Summary: the whole subtropical and warm temperate zone of the country can be grown in semi-dry areas, which, according to the conditions of the successful seeding areas, require warm soil and drought resistance. The selection of forested land is therefore subject to the consideration of moisture conditions, the moisture of the soil is high, but the long-lived soil is not well-growing, requiring wet, fertile, deep and well-watered soils to be cultivated on the four sides of the dam, valleys, streams, hills, and river alluvials。
Themes: squirting techniques
Seed reproduction
1. Cropping
It's 30 to 40 years old and healthy. Seeds of under-maturity are of poor quality, have low seeding rates and have almost no seed capacity。
Shrimp seed matures in late october and mid-november, and when the ball matures, the ball is yellow and brown, it is ploughed in time when the scab is thinly split, and the seed is dispersed late. When the ball fruit is recovered, it is exposed, often flipped, and for 10-15 days it is completely split and the seed is removed, with a seed of 5-6 kg per 100 kg and a budding rate of 5-10%. Seeds are then collected to remove impurities and unsaturated and poorly developed seeds. Pure seed is sealed in containers such as bags or tanks。
B. Feeding
The nursery grounds are selected for good drainage, soil estrangement and irrigation, and the nursery areas are finely organized and base fattening is applied and pests in the soil are sprayed with insecticides. Between march and april, seeds began to grow, 15 days later, and 20 days later, when seeds began to grow, spread from 20 cm to 1. 5 kg per acre. After seeding, seedling beds are managed better, soil is kept wet, seedbeds are covered, not too thick, seedlings are released and gradually decovered over time, and water is sprayed with a canteen to avoid impacting the seedling bed. In the growth of seedlings, care management needs to be strengthened, such as weeding, pine soil, fertilization, pest control and timely irrigation。
Ii. Plug-in reproduction
1. Establishment of a nursery
And leave the seedlings in a nursery, or in a nursery established for it, as a seedling. Earning plants are best produced between one and five years, with young trees of more than five years being used as seedling trees with low root rates. The trees in the seedlings shall be improved in order to grow strong branches and to provide more and better stickers。
2. Selection of slots
Select the branches of the two to five-year-old larvae as an insect. The branches chosen vary from season to season, from spring to spring to spring to spring, to summer to spring to spring to spring and autumn to autumn to spring to spring to spring to spring to spring. Jing will be full of winter sprouts and strong branches。
3. Plug-in methods
(1) spring plug: the best period is before the winter sprouts will swell but not begin, that is, at the end of february and early march. It is 12 cm long and 7 cm deep. Plug-in density is appropriate for 60 bars per square metre. Half a month later, the lumbers are sprouting out of fresh stalks or leaves, but the sprouts do not take root, in the form of fake work, and they are usually involved in about one centimetre at the cut for about three months, and they may grow into new roots. During periods of fake work and rooting, management is to be strengthened to keep the soil humid, but not much moisture is to be found, and the tungsten is to be removed in a timely manner and pine soil is to be fertilized several times, so that a year-old tree can reach a height of 70 cm and have a roughness of 1 cm。
(2) summer plug: in may-july, with half-woodly twigs with 4-5 feathers on the back, 16 centimetres long, 6 centimetres inside the soil and 180 strips per square metre. At this time, the physical activity of the insects is strong and the nutrients are consumed, and it is generally necessary to build a shelter. Beds should be carefully managed, with care to keep the soil moist, so that roots can take place in about 25 days, with higher root rates。
(3) autumn plugs; carried out in august-september, with a lumbered and semi-timberized branch tops, with 400 sticks per square metre, with roots around 40 days later, but no new branches have emerged. At the onset of the next spring, they will be transplanted to other nurseries and continue to grow into seedlings。
In order to allow for early rooting, increase the incidence of rooting and increase rooting, the alkaline acid solution may be used to treat the ear. In general, the 50 ppm concentration is 20-24 hours for the hard branch and 5-6 hours for the young branch; the 300-500 ppm concentration is also used to treat the young branch for 3-5 seconds。
Afforestation methods
1. Selection of afforestation land
The entire subtropical and warm temperate zone of the country can be grown to semi-dry areas, and the conditions in the areas where the seeding has been successful are such that the sprouts require warm soil and are resistant to drought. The selection of forested land is therefore subject to the consideration of moisture conditions, the moisture of the soil is high, but the long-lived soil is not well-growing, requiring wet, fertile, deep and well-watered soils to be cultivated on the four sides of the dam, valleys, streams, hills, and river alluvials。
2. Range of plant
The aquarium is radiant, growing fast and not too dense, with 110 plants per acre to be cut down once in 10 years, with a range of 3 x 4 metres. By 15 years, it will be deforested again at a distance of 4 x 6 metres. Walk trees and garden trees can be planted in a single row with a distance of 2 metres. 3. Plantation methods
A tree of two to three years' worth (up to 2 metres and about 4 centimetres thick) is planted along with it, which is transported over long distances, soaks its roots into the stream, so that it is fully inhaled before planting。
(b) land-to-ground: inter-forest food production requires comprehensive land cleaning and application of decomposition organic fertilizers. 50 x 50 cm tree ponds with appropriate application of base weight。
The afforestation season: yunnan province was suitable for the month of january-february, but also for a month before the onset of the winter, partly one month before the onset of the roots. The planting of seedlings is a little earlier than the planting of water and management。
Iv. Care management
After afforestation, care management should be strengthened, with the best seasons being watered to prevent livestock abuse, with two to three weedings and pine fields to be performed each year, in april-may and in july-october. In areas where conditions exist, fertilization can be done once in the winter。
V. Main pests and diseases
1. Catastrophe (landary disease)
It is mainly caused by sickle, fungus, fungus, fungus, etc., which causes inverted death or sprouts。
Prevention and treatment: the nursery land needs to be selected where the drainage is good and the soil is not heavy. In the case of a herd field, the seeding is disinfected: 1-1 per seed with an enemy gestone. 5 kg, or quintozene zinc amalgam (3/4 quintozene and 1/4 quintozene), or sunon 6401, 2 per acre. 5-3 kg, where the medicine is mixed into the fine soil (the ratio of the drug to the soil is 1:200-400) and distributed into the seedbed; or 8-10 kg of iron-sulphate powder per acre is used evenly with 30-40 times the amount of dry ground, before planting it into the seedbed soil. In the event of the discovery of a disease in a seedling, it can be sprayed with the sumon 6401 wettable powder 800-1,000 times more liquid, or 70% digsone 1:500-800 times liquid, or 5,000 times new jel. If 1 to 3 per cent of the sulphate is used, the spray must be washed with water, otherwise it is vulnerable。
Ii. Scientific science
During the high-temperature and dry summer, the tree base is easily burned and infected with the disease; the soil is poorly drained and water accumulates, and the trees are poorly grown and vulnerable to disease and death. In serious cases, 90 per cent of that year's seedlings died, as did the trees that were born in 2-4 years。
Methods of prevention and treatment: in the summer, young seedlings are required to take shade measures to improve management so that they are not burned。
3. White wire worms
80% dbcp milk, 6 kg per acre, 30-50 kg per pound of water, and soil fumigation in the first half months of planting or transplantation. The application depth is 20 cm below the surface。
Four. Big bagels
When this bug occurs, leaves are eaten up, affecting the growth of trees。
Prevention and treatment: artificial capture and burning of larvae. 90% trichlorfon 800-1,000 times more liquid or 1,000 times more pine。
