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2. Propagation methods Seed propagation, seedling transplanting. Sowing time is divided into autumn and early spring sowing, harvesting from October to November, place it in a dry and ventilated place to prevent decay. In the second and third spring months of April-April, remove the seeds, treat the seeds with warm water, 2 portions of boiling water, 1 portion of cold water, immerse 1 time each morning and evening, and do not take too long. Remove the seed and rinse it once with warm or cold water. After each morning and evening, soak in warm water or cold water once every 4-5 days. Or soak the seeds for a day or two, then use seed dressings and mix the wet sand heap for germination. The seed can be sown when the seeds are exposed. After treatment, the seedlings are excavated neatly, but they may not be processed directly, but the seedlings are not neat, so they are sown in the seedbed, and they are sown at intervals of 20-25cm. The ditch is 3-5cm deep, and a piece of 10-15cm is placed between the plants and the cover soil is 3cm. Gently suppress and keep the soil moist. Seedlings emerged in 10-15 days, and attention was paid to management during the seedling period, and they could be transplanted in the spring of the second year. Sowing volume 375kg/hm2.
Transplanting: After one year of raising seedlings, seedlings can be transplanted when they are 120-200cm tall. When autumn leaves fall to the second spring before the emergence of transplanting, planting by row spacing 200cm planting, hole depth 50cm, hole diameter 50cm, full base fertilizer applied inside the cave, covered with a layer of soil, too long roots, cut the apex, the seedlings Put a hole in the middle, cover half a hole, gently raise the seedlings, let the roots sparse, and then cover the soil compaction, watering, filling points.
For a large area of ​​afforestation land can also be used to seed directly, according to 200cmX 300cm line spacing dig pits, hole diameter 50cm, depth 35cm, the application of base fertilizer, according to the hole seed. The buckwheat can also survive by cutting and afforestation.
3. Field management Seedling during the period of cultivation and weeding, seedling height l0cm, according to spacing 15cm Dingmiao. Every 15-20 days after emergence, topdressing of thin manure was performed once; After transplanting, each topdressing in spring and winter is performed once a year. The manure, livestock and cake are the main fertilizers. The roots are separated from the roots by 30 cm and the gully is applied. Spring topdressing can increase some superphosphate.
4. Disease and Insect Pest Control Tianniu: The larvae feed on the base of the main stem, can empty the trunk and cut off the eucalyptus or die off.
Control methods: capture adult worms, eradicate worm eggs, and use 80% of dichlorvos to impregnate cotton wool, stuff it into boring holes, seal it with mud, and kill larvae. Tigers bite seedlings, in addition to artificial capture, can be used to kill bait.
About the cultivation techniques of eucalyptus
1. The land to be selected for site preparation shall be selected to be sunny, well drained, and fertile loose humus loam. After the land is selected, the basal fertilizer should be applied. The amount of human and animal manure should be 30000kg/hm2. Leveling for 畦, width 100-120cm.