There is a kind of "silver bar" in vegetables. What is this?

Silver bars, also known as grass silkworms, arhat dishes, snail dishes and so on. , are staple foods, such as underground tubers, crispy meat, no fiber, salt, sauce, cold salad and so on. , unique flavor and rich nutrition. Rich in protein, fat, carbohydrates and amino acids, it is a famous vegetable variety for both medicine and food.

Silver bars have a long history of planting. According to legend, in the 19th year of Zhenguan in the Tang Dynasty, Tang Xuanzang returned from the scriptures and brought back nameless vegetables. He visited Li Shimin of Emperor Taizong, who praised him and named him "Silver Bar" as a court dish. Emperor Qianlong of Qing Dynasty and officials praised it as a treasure of diet.

Silver bars are a specialty of yanshi city, China, which are similar in shape and taste to mung bean sprouts.

Yanshi is located in the alluvial plain of Luo Yi, with mild climate and moderate water quantity, and is the origin of silver bars. According to the Records of Yanshi County, Yanshi silver bars were paid tribute to the imperial court during Hongzhi period of Ming Dynasty.

Yanshi Yintiao has a long history of planting, which is white and bright, dense in texture, white and tender in color, crisp and refreshing, and has the functions of relieving alcohol, relieving boredom and stimulating appetite. It is a famous cold dish at various banquets.

According to legend, in the 19th year of Zhenguan in the Tang Dynasty (AD 645), Tang Xuanzang returned from the scriptures and brought back nameless vegetables to visit Li Shimin of Emperor Taizong, who praised him greatly and named him "Yintiao". Emperor Qianlong of Qing Dynasty and officials praised it as a treasure of diet. As a court dish, it was planted in Yanshi, the hometown of Tang Xuanzang.

According to modern scientific determination, silver bars are rich in saccharides, phenols, vitamin C, crude protein, amino acids, organic acids and other substances, which have a unique effect on softening blood vessels, lowering blood lipids and improving blood circulation. Silver bars are light-loving and moisture-resistant, especially suitable for cultivation in sandy soil. Sowing around the vernal equinox, the seedlings in Grain Rain are well-proportioned, and they enter the vigorous growth period in June and July. The curing period of silver bars is about 300 days, and the average yield per mu is 1800-2500 kg.

A New Raw Material for Industrial Extraction of Stachyose —— Silver Bar

Yintiao is an annual compositae plant. Silver bar was originally a wild edible plant. Its staple food is underground rhizome, its meat is crisp and tender, without fiber, and it can be pickled, sauced and cold mixed, with unique flavor and rich nutrition. Rich in protein, fat, carbohydrates and amino acids, it is tender and refreshing, and has the functions of relieving boredom and stimulating appetite. It is a famous cold dish at various banquets. It has the unique functions of softening blood vessels, reducing blood concentration and improving blood circulation. It is a famous vegetable variety with edible and medicinal functions, and it is also a green health food. As a new raw material for industrial extraction of stachyose, it has high yield, low cost and high economic benefit. At present, Cologne Industry is carrying out large-scale industrial seedling production with silver-regulated energy through non-experimental, efficient and rapid plant propagation technology.

The leaves of silver bar are oval, the rhizome is delicate, tender, crisp and juicy, white and sweet, not tolerant to drought, and will die when it encounters frost, and underground stems can survive the winter. Silver bars are wet and suitable for planting in sandy loam with deep upper layer, rich organic matter, fertility and good drainage. The suitable temperature for growth is 20-28℃, and the suitable temperature for tuber growth is 20-25℃. Slow growth at low temperature has the unique functions of softening blood vessels, reducing blood concentration and improving blood circulation.

Silver bar belongs to shallow root system, so loose and fertile sandy land with good drainage and irrigation conditions should be selected for cultivation. Base fertilizer is mainly high-quality farmyard manure, supplemented by plant ash, phosphate fertilizer and diammonium. Soil preparation will be carried out in the middle and late March, and the border will be high, wide 120cm and high, and the border will be watered and drained. Reasonable close planting, after the underground stems of Yintiao germinate, dig out the underground stems, screen them, and select the tubers with strong and symmetrical tubers and full buds as seeds. Planting was carried out in the first half of April, and the stem was divided into segments, each segment was 10- 15cm long, and each segment had 2-3 full buds. Digging ditches when planting, with the ditch depth of 4-6 cm, plant spacing of 10 cm and row spacing of 25 cm. After planting, the silver bars are slowly unearthed and germinate in about 30 days. When the stem grows to 10 cm, water topdressing, weeding and intertillage are carried out once. There are few pests and diseases in silver stripe, and the main pest is Liriomyza sativae, which can be controlled by spraying 2000 times 40% deltamethrin emulsion or 2500 times Aifuding. Pests and diseases are mainly rot, which should be removed in time after the onset and disinfected with lime. At the initial stage of the disease, 200× 10 (negative 6th power) agricultural streptomycin can be used for root irrigation, or 800 times 70% thiophanate methyl wettable powder and 500 times 65% zineb wettable powder for prevention and control.

Biological characteristics:

I. Requirements for environmental conditions

Silver bars are not drought-tolerant, they will die in case of frost, and underground stems can survive the winter. The suitable temperature for growth is 20-28℃, the suitable temperature for tuber growth is 20-25℃, and the aboveground part mainly grows in summer. After beginning of autumn, the aboveground parts grew slowly, assimilated nutrients accumulated, and underground tubers began to swell and grow. In the first frost, the aboveground part died and underground tubers formed. Silver bars are wet and suitable for planting in sandy loam with deep upper layer, rich organic matter, fertility and good drainage.

Second, the key points of cultivation techniques

1, the variety is Yanshi Yintiao, and the main variety is Henan. The plant height is 59-70 cm, the leaves are oval, the tubers are delicate, tender, crisp and juicy, white and sweet, and the average yield is 750 kg per 667 square meters.

2. Fertilization and soil preparation silver bars belong to shallow roots, so loose and fertile sandy soil plots with good drainage and irrigation conditions should be selected for cultivation. Base fertilizer is mainly high-quality farmyard manure, supplemented by plant ash, phosphate fertilizer and diammonium. Soil preparation will be carried out in the middle and late March, and the border will be high, wide 120cm and high, and the border will be watered and drained.

3. Sow in time, and plant in a reasonable density in the middle and late March. After the underground stems of Yintiao germinate, the underground stems are dug out and screened, and the tubers with thick and symmetrical tubers and full stems and buds are selected as seeds. Planting in the first half of April, dividing the stem into segments, each segment is 10- 15 cm long, and each segment has 2-3 full buds. When planting, furrows should be dug, with a depth of 4-6 cm, a plant spacing of 10 cm, a row spacing of 25 cm, and seeds of 20-35 kg per 667 square meters.

4. Field management silver bars will be slowly unearthed after planting and will germinate in about 30 days. When the stem height reaches 10 cm, water it once, and carry out topdressing, weeding and intertillage. In summer, the aboveground part is closed and grows rapidly. In case of drought, water and topdressing in time. If it is found that it grows vigorously, it can be pitted or sprayed with paclobutrazol to control it, and weeds in the field should be pulled out at the same time. In case of heavy rain in summer, pay attention to drainage. In mid-August, the weather became colder, the aboveground parts grew slowly, and underground stems began to grow. During this period, phosphorus and potassium fertilizers were mainly used as topdressing, and chemical fertilizers were sprayed on the leaves to promote the transportation and accumulation of photosynthetic products.

Harvest in late May and June, 10. After the first frost, the aboveground parts wither and die, which can be harvested and listed one after another. Until the next spring. 500 kilograms per 667 square meters on average, and the high yield can reach 1000 kilograms. In order to improve the quality of harvesting, try to avoid digging underground stems when digging.

6. Pest control There are few pests and diseases in silver stripe, and the main pest is Liriomyza sativae, which can be controlled by spraying 2000 times of 40% deltamethrin emulsion or 2500 times of iveden. Pests and diseases are mainly rot, which should be removed in time after the onset and disinfected with lime. At the initial stage of the disease, agricultural streptomycin 200× 10 (negative 6th power) can be used for root irrigation, or 70% thiophanate methyl wettable powder 800 times solution and 65% zineb wettable powder 500 times solution can be used for control.