Is eucalyptus poisonous? How much is the seedling price? How much is planted per mu? How do you plant it?

Eucalyptus, also known as Eucalyptus, White Diesel (Chaoshan), Mangshu (Nanao), Gali (Eucalyptus), Eucalyptus and so on, is the general name of Eucalyptus plants of Myrtle family. Is it poisonous? How much is the seedling price? How much is planted per mu? How do you plant it? It is learned from Suqian seedling base that the general price of eucalyptus seedlings is about 2-3 yuan.

Is eucalyptus poisonous?

It is said to be poisonous, but in fact there is no poison. This point has also been specially introduced in Central Radio 10. Eucalyptus has a wide growing area and strong vitality, so it can be planted in southeastern Guizhou. And eucalyptus is one of the three famous fast-growing tree species in the world, which has the advantages of strong adaptability, short cultivation period, high wood yield, wide use and so on. It can be used as greening on both sides of the road with fast growth, fast effect and neat forest appearance, and is an excellent street tree. It has good wood industry characteristics and can be widely used in wood-based panels, Blockboard, paper pulping, edible fungi, furniture and so on.

How many eucalyptus trees are planted per mu?

The planting density of eucalyptus has a very important effect on the final yield of eucalyptus, while digging holes determines the final planting density. When digging holes, the distance between digging holes should be determined according to the planting years and variety growth characteristics of fast-growing eucalyptus, so as to ensure that eucalyptus has reasonable permeability in its growth, and avoid wasting soil fertility because the planting density is too low. In general, the digging density can be 3m × 2m, the digging specification is 1250px × 1250px × 1000px, and the shape is arranged in zigzag shape. In addition, it is also necessary to prevent soil erosion caused by digging, so that the soil is prepared first and then dug, and the depth of the bottom of the pit should be deeper than that of 1000px. Generally speaking, about 111 trees can be planted on one mu of land.

How to grow eucalyptus?

The planting density (row spacing) of common eucalyptus species was 1.5m × 3m, 148 trees per mu, 2m × 3m, 117m or 3m × 3m per mu, 89 trees per mu.

The best planting month of eucalyptus is from February to June every year, during which the survival rate of eucalyptus is high and the trees grow vigorously.

Fertilization technology of eucalyptus

The main nutrient elements absorbed by eucalyptus are nitrogen, phosphorus, potassium, calcium, magnesium, zinc, boron and so on. According to the study, each eucalyptus tree absorbs an average of 36g of nitrogen, 2.8g of phosphorus, 20g of potassium, 31g of calcium and 8.5g of magnesium per year. The absorption ratio of nitrogen, phosphorus and potassium is about 13:1:8.

1, fertilization principles: eucalyptus fertilization should first meet the needs of eucalyptus for various nutrients; secondly, to achieve an appropriate amount, with the minimum fertilizer input to achieve the maximum economic benefits; thirdly, to master fertilization methods to improve fertilizer use efficiency.

2. Base fertilizer: combined with organic fertilizer, 0.25-0.5 kg special fertilizer for eucalyptus is applied to each plant. Generally, 1-2 weeks before planting, combined with digging topsoil backfill.

3. Topdressing: one month after planting or after the young tree grows 1 meter high, topdressing shall be applied to each plant with compound fertilizer or eucalyptus special fertilizer of 0.2-0.3 kg to promote the early growth and rapid growth of eucalyptus. Topdressing once from March to April of the second year, applying 0.3-0.5 kg of compound fertilizer or eucalyptus special fertilizer per plant. Topdressing once in the third and fourth years, applying 0.5-0.8 kg compound fertilizer or eucalyptus special fertilizer per plant to promote the rapid growth of eucalyptus.

4. Fertilization method: 30 cm away from the root, in the uphill direction of the root, open a crescent-shaped fertilizer ditch or open a fertilizer hole above the root, on the left and right sides, and cover the soil after application to prevent fertilizer loss.

5, precautions: before each topdressing, weeds must be removed to avoid weeds competing for fertilizer; it is best to apply fertilizer after rain, and the fertilizer is easy to be absorbed; the ridge, the soil is thin and thin, should apply more fertilizer, the gully valley, the soil is thick and fertile, should apply less fertilizer, adjust measures to local conditions, use reasonable amount, save cost and improve benefit.

Disease and pest control of eucalyptus

1. Disease control

Scorch wilt, bacterial wilt, stem rot and gray mold are common diseases of fast-growing eucalyptus.

The main manifestation of scorch blight is that there are gray-green water stains at the junction of healthy tissue and disease spot, and the leaves are drying up and falling off quickly. Ralstonia solanacearum can occur in the whole growth cycle of fast-growing eucalyptus, which mainly shows that some or all of the leaves wilt, dry and droop, and wither within a few days. Stem rot is characterized by white watery spots at the base of the stem, followed by brown and black. Botrytis cinerea is characterized by the formation of fungal mold on the surface of the plant. The prevention and control of diseases of fast-growing eucalyptus should adhere to the policy of giving priority to prevention and combining prevention and control. First of all, it is necessary to carry out thorough disinfection in the process of planting, to prevent and control germs along with the seedlings, to maintain the normal drainage system in the planting area, and to cut off the transmission of germs. Attention should also be paid to rational fertilization. In addition, you can also choose Bordeaux liquid, chlorothalonil, methyl thiophanate and other chemicals to sterilize.

2. Pest control

Soil termites are common pests of fast-growing eucalyptus trees, which usually occur in the young forest stage. termites first harm the rhizomes of young plants, then turn to the surface and ground and strip off the main roots and roots along the topsoil, resulting in the seedlings unable to transport nutrients and die. The prevention and control of ant damage should be based on prevention and bait. During afforestation, 3 ~ 4 g carbofuran can be placed in the hole and mixed with soil base fertilizer to fill the hole, and 0.35kg can be used per 667m2. After afforestation, 2g carbofuran can be placed at a distance of 5m from the tree bag, 0.22kg per 667mz. Care should be taken to avoid drug damage caused by drug powder contact with tree seedlings. Fast-growing eucalyptus is one of the fastest growing tree species in the world. Reasonable cultivation techniques are of great significance to increase the yield of eucalyptus. Every link of planting and management of fast-growing eucalyptus will affect its final yield. The use of scientific planting technology, and strengthen the prevention and control of diseases and insect pests, will be able to achieve the goal of rapid production.

3. Weed treatment

After laying the 5-wire thick 1m2 black film manually, press the surrounding edges with soil, so that the wind can not open. Or use a thinner agricultural plastic film (1 × 1 or 1.5 × 1.5), it is recommended to use 1.2 to 1.5 meters wide agricultural film ribbon laying is labor-saving and time-saving. It is estimated that the cost of 1m2 black film (non-degradable) is 0.35 yuan per plant, and the price of using agricultural plastic film (biodegradable) is 0.16 yuan per plant, and the life span can generally reach 10 to 12 months. The method of using agricultural plastic film does not need to weed within one year of use, and has a good effect of heat preservation, water conservation and insect prevention.