Can rubber trees be planted in Qingdao in the current season?

The climate of Qingdao can't grow rubber trees, with low temperature and insufficient precipitation.

Analysis and explanation:

Qingdao is located in the north temperate monsoon region and belongs to the temperate monsoon climate. There is a lot of sea fog in Qingdao, with an average annual fog of 5 1.3 days and light fog 108.2 days.

The annual average temperature in urban areas is 12.7℃, with an annual average of 662. 1mm, and it is coldest in June with an average temperature of -0.5℃.

Rubber trees like high temperature, high humidity, calm wind and fertile soil. It is required that the annual average temperature is 26 ~ 27℃, and it can grow and produce gum normally in the range of 20 ~ 30℃. They are not cold-tolerant, and will be frozen when the temperature is below 5℃.

The average annual precipitation is required to be 1 150 ~ 2500mm, but it is not suitable for planting in places with low humidity.

So Qingdao is not suitable for planting rubber trees.

Cultivation techniques:

Rubber plantations are mostly located in hilly areas, and the construction of terraces is beneficial to soil and water conservation. There are several forms, furrow terrace, horizontal terrace and walking around the mountain.

Generally, the planting density is higher in areas with poor land and severe wind disasters, and the planting density is thinner in areas with good rubber planting conditions. If we keep 25 plants per mu in the cutting area, we can get higher yield. It is advisable to plant 33-37 plants per mu in Hainan, with a spacing of 3×7 or 3×6.5 meters.

Planting hole: length, width and depth = 70cm× 60cm× 60cm. After digging the planting hole, you should be exposed to the sun for a month and then return to the surface soil. Apply bio-organic fertilizer 10 kg to each hole, and add some quick-acting fertilizer to the farmyard manure fermented by yourself, doubling it.

Standard for strong seedlings: sprout and sprout: green shoots sprout, and the diameter of rootstock is not less than 1 cm (off the ground15 cm); Brown bud budding, rootstock diameter more than 2 cm.

Bag bud grafting: 2 ~ 3 leaves are needed; Three-tree high-cut bud grafting: the diameter is required to be more than 3 cm.

Planting depth: the planting depth of the bud pestle pile should keep the bud node 2 ~ 3 cm above the ground, the lateral roots should not be exposed, and the buds should not be buried in the soil. The cut bud grafting seedlings should be buried in the soil, while the bag seedlings should keep the original planting depth.

Planting direction: The buds of bud grafting piles generally face northeast or north to reduce direct sunlight. In hilly areas, flower buds face the inner wall of terraced fields, and in areas with strong wind, flower buds face the main wind direction to prevent young stems from being blown away at the base.

Compaction by returning to soil: Planting bare-rooted seedlings by returning to soil in layers, usually by returning to soil for 3-4 times, so that the roots are in close contact with the soil, which is beneficial for the roots to absorb soil moisture and improve the survival rate.

When planting, the main root should be vertical, the lateral root should be stretched, and the lateral root should not be broken from the base. When planting bag seedlings, first cut the bottom of the bag with a knife, put the bag into the hole, pull the plastic bag to a half height from bottom to top, expose it from the soil column, then return it to the surrounding soil for slight compaction, and then pull out the remaining plastic bags and continue to return to the soil for compaction.

Tidy up the hole surface: after returning the soil, tidy up the hole surface into the shape of basin bottom and cover it with grass and water. In hot and dry weather, branches with leaves are needed for shade.

When planting in dry days, the holes should be watered one day in advance, and then planted after the hole soil is wet. If there is no rain after planting, it should be watered every 3 ~ 5 days until the first canopy leaf is stable, and it is advisable to plant it in heavy rain.