Breeding mode of Manglietia yuyuanensis

Generally, hilly land with fertile soil is the best choice for nursery land, carefully leveled and sown in February-March. In order to prevent the disease of Manglietia lactiflora caused by water accumulation in nursery, it is necessary to build a high bed. Generally, the emergence period of Manglietia yuyuanensis is from early March to early April. At this time, the seedlings are delicate and delicate, and the resistance is extremely poor, so they must be protected in time and effectively. Therefore, when the seedlings begin to be unearthed, it is necessary to take out the covered straw in time and build a shade shed to prevent the sun and heavy rain from causing irreparable losses to the seedlings. In addition, it should be noted that it is best to use sprinkler irrigation when watering seedlings at seedling stage. After the seedlings are unearthed, they should be sprayed with pesticides every 7- 10 days to control pests and diseases (carbendazim and thiophanate methyl are 800 times more effective). In addition, it should be noted that spraying is the best way to water at seedling stage.

Seedling stage

Generally, the seedling stage of Manglietia yuyuanensis is from early April to late June, and the growth rate is slow in the first 40 days, and then it will accelerate. The key to seedling stage is to take measures to protect seedlings in time, that is, to transplant seedlings in rainy weather during the period from May to early June, so that the seedlings in the nursery are evenly distributed. At the beginning of June, attention should be paid to spraying carbendazim to prevent frequent scorching of Manglietia lactiflora this month, and to strengthen the monitoring of seedlings of Manglietia lactiflora. Once the diseased seedlings are found, they must be pulled out in time. In this rainy season, irrigation should be timely and appropriate, pay attention to the drainage of nursery land, and prevent the problem of stagnant water and rotten roots. A small amount of topdressing can be applied to the seedlings around mid-June, and the mixed fertilizer with low nitrogen and high phosphorus can be applied to promote the growth of underground roots and lay a good foundation for the rapid growth period in the future.

Rapid growth period

Generally, the end of June to the end of September is a period of rapid growth, about 90 days. During this period, the seedlings grew rapidly, and the roots on the ground and underground also grew rapidly. The growth height of seedling height is about 72% of the annual growth, and the branches and leaves also grow rapidly, forming a perfect vegetative organ. This period plays a key role in the quality of seedlings. So we should do a good job of management. The seedlings should be watered and fertilized. Shading should be removed at the end of July and the beginning of August, and topdressing should be done every 15 days 1 time. Irrigation and topdressing of seedlings will not be stopped until September. Spraying drugs regularly once a week to prevent and control pests and diseases.

Late growth stage

The late growth stage is the last stage of seedling raising, which generally lasts from the first ten days of 10 to the middle of February of 12. During this period, the high growth rate of seedlings will gradually decrease and finally stop at 12. The main task at this time is to promote the lignification of seedlings and improve their resistance to low temperature and drought. After the formal winter, it is necessary to take reasonable anti-freezing measures such as covering the seedlings. Plant seedlings. After the land is leveled, open holes and return them to the topsoil. The hole size is uniformly defined as 60 cm× 60 cm× 40 cm, and the stones, roots and thatch in the holes are cleaned. Each hole is applied with about 0. 1 kg of calcium, magnesium and phosphorus. In addition, in order to promote soil maturation and accumulate moisture, it is necessary to backfill the topsoil into the hole and make it higher than the hole surface 10 cm. Finally, the seedlings were planted in February according to the experimental design. Weed and loosen the soil for the planted seedlings regularly, and topdressing in June-July within 2-3 years after planting, with the fertilization amount of 0. 1 kg per compound fertilizer.