How to choose Robinia pseudoacacia seeds? What are the methods of raising seedlings?

Robinia pseudoacacia, also known as Robinia pseudoacacia, is a deciduous tree of Leguminosae and Robinia pseudoacacia. It is an excellent multi-functional tree species for soil improvement, soil and water conservation, protective forest and "four sides" greening. Native to the United States, Robinia pseudoacacia was introduced into Qingdao from Europe at the end of the 18th century and is now widely planted in China. So how to select the seeds of Robinia pseudoacacia in the process of cultivating Robinia pseudoacacia? What are the methods of raising seedlings? Let's get to know it.

How to choose Robinia pseudoacacia seeds?

When selecting Robinia pseudoacacia seeds, we should pay attention to the purity, germination rate and water content of Robinia pseudoacacia seeds. Generally, the purity (high): ≥ 90%, germination rate: ≥ 60%, moisture (low): ≤ 10%. It is best to choose the seed varieties of Robinia pseudoacacia which are approved and suitable for planting in this area. Before choosing and buying, we should also check whether the dealer has three certificates, and finally choose the seeds with luster, no smell and full particles.

What are the methods of raising seedlings?

1. Land selection and preparation

Robinia pseudoacacia like soil layer deep, fertile, loose, moist loam or sandy loam, in neutral soil, acid soil, saline-alkaline soil with less than 0.3% salt content can also grow normally. Soil preparation requires intensive cultivation, soil preparation and fertilization in autumn, rake to preserve soil moisture in spring, and sowing after irrigation in early May.

2. Seed treatment and sowing

The pods of Robinia pseudoacacia changed from green to reddish brown, and the pods hardened and withered, that is, ripe, seeds should be collected at the right time, and pure seeds should be obtained by sun exposure, removal of pericarp, blighted seeds and inclusions. The skin of Robinia pseudoacacia seed is thick and hard, so it must be treated by accelerating germination before sowing, and it can be sown when the seed germinates 4-5 days later. Sowing around the "Grain Rain" festival is the most appropriate. Strip sowing in border bed or field sowing can be done. Generally use the field type seedling, first the seedling ground is flat, and then open a ditch to sow.

3. Raising seedlings

Choose the nursery land with leeward to the sun, flat terrain and good drainage and irrigation as the hotbed. Then select the annual seedling root with excellent stem thickness of 0.2 cm to 0.5 cm, cut it into 3 cm long root segment, and store it in wet sand. In early March, the roots were evenly placed in the dug hotbed, sprayed with enough water after sowing, covered with 1 cm thick soil, then covered with plastic film in an arch shed, sealed around and dug drains. The bed temperature was kept at 20: 25 ℃ to promote germination. It began to sprout in about 15 to 20 days, and all the seedlings appeared in about 30 days.

4. Transplanting

The seedling land requires that the ground be leveled, 1000 kg of organic fertilizer per mu, 50 kg of ammonium bicarbonate and calcium superphosphate per mu before transplanting, and 50 kg each of ammonium bicarbonate and calcium superphosphate. After comprehensive mechanical ploughing and raking, the ridge is made into a small high ridge with a width of 60 cm, a ridge width of 30 cm and a depth of 25 cm, and a ridge length of about 25 meters. The seedlings were transplanted when they were 5-10 cm high.

5. Seedling stage management

In Robinia pseudoacacia seedling cultivation, mastering the characteristics of drought tolerance, light preference and waterlogging tolerance is the key to ensure the survival of Robinia pseudoacacia seedlings.

Generally speaking, Robinia pseudoacacia grows rapidly, its germination ability and root tillering ability are very strong, so it can grow well by mastering the management skills during the seedling raising period. And the economic value of Robinia pseudoacacia is also very broad, if planted well, it will undoubtedly increase the income of growers themselves.

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