The black fungus is a mesophile fungus, which is usually eared at temperatures above 20°C in the late spring and early summer. Therefore, the moisture requirement is relatively high and the relative humidity should be maintained at 85% to 90%. If the humidity is too low, it affects the primordium formation and fruit body development. However, watering too much can easily lead to the emergence of ear and disease. Practice has proved that using foliar irrigation ear can obtain stable and high yield. The relevant technology is introduced as follows. 1. Fog irrigation facilities consist of dry, branch, and wool three-stage high-pressure polyethylene plastic pipe micro atomizing nozzles and pipe fittings. The trunk diameter is 40-50 mm, the branch diameter is 25-32 mm, and the capillary diameter is 10-12 mm. When installed, the dry pipe connects the water source perpendicular to the branch pipe. The branch pipe is perpendicular to each ear stem. The capillary tube (generally 15 meters long) is parallel to each ear stem and suspended above it. Atomizing spray nozzle spacing of 1.5-2 meters, installed on the same side of the capillary (towards the ear dry), spray the ear dry water. (2) Fog Irrigation Techniques (1) Fog Irrigation Time Each spring is the golden season for the cultivation of black fungus. At this time, fog irrigation can produce 1-2 spring surgeries, and its increased production accounts for over 80% of the total production increase. Therefore, the period from May to June should be regarded as the key period for the production of fog irrigation. If there is no high temperature (below 30°C) in July, adhere to fog irrigation to reduce temperature and humidification, but also to collect 1-2 tidal ear. (2) The time for each fog shall be more than 0.5 hours and less than 2 hours. The length of the fog irrigation time is closely related to the conditions of the weather such as dryness and humidity, temperature and ear dryness and moisture content. The weather is dry, the temperature is high, the water content in the ears is low, and the time of the fog irrigation can be prolonged. On the contrary, the time of the fog irrigation can be appropriately shortened. When the ear has a water content close to the lower limit of the water content suitable for growth of the ear (about 50%), mycelium growth and fruit body development occur. (3) Fog irrigation should be based on intermittent water supply. The water absorption rate should be faster in the early stage of ear drying, and the water utilization rate should be high. Each time the fog irrigation should not be less than 0.5 hours, and the interval between two irrigations should be about 0.5 hours; in the middle and later periods, the irrigation interval can be Appropriately elongated (1 to 1.5 hours). This will not only save water, but also increase the utilization of water, so that the relative humidity of the ear field is suitable, and the disease will not be caused due to excessive humidity, and the ear will grow. (4) The foliar irrigation of factory-planted ear requires factory earing. If temperature control facilities are available, it can be carried out all year round. Factory-grown cultivation uses earliest material (bagged sawdust, cottonseed hulls, etc.) to raise ears. In the row of bags (coded into the wall) ears, during the day 2-3 hours fog irrigation once every 0.5 hours, room temperature is generally maintained at 20-25 °C, air humidity maintained 80% -90%. If there is a high temperature (more than 28°C) weather, it is necessary to increase fog filling at noon to facilitate cooling and warming, which will benefit the growth and development of Auricularia fruit body. This technique also applies to the production of shiitake mushrooms in principle. China Agricultural Network Editor
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