The silver needle, also known as the white needle, one of the treasures of White Tea. because of its white, such as silver, the shape of the needle and so named. Silver Needle Tea's aroma is fresh, soup color light yellow, taste fresh and cool, is the best in white tea, known as " beauty " , " king of tea " in tea. Its fresh leaf raw material is all tea bud, pick standard is one bud one leaf, grow about 3 centimeters. The silver needle is suitable for the general population to drink, the taste is warm and cold, has the effect of antipyretic heat treatment and detoxification, and is often used as medicine.
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Cultivation technology of straw mushroom
Straw mushroom is a high-temperature apple rot fungus. Under natural environmental conditions, cultivation can usually be carried out only when the average daily temperature reaches 23°C or more. The 6-8 months of the year in our province is the cultivation season of straw mushroom. The main varieties of black-potted mushrooms are V23, V5, V981, V202, and white pinus have V844. Piles can be grown indoors and outdoors. The main cultivation materials include rice straw and wheat stalks, and the auxiliary materials are lime, compound fertilizer and the like. Indoor or greenhouse cultivation, to the ground level, no water. Under fruit trees, paddy fields or other outdoor places, trenches should be drained to create a turtle-shaped dove with a width of 80 to 100 cm, a height of 10 to 20 cm, and an unlimited length. Pressurized. Well sheds above the mushroom farm. 1 Medium production 1.1 Mother culture medium 1 Potato 200 g; glucose 20 g; agar 20 g; water 1 000 ml, pH 7.50-8. 2 200 g potatoes; 20 g glucose; 1 g potassium phosphate monobasic; 1 g potassium phosphate monobasic; 0.50 g magnesium sulfate; peptone 2 g; vitamin B 15 mg; water 1 000 ml, pH 7.50-8 . The pH was adjusted with a 1% sodium hydroxide solution, added dropwise, and measured once per one drop. It can be sterilized with a 24 or 26 cm high-pressure rice cooker and maintained for 30-40 minutes. 1.2 Primary and cultivating medium 1 Rice straw (chopped or crushed) 85%, bran or rice bran 10%, gypsum powder 1%, lime 4%, water content 60%, PH value 8-9. The raw materials were weighed according to the medium formulation and straw was pretreated. Straw pretreatment: For every 100 kilograms of chopped or crushed into small pieces of straw below 5 cm, use 4 kg of lime and mix or soak in water for 3 to 6 hours. Do the heaping or lifting and composting for 4 to 6 days. Turn in the middle 1 time. Spread the fermented straw and mix it with other accessories. The moisture content is 60%, that is, the material is grasped by hand and the hand feels wet after loosening the hand. When the moisture content is high, the bran or rice bran content may be appropriately increased, or the excess water may be spread out, the PH value may be adjusted to 8 to 9 with lime, and then sterilized at atmospheric pressure after the fashion bottle is sterilized at a temperature of 100°C. , Maintain for 8 to 10 hours, and then for a while. 2 Cultivation Techniques 2.1 Straw Composting Fermentation Liquor plus 3 to 5 kg per 100 kg of straw, and 5 to 10 hours of water immersion, build the heap. When building a heap, supplementary materials can also be added: 5% of plant ash, 5% of dry cow manure and 2% of gypsum. The cement floor was selected during the composting process. A layer of straw with a thickness of 40 cm was laid. The haystack was 1-1.20 meters wide and 2 meters long. The upper 1/2 was mixed with good accessories and the other was covered with 30 cm thick straw. The remaining materials were spread on top of the second layer of straw, and then about 30 cm thick straw was spread. If the water content is low, spray water can be humidified. After spraying dichlorvos or dimethoate to kill insects, cover with a thin film to moisturize and keep warm. In the middle of the pile, it was piled up for a total of 6 days. 2.2 Piles of grass and sowing The torrefied rice straw is twisted into an “∞†shape, twisted and solidified as much as possible, and tied with several straws. Or tie the straw 1/3 from the two ends with a straw rope. Spread a thin layer of straw on the soil and lay it on the concrete floor in the room, about 100 cm wide. Spread a circle of bacteria within 10-20 cm from the outer edge of the paved straw. Place the neat end of the grass outwards. After finishing a layer, a layer of bacteria should be sown on the outer edge of the grass at 5-15 cm. Then spread the second layer of grass, the grass to shrink inwards about 4 cm, so repeat the 4 to 6 layers. Two layers of grass on each floor fill the gap with wet grass and practicality, and the excess bacteria is sprinkled on the surface of the haystack. After fermentation, the accessories are sprinkled on the grass surface and on both sides of the base. In the process of sowing the grass, one foot per pile is to be stepped on. After the grass is sowed, it is covered with long straw and covered with straw curtains. If the temperature is low or there is cold air attack, cover the film. The distance between the haystack and the haystack is 60-100cm. 2.3 Mycelium growth and mycelium management The growth of mycelium was observed 2 days after sowing, and mycelium growth was observed over 4 to 5 days. The temperature in the reactor is usually kept within 24 to 48 hours and reaches 50°C or higher. After 48 hours, the temperature drops slowly. The temperature of the outer layer of the haystack is controlled at 35 to 40°C. If the temperature exceeds 40°C, the film and straw curtains must be exposed to heat and heat. Mushroom buds are formed with water sprayed on the front of the straw, and usually spray water on the fifth day, and the buds form on the seventh day. For outdoor cultivation, if shading is not enough, shade shelters should be used. If it is cultivated indoors or in greenhouses, indoor air relative humidity should be kept between 85% and 95%. The humidity of rice straw should be about 70%, that is to say, a few straws should be taken from the middle of the haystack and twisted by hand to seep out of the water without dripping. If water drops, it will be too wet, and if not, it will be dry. When mushroom buds occur, they should not spray grass directly with water, and the humidity is not enough to humidify the air spray. During the period from sowing to mushrooming, proper ventilation and ventilation should be observed. When the mushroom grows to a large finger, if the air humidity is low and the culture material is dry, it can be sprayed and humidified, and the water spray can be used to increase the humidity of the culture material and prevent the young mushroom from being dry and dry.