Dongtai Town, Dongtai City, Jiangsu Province is located on the coast of the Yellow Sea and is the center of Dongtai’s politics, economy and culture. With the acceleration of urbanization and industrialization, the per capita arable land area has become increasingly tense. The town has fully tapped the resource potential of the local rivers and used the Italian poplar as the main planting tree to implement the river slope afforestation project.
There are more than 140 river courses in Dongtai Town with a total length of 305.7 km. Plan to plant Yiyang on both sides of the river slope, planting more than two rows on each side. After the project is fully implemented, it can increase the afforestation area by several thousand mu. This not only saves arable land and completes the task of afforestation, but also cleans the river slope, dresses up the river, greenens the environment, and prevents soil erosion. After four years of hard work, 7 deep-gorge river channels have been put in place, and most of the canopy closures have reached above 0.4, and some trees have a DBH of 13 to 15 cm, which has achieved good economic and ecological benefits.
1. Wrecked land preparations Most river slopes in Dongtai Township were planted with arundoes in the early 1980s, which caused difficulties in afforestation on the slopes. The town has adopted a method of removing artificial repellent rhizomes combined with the chemical eradication of herbicides, with significant results. After the evacuation is completed, the excavation pond will be set up and the upper and lower soils will be piled up separately to promote the soil maturation after winter-spring freezing and thawing.
2. The selection of seedlings for planting seedlings is a prerequisite for improving the survival rate of Italian poplar. Large seedlings and seedlings have high nutrient and moisture content, take root early after planting, grow fast, have strong resistance to drought, pests and other undesirable environments, and have a high survival rate. 72 Yang and 35 Yang with strong local adaptability are preferred. Seedling standard: more than 3 meters high above the ground, seedlings dry straight and robust, full lignification of the tip, the top bud full; underground root system developed and complete, lateral roots, fibrous roots more than 30 cm above the root; the whole plant without pests and mechanical damage .
3. Immersing seedlings means that poplar is a fast-growing tree species, with loose tissue and long-distance transportation and planting. For the seedlings that cannot be planted with the trees, it is recommended to soak the whole seedlings with water before planting, and the soaking time should be 24 to 72 hours. Practice has proved that the survival rate of seedlings soaked for 3 days is more than 25% higher than that without soaking, and the shoot tip rate is reduced by 30%. The survival rate of seedlings can generally be stabilized at 90% or more.
4. Proper planting and appropriate selection of planting density is one of the important links for fast growing and high yielding of Italian poplar. Due to the limited slope width of the river slope, the “product†shape cultivation pattern with double row planting, small row spacing and large plant spacing is adopted. The plant spacing is 2 to 2.5 meters, 5 meters or 3 meters and 4 meters, to make full use of space and improve ventilation. Light conditions.
5. Seasonal selection The conventional planting of Italian poplar can be performed after falling leaves in autumn or before budding in spring. The fall planting time should be controlled from late November to early December and not later than mid-December. The spring planting is mainly local, and the time is controlled in mid-to late-March. At this time, the soil temperature rises quickly, which is conducive to the growth and germination of roots and leaves, thereby increasing the survival rate. Special attention should be paid to the fact that when the soil is frozen at low temperatures, it should not be planted.
6. The part of the seedlings planted in the seedlings of the big seedlings of the Dayang deep planting can produce adventitious roots from the cortex, increase the root layer, and expand the absorption area. Therefore, the deep planting of the Datong seedlings facilitates the seedlings to fully absorb the water and mineral nutrients in the deep underground, and enhance drought resistance. , It will help improve the survival rate of seedlings. Datang deep planting standards: pond diameter, depth of not less than 80 cm, seedling planting depth of not less than 60 cm. Apply 500 grams of phosphate fertilizer or ternary compound fertilizer and 10 kg of farmyard manure or manure fertilizer to each pond. Mix well with the soil to make basal fertilizer to avoid direct contact between the roots and the fertilizer. Planting methods can be summarized as "three burials and two stepping and one raising seedlings": that is, about 1/5 of the topsoil should be filled in first, then the seedlings should be placed in tree ponds to extend the root system, fill the soil to 2/3 depth, and raise the saplings upwards. To mention mentioning that the soil is in close contact with the root system, practical, and then filled with soil, and then practical, so that when repeatedly 15 to 20 cm away from the ground, pour water once, and the amount of water is sufficient to fill the tree ponds until the water seeps. The saplings are righted, rammed, and plowed, and the soil is shaped like a hoe. Where conditions permit, the Tangkou can be covered with a plastic film to increase soil temperature, maintain moisture, reduce weed damage, and promote the survival of tree seedlings.
7. Feeding management Yi Yang roots, hair leaves, pumping branches should have sufficient water supply, especially in April and May the temperature is warming, sap flow, seedlings grow vigorously, more water is needed, this period is called Critical period of water. Generally, it is necessary to water once every 5-7 days when the weather is fine and without rain to keep the soil moist.
In addition, due to local typhoon-prone areas, seedlings are often exposed to wind and rain, and are prone to tilting and tripping. When this happens, it is necessary to timely correct, cultivate soil, and be pragmatic. At the same time, prevention and control of loose soil, weeding, and pests and diseases (common diseases and insect pests include ulcer disease, grass reeds, Yang small moths, and Sang Tianniu, etc.) must be done in a timely manner.
After Yi Yang survives, in principle, do not dilute for 3 years to increase the amount of foliage and improve the ability of photosynthesis. However, attention should be paid to removing competitive techniques and diseased branches in time to maintain the top edge and promote trunk growth so as to obtain early economic benefits.
Mobile type led medical device lamp not only can examination but also used in dental operation, ear operation or pet operation. Mobile Examination Lamp, divided into lamp head, spring arm and battery. Bulb service life more than 50000 hours, convenient to move and safe. Floor Type Examination Lamp, good color temperature control: By using color temperature compensation technology, the color reversion is uprised.
Examination Light,Examination Lamp,Hoisting Surgical Lamp,Medical Examination Light
Shandong qufu healthyou Medical Technology co.,Ltd , https://www.kangerjian-medical.com