The use of Duanmu cultivation of black fungus, although in our country has more than 300 years of history, but for many years, in addition to purification and rejuvenation of bacteria and species, mainly rely on natural production, and lack of scientific management. In response to this situation, the soil fertilizer station in Xiangfan City, Hubei Province, carried out experimental studies on the effects of nitrogen, phosphorus, potassium, trace fertilizers, hormones, and plant growth regulators in black fungus production areas in Baokang, Nanzhao, and Gucheng. Has achieved better results. The technical selection is now described as follows: What kind of nutrition is good? What is the effect? (1) According to the test results of 6 points: Phosphorus, potassium have a significant effect on promoting the growth of black fungus, nitrogen only with a reasonable allocation of phosphorus and potassium have a superior effect. The combination of 1% superphosphate and 0.5% potassium sulfate can not only increase production, but also increase the total amount of amino acids and the eight essential amino acid contents, reduce the crude fat content, and improve the quality. (2) According to the test results of 4 points, it is shown that among the six kinds of microelements tested, the yield increase with iron and boron is best. In addition, among various plant hormones and plant growth regulators tested, triacontanol and α-naphthalene acetic acid are more effective. Triacontanol and α-naphthalene acetic acid not only increase the production of black fungus by about 30%, but also increase the production of black fungus. Improve quality and mature 2-3 days in advance. In summary, in order to make high quality and high yield of black fungus, it must be supplemented with suitable amounts and proportions of nitrogen, phosphorus, potassium and other elements, as well as trace elements such as iron, boron, and zinc, supplemented by the application of triacontanol, a - Naphthyl acetate and other hormones and regulators. 2. How to add nutrition to black fungus? (1) Choosing the best fertilizer and hormones and regulators, and mastering the application concentration. A large number of element fertilizers can be selected with 1% superphosphate and 0.5% potassium sulfate in combination, or 0.2% ammonium sulfate, 1% superphosphate and 0.5% potassium sulfate in combination; Trace element fertilizer can use 0.02%-0.04 ferrous sulfate or Borax; hormones and plant growth regulators can use 0.3%-0.5% PPM triacontanol and 5PPMa-naphthylacetate. When economic conditions allow, large amounts of elemental fertilizers, trace element fertilizers, hormones, and plant growth regulators can be applied in combination. (2) Master the application method and application technique. Fertilizers or sprays of hormones and plant growth regulators on black fungus are generally carried out in the young ear. In early spring and late autumn, the temperature is relatively low, and it can be sprayed at noon. In summer, the temperature is high, sunny days should be sprayed after 4 pm, and cloudy days can be sprayed all day. Before spraying, the selected fertilizers, hormones and plant growth regulators were dissolved in warm boiled water and formulated to the desired concentration and placed in the sprayer. Spray fertilizer in front of one person, one person behind the pole, asked to spray evenly across the front and back of the ear, spray until drip. In the event of a drought, drought resistance (direct spraying or pouring of water) will begin on the afternoon of the second day after spraying, stopping for two days after 5-6 days of continuous drought resistance (generally if the temperature is appropriate, ear can be collected once), if it does not rain, Continue to fight drought until it closes. If it does not rain for a long time, the ear rods covered with branches, straw, etc. can be used for drought resistance during the day and the coverings can be uncovered at night in order to maintain suitable temperature and humidity conditions. If it does not rain after 6 hours, it will need to be sprayed after rain. Once each ear is collected, fertilizer should be sprayed once, combined with other management measures such as weed removal, bacteria removal, disease prevention and pest management, etc. to ensure the harvest of black fungus.