keeping the seedbed moist, and when the soil is dry, it is necessary to supply water in time to facilitate the unearthing and growth of the seedlings. When the seedlings have 2-3 pairs of true leaves, the film is gradually removed, and the seedlings are prepared and transplanted.
4. Disease prevention and treatment
It is a major hazard of the seedlings of Metasequoia. When the seed shell is topped out, the 800-1000 times 50% carbendazim solution is sprayed on the entire bed to allow the seedlings to pass through a medicated bath to prevent disease and supplement water. When the true leaves grow, they are sprayed once again as in the method, which can prevent and control the damage of the blight at the seedling stage.
5. Fine transfer seedlings
In late March or early April, when the seedlings have 2-3 pairs of true leaves, after a few days of hardening, the young seedlings are picked up slowly with a small shovel, and a small piece of soil is placed at the base as far as possible, so as not to hurt the roots. The wounded leaves were transplanted one by one, with a spacing of 20cm25cm and 12-18 plants per square meter, which was completed in early April. Since the temperature has continued to increase, the amount of evaporation has increased and it has been unfavorable for survival. Therefore, it cannot be transplanted. Generally speaking, each person can weigh about 1500 plants, while planting seedlings, transplanting seedlings, and irrigating the rooting water in time, the survival rate can reach more than 90%. Other management measures are similar to conventional nursery.
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