There are many tips when harvesting lacquer, when is the most yield to harvest?

From April to August is more suitable, and the quality of paint cut on dog days is the best, because the moisture evaporates quickly in midsummer, the sun is abundant, and the quality of the paint produced is the best. Every day before sunrise is the best time to cut the paint. Paint agricultural mussel shells to cut lacquer trees.

leather, exposing the wood and cutting it into an oblique blade. Mussel shells or bamboo chips are inserted under the knife edge to allow the lacquer liquid to flow into the wooden barrel, which is then sealed with oiled paper for preservation.

At this time, the lacquer is gray and milky white, turns chestnut shell color when it comes into contact with air, and turns brown when it dries. Bessel snow, red as blood, black as iron refers to the process of natural lacquer from liquid to oxidative drying, from light to dark, and finally to form a firm paint film. Suacs are mainly found in the eastern and central regions of Asia.

Sumac trees are found in Vietnam, North Korea, Japan, Myanmar and other countries, but they are not as productive and of any quality as China. MediumNational lacquerThe tree grows in the southern region from southern Gansu to Shandong. Due to the humid temperature and environment, these areas are ideal for the growth of sumac trees.

Sumac is a deciduous tree.

20 meters high. <>

Fangshan District, Beijing.

In Tiankeng National Forest Park, there is a lacquer tree about 30 meters high. Its leaves are oval, oval or ovate-lanceolate. The yellow-green flowers bloom in early summer and turn oblate in autumn with a smooth yellow appearance.

A lacquer tree that grows up to eight years old can still cut lacquer, while a forty-year-old lacquer tree can still cut lacquer.

The natural lacquer liquid cut from the lacquer tree is called lacquer, also known as lacquer.

and national lacquer, also known as gold lacquer. Cooked lacquer refers to raw lacquer that has been oxidized by sunlight, stirring, and tung oil. Natural lacquer is widely used due to its many excellent properties.

It can be used as an important coating for military, chemical, textile, light industry, shipbuilding, mechanical and electrical and scientific and technological products.

It is better to harvest from May to August, because the climate and environment are better at that time, and the yield is large when harvesting.

Harvest in April and May, collect the spilled grease solution, and store it, so that it can be better utilized.

May to August harvest is better and good storage.

I think it's usually better in the fall. Because that's when the production can be at its maximum.

Generally speaking, it is in the middle of the season, when the plants are at their best.

The seeds are generally ripe in the spring, and April and May are the best time to collect the seedsThis is also one of the characteristics of the columbia, because most of the plants are ripe in the autumn, and the lily is vigorous, and the spring has achieved a lot of fruit.

The fruit of the fruit should be collected when it turns yellow-green, the maturity of this fruit is relatively high, and the utilization rate is high, because the water content of the seeds is relatively high, and we can also directly treat it without germination. If you want to store for a period of time until autumn or the next spring to sow seeds, it is also possible, because the old seeds can also be successfully planted, which requires everyone to master certain skills to preserve the seeds. It can be stored in a low temperature environment, or it can be placed in a ventilated and dry place to promote the respiration of seeds.

(1) Harvesting.

It is usually harvested in late April or early May. When the fruit with 2 3 inflorescences turns yellow-green, it is the harvest time and should be harvested immediately. Too late, the fruit is too ripe and turns yellowish-white, it will crack on its own, and the seeds will fall to the ground, reducing the yield; If it is too early, the fruit is still green, the seeds are young and the yield is not high, and it cannot be left as seeds.

Harvesting should be carried out after the dew is dried on a sunny day, and the whole plant should be cut off with a sickle, put it in small piles on the spot, or tie a small handful and transport it back to the drying field for processing.

b) Processing. The whole plant of the harvested coria will be exposed to the sun for 1 2 days, and after the fruit is dry, it can be put into a threshing bucket or a large dustpan, kneaded by hand or threshed with feet, or stacked in the drying field and threshed with a flail. Then remove the stems, leaves, husks and other impurities, and dry the seeds until they are completely dry, and the wind blows clean, which is the finished product. Generally, 50 80 kg of dry seeds can be produced per 667 square meters.

Coded as 1302191000

It belongs to the sap of plants.

and opium are an item.

Of course, the import of opium is prohibited in our country.

Lacquer Lacquer, also known as wood lacquer, soil lacquer, and national lacquer, is a natural coating of milk sweat cut from the bark of the lacquer tree. It is the natural secretion of the metabolic process of the lacquer tree, which is white at the beginning of the outflow, and because it is easy to oxidize, its oxidized epidermis is often seen in black.

Lacquer has the characteristics of acid resistance, alkali resistance, high temperature resistance, corrosion resistance, rust resistance, moisture resistance, radiation resistance, insulation and other characteristics, and is widely used, and is known as the king of coatings. Raw lacquer is used for lacquer handicrafts, wooden furniture, ancient buildings, not only the paint surface is smooth and clean, anti-corrosion and heat-resistant, durable, and the tone is deep and stable, rich in oriental national style. In industry, lacquer is an indispensable coating for enameled wires for submarine cables and electrical appliances, and it is also widely used in shipbuilding, petroleum, chemical and metallurgical industries.

Lacquer is a well-known native product in China, and it is also a traditional export commodity. According to expert research, China's lacquer cultivation has a long history, and lacquerware production originated more than 4,000 years ago. At present, the distribution of lacquer trees in China is mostly in Shaanxi, Hubei, Sichuan, Guizhou, Gansu, Yunnan, Henan and other provinces.

Yunnan Province lacquer production area throughout 13 prefectures, prefectures, cities in more than 50 counties, of which Zhaotong area has the largest output, Zhenxiong County has the best quality. Yunnan lacquer has been exported in history. At present, it is mainly domestic, and it is far from being able to meet the needs of all aspects.

References: Refer to the Practical Manual for Customs Declaration.

The lacquer produced in China is one of the highest economic value and the best quality in the world, and the quantity is also the largest. In 1950, at the beginning of liberation, the national lacquer production was only 260,000 tons. At present, the purchase volume of raw lacquer is about 640,000 yuan.

Figures for total world production could not be found. According to some sources, China's exports account for 80% of the world's exports.

Shanghai green is a variety of Chinese cabbage, the growth cycle is short, and it can be sown in spring, summer and autumn in Shanghai.

Shade nets are needed for summer sowing to cool down and prevent burns. Sowing seeds in early spring and receiving them early to prevent sprouting. There are more insect pests of cabbage, vegetable leaves are used directly, pay attention to drug safety, use low-toxicity and efficient agriculture, and require each pesticide to be used only once in a growing season, and it is best not to use drugs for 2 weeks during the harvest period.

In addition, pay attention to the use of nitrogen fertilizer, do not overdo it.

40 50 days, when it grows to 15 20 cm, it can be harvested.

It depends on how hot you control.

Artemisia annua. 1) The best harvest period is from the peak of growth to before the flowering stage, when the artemisinin content is the highest.

2) The artemisinin content in different tissues of Artemisia annua was as follows: new leaves (7 days old) > old leaves (21 days old leaves) >roots" stems, and there were great differences. The highest content of artemisinin in new leaves is that old leaves have certain development and utilization value, and root and stem tissues have no extraction value.

The flower buds are yellow-green, firm and full, shiny, grow to the extent that this variety should have, the longitudinal grooves of the flower buds are obvious, and the best when the buds are to be released. Most varieties are in the daytime 12:00-14:

00 picking. Picking too early affects the yield, and the color of the product is poor. If the harvest is too late, the petals will crack, the pollen will be scattered, the quality will deteriorate, and the value of the commodity will be lost.

Standard picking time for quick-frozen fresh cauliflower buds: according to the processing requirements, one is to pick the mature buds on the second day on the first day. The second is to pick the flower buds that ripen on the same day in the morning to prolong the freshness time and prevent the flower buds from scattering when processed and eaten.

When picking flower buds, do not damage the young buds and moss, and ask for pedicles without branches. At the same time, the container containing fresh buds should be kept clean and hygienic, lightly loaded and not pressed. The harvested buds are transported to the processing plant or home for processing as soon as possible.

When the bai period is usually in March to April seedlings as well. Select the land to prepare the land Choose a sandy loam with fertile soil and good air permeability, and it is better to be slightly acidic. And DAO carries out deep ploughing and land preparation, after land preparation, the ground is raked flat, and then the soil is disinfected, and the disinfection can be sprayed on the soil with 40% formaldehyde 50 times liquid, and the soil is covered with plastic film immediately after disinfection, and the surrounding soil is compacted.

The plastic film is sealed for 10 days, and then it is uncovered and dried to prepare the land for fertilization.

Fertilization should be opened first, the depth of the ditch is 60 100 cm, the width is about 50 cm, after the ditch is opened, the grass ash is applied to the ditch. and carry out mulching. In this way, fertilization is evenly applied, with about 50 cm between each ditch.

After tidying up the ground in this way, the furrow is now opened, and the furrow is 90 cm wide. After the furrow is tidied up, the edge of the furrow on the side is firm.

In the north, gerberas are mostly grown from Yunnan. Although the cost of cultivation is somewhat high, it is relatively easy to manage in the future, and growers are now using this method. However, if the seedlings have grown for more than one year, they can also be propagated by dividing.

Let's take a look at how to divide the plant.

Propagation method: Robust gerbera adult plants can be propagated by ramification, but only once to ensure good traits of the plant.

Dividing method: You can dig up strong, pest-free plants from mature orchards, and pay attention to ensure the integrity of the roots. Because gerbera is a multi-rooted plant, it is necessary to ensure the integrity of each lateral root when dividing the plant.

Cut it upright with a knife. After cutting the plantlets, remove one-third of the leaves. If it is a small petal that has flowering, it should also go.