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 Tang Dynasty, Tang Xuanzang returned from the Western Heaven and brought back nameless vegetables. He visited Li Shimin of Emperor Taizong, who praised him greatly and named him "Silver Bar" as a court dish. Emperor Qianlong of the Qing Dynasty and hundreds of officials praised it as a treasure of diet.

Silver bar is a specialty of yanshi city, China, which is 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 Bar was a tribute to the court during Hongzhi period of Ming Dynasty.

Yanshi silver bar has a long history of planting, with white and bright color, dense texture, white and tender color, crisp and refreshing, and has the functions of relieving alcohol, relieving boredom and stimulating appetite. This 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 studying 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 the Qing Dynasty and hundreds of 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 sugars, phenols, vitamin C, crude protein, amino acids, organic acids and other substances, which have a unique effect on softening blood vessels, reducing blood lipids and improving blood circulation. Silver bars like light and moisture, and are especially suitable for cultivation in sandy soil. Sowing around the vernal equinox, the seedlings in Grain Rain are well-proportioned, and they enter a 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 white, tender and crisp, and has the functions of eliminating boredom, refreshing mind and stimulating appetite. This 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 dual-purpose vegetable variety for medicine and food, 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 bars are oval, the roots are delicate, tender, crisp and juicy, white and sweet, and they are not resistant to drought, and they die when they encounter frost, and underground stems can survive the winter. Silver bars are moist and suitable for cultivation 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 the cultivation should choose loose and fertile sandy soil plots with good irrigation and drainage conditions. The application of plantar fertilizer is mainly based on high-quality farmyard manure, supplemented by plant ash, phosphate fertilizer and diammonium. In the middle and late March, soil preparation, high border, width 120cm, height 20cm, watering and drainage. Reasonable close planting, digging out the underground stems after germination and screening them, and picking the tubers with thick and symmetrical tubers and full buds as seeds. Planting in the first half of April, the stem is divided into segments, each segment is 10- 15cm long, and each segment has 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 will 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 of 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 Everdeen. Pests and diseases mainly include 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.

Biological characteristics:

I. Requirements for environmental conditions

Silver bars are not drought-tolerant, and die in case of frost, and underground stems can overwinter. 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 autumn, the aboveground parts grow slowly, the absorbed nutrients accumulate, and the underground tubers begin to swell and grow. During the first frost, the aboveground part died and underground tubers formed. Silver bars are moist and suitable for cultivation 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, and the tuber is delicate, tender, crisp and juicy, white and sweet, with a general yield of 750 kg per 667 square meters.

2. Silver bars for fertilization and soil preparation belong to shallow root system, so loose and fertile sandy soil plots with good drainage and irrigation conditions should be selected for cultivation. The application of plantar fertilizer is mainly based on high-quality farmyard manure, supplemented by plant ash, phosphate fertilizer and diammonium. In the middle and late March, soil preparation, high border, width 120cm, height 20cm, watering and drainage.

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. Planted in the first half of April, the stem is divided into segments, each segment is10-15cm long, and each segment has 2-3 complete buds. When planting, ditches 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, it will be watered once for 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 to grow vigorously, it can be cored or sprayed with carbendazim for control, and weeds in the field should be pulled out at the same time. In case of summer rainstorm, pay attention to drainage. In mid-August, the weather gradually turned cold, the aboveground parts grew slowly, and underground stems began to grow. In this period, phosphorus and potassium fertilizer were the main topdressing, and foliar spraying fertilizer was combined 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. The average output per 667 square meters is 500 kg, and the high yield can reach 1000 kg. 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 of 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 Everdeen. Pests and diseases mainly include 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.