Transplanting technique of bare Root of Oil Peony Seedling

Transplanting technique of bare Root of Oil Peony Seedling

As the country pays more and more attention to the development of woody oil industry, oil peony has set off an upsurge of planting in the whole country. The afforestation practice in recent years shows that the survival rate of 2 ~ 3-year-old seedlings of oil peony is high, and the survival rate of afforestation is often very low if the seedlings with older seedlings are selected. In the introduction of oil peony and the implementation of landscaping project, the transplanting technique of perennial seedlings is often needed. In order to solve this technical problem, Xiangyang Forestry Science Research Institute began to conduct experiments and attempts on bare root transplanting of 9-and 12-year-old peony seedlings in 2015, and achieved good results. Through sampling investigation, the survival rate of transplanting can reach more than 95%. In this paper, the management techniques of bare root transplanting of oil peony seedlings are summarized as follows, in order to provide technical guidance for oil peony producers.

1 preparation in advance

1.1 site selection

Peony is a deciduous shrub with developed fleshy roots. The transplanting site should be sunny, deep, fertile, well drained loam or sandy loam, and avoid clay and low-lying stagnant water.

1.2 soil preparation

The selected plots were cleaned and exposed after machine ploughing, and the soil was deeply turned over to the depth of 50cm one month before planting. The soil can be turned over at the same time with the application of base fertilizer and insecticides to prepare for transplanting in autumn.

1.3 dig a fixed planting hole

The transplanting rate of large seedlings was 2475 plants / hm2, the row spacing was 1m × 4m, and the planting holes were dug with specifications of 60cm × 60cm × 50cm. When digging holes, the surface soil and heart soil should be stacked separately, and the bottom of the hole should be flat, taboo pot bottom, so that the roots of seedlings can fully contact the soil, which is conducive to the survival of plants.

(2) transplanting seedlings

2.1 planting time

Autumn is the best time to plant peonies. As the saying goes, "the Spring Equinox plants peonies until he is old and does not blossom". The best time for planting peonies is after the Beginning of Autumn, and it is appropriate from mid-September to late October. At this time, planting is beneficial to the regeneration of peony roots, improve the transplanting survival rate and survive the winter safely. If planted too early, the temperature is too high, affecting survival; planting too late, the temperature is too low, affecting root healing and germination of new roots. Contact information of oil peony seedlings Wechat; 18374545223

2.2 Seedling selection and transportation

Choose strong seedlings that grow well and are free from diseases and insect pests. Seedling transportation should be done with the start, transport, planting, to avoid storage and transportation time is too long. In case of high temperature in autumn, it is best to raise seedlings in small batches and start transportation and planting in time.

In order to improve the survival rate of seedlings, try not to damage the root system and retain the integrity of the root system.

After the seedlings have been raised, they should be tied up in order to facilitate handling, and they should be handled gently in the process of handling to prevent peony bud eyes from being damaged or falling off.

2.3 pre-transplanting treatment of seedlings

2.3.1 Root trimming

Before planting peony bare root seedlings, the roots of peony seedlings can be properly trimmed according to different conditions, mainly to remove senescent roots and injured roots, and to truncate part of the overlong main roots. However, more roots should be retained as far as possible to ensure an adequate supply of nutrients in the process of peony callus.

2.3.2 drying seedlings

If you encounter high temperature and dry weather, you can plant peony in autumn. If it is rainy and humid in autumn, leave the seedlings in a ventilated environment for 2 days. Planting after a slight loss of water can improve the survival rate of seedling transplantation.

2.3.3 Disinfection

Seedlings need to be disinfected before planting. 70% methyl topiramate and methamidophos can be used for disinfection to spray the branches and roots of tree peony. In winter, 3-5 Baumedo stone sulfur mixture can be used to smear the branches to kill the overwintering pests.

2.4 planting methods

Before planting peony, it is necessary to backfill the soft topsoil with a depth of about 1 / 3 of the hole depth, so as to ensure that the roots of the seedlings are in full contact with the soil, which is beneficial to the growth of new roots and improve the survival rate of transplanting. At the same time, according to the dosage of 50g / 100g per hole, the compound fertilizer was applied and stirred well with the soil.

When planting, the peony seedlings are put into the hole to stretch the natural distribution of the root system. First fill the topsoil, then fill the core soil, when the soil is half of the hole, gently lift the seedling left and right by hand, so that the soil can fully fill the heart of the seedling root, and the soil must be solid after filling. The planting depth should be at the level of the root neck or slightly lower than the soil surface.

2.5 watering

After planting, the peony should be irrigated with fixed root water in time to seal the nest, and when the soil is dry, the soil can be loosened to preserve soil moisture.

Do not need repeated watering after sealing the nest, so as not to reduce the ground temperature and is not conducive to the regeneration of new roots of peony. At the same time, too much soil moisture is easy to cause peony root rot and death. Watering in the dry season is appropriate to keep the soil moist, and stagnant water should be removed in time after rain.

Three kinds of post-management

3.1 pruning

After planting, peony should be pruned in time to concentrate nutrients, promote root growth and bloom. Pruning is mainly to cut off the old and weak withered branches, disease and insect branches and over-dense branches, and retain the sturdy branches with flower buds. Pruned branches should be burned or buried deeply.

3.2 florescence management

After peony planting in autumn, the flower buds should be removed in the second year to promote root growth and ensure the survival rate of peony plants.

3.3 fertilization

After applying sufficient base fertilizer in the year of peony planting, there is no need to topdressing. In the second year after planting, it is necessary to apply fertilizer three times a year, and the first pre-flowering fertilizer is carried out in early March to supplement the deficiency of original stored nutrients in roots and branches, which is beneficial to flowering in the same year. The second post-anthesis fertilizer was applied about 15 days after flowering to meet the needs of vigorous branch growth and fruit growth and flower bud differentiation, and lay the foundation for flowering in the coming year. The third fertilization was carried out after the Beginning of Autumn to benefit the nutrition and overwintering protection of peony flower bud growth. Fertilizer can be applied fully mature cake fertilizer according to 0.225~0.300kg/m2 or compound fertilizer according to 50~100g/ plant.

3.4 loosening soil and weeding

After peony blossom, an intermediate ploughing and weeding was carried out at a depth of about 15cm to enhance drought resistance. The summer is high temperature and rainy, the soil moisture is big, the surface is easy to harden, the weeds are easy to grow, so the weeds should be removed in time.

To sum up, the bare root transplanting of oil peony seedlings should grasp five links: first, select forest land and high-standard soil preparation and large hole planting; second, select strong seedlings free of diseases and insect pests; third, in the process of seedling emergence and transportation, try to protect the integrity of peony roots and bud eyes, and do a good job in the effective connection of lifting, transportation and planting; fourth, choose a suitable planting time; fifth, field management should be strengthened after planting. Achieving the above points can effectively improve the survival rate of transplanting and afforestation of peony seedlings, and make the plants grow well.