Nutrition bag technique is a critical step in the cultivation of Morchella.However,the extensive use of wheat grains as the primary ingredient in nutrition bags conflicts with China's agricultural development principle of'not competing with hu-mans for grain'.The experiment was carried out in Xinglong Township,Dafang County,Bijie City,with 12 nutritional bag for-mulations to investigate the effects of varying wheat grain content and auxiliary additives on Morchella yield.The results demon-strated that the wheat grain content significantly influenced the yield,with the formulation containing 60％ wheat grains and 40％ rice husks showed the best overall performance and the highest yield per unit area.Both excessively high and low wheat grain contents were detrimental to yield improvement.Additionally,formulations using a mixture of buckwheat as the main in-gredient yielded significantly less than those with wheat grains only.With the same wheat grain content,the addition of an ap-propriate amount of bran as an auxiliary material significantly enhanced the yield.The study indicates that optimizing the ratio of wheat grains to other auxiliary materials in the nutrition bag is crucial for improving Morchella yield.Considering the effects of all components,it is recommended that the wheat grain content in nutrition bags be maintained around 60％ to achieve stable and high yields.
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