1.一種制備蛹蟲草子實體產品的方法，包括如下步驟：（a1）采用種子強化培養基培養蛹蟲草菌株，得到種子強化培養物；（a2）將步驟（a1）得到的種子強化培養物接種至液體種子培養基中進行培養，得到液體種子；（a3）將步驟（a2）得到的液體種子接種至子實體富硒培養基中進行培養，得到蛹蟲草子實體；所述種子強化培養基的原料配比為：1L營養液甲：0.5-1.5kg小米；所述營養液甲中含有濃度為1.5mg/100ml-20mg/100ml的硒；所述液體種子培養基中含有濃度為0.9mg/100ml-10mg/100ml的硒；所述子實體富硒培養基的原料配比為：100-150ml營養液乙：100g小麥籽粒；所述營養液乙中含有濃度為1.5mg/100ml-20mg/100ml的硒；所述蛹蟲草菌株為蛹蟲草菌（Cordyceps militaris）50383，ACCC編號：50383或蛹蟲草菌（Cordyceps militaris）FY1421，保藏編號為CCTCC NO: M2016220；所述硒為有機硒；所述硒是以富硒酵母粉的形式加入培養基中的；所述營養液甲由溶質和溶劑組成；所述溶質及其在所述營養液甲中的濃度如下：富硒酵母粉1-3g/100ml、葡萄糖0.5-1.5g/100ml、蛋白胨0.5-0.7g/100ml、磷酸二氫鉀0.05-0.15g/100ml、硫酸鎂0.04-0.06g/100ml、維生素B1 1-3mg/100ml、維生素B2 0.5-1.5mg/100ml、甘氨酸0.2-0.4mg/100ml、蘇氨酸0.2-0.3mg/100ml、纈氨酸0.1-0.2mg/100ml、亮氨酸0.04-0.06mg/100ml、異亮氨酸0.05-0.15mg/100ml、苯丙氨酸0.2-0.3mg/100ml、絲氨酸0.05-0.15mg/100ml、脯氨酸0.04-0.06mg/100ml、羥脯氨酸0.02-0.04mg/100ml、半胱氨酸0.01-0.03mg/100ml、色氨酸0.02-0.03mg/100ml、甲硫氨酸0.04-0.06mg/100ml、賴氨酸0.05-0.15mg/100ml、谷氨酸0.04-0.06mg/100ml；所述溶劑為水；所述液體種子培養基由溶質和溶劑組成；所述溶質及其在所述液體種子培養基中的濃度如下：馬鈴薯浸出粉0.5-1.5g/100ml、葡萄糖0.5-1.5g/100ml、富硒酵母粉0.5-1.5g/100ml、蛋白胨0.4-0.6g/100ml、氯化鈉0.05-0.15g/100ml、磷酸二氫鉀0.02-0.04g/100ml、磷酸氫二鉀0.04-0.06 g/100ml、硫酸鎂0.04-0.06g/100ml、維生素B1 1-3mg/100ml、維生素B2 0.5-1.5mg/100ml、甘氨酸0.2-0.4mg/100ml、蘇氨酸0.2-0.3mg/100ml、纈氨酸0.1-0.2mg/100ml、亮氨酸0.04-0.06mg/100ml、異亮氨酸0.05-0.15mg/100ml、苯丙氨酸0.2-0.3mg/100ml、絲氨酸0.05-0.15mg/100ml、脯氨酸0.04-0.06mg/100ml、羥脯氨酸0.02-0.04mg/100ml、半胱氨酸0.01-0.03mg/100ml、色氨酸0.02-0.03mg/100ml、甲硫氨酸0.04-0.06mg/100ml、賴氨酸0.05-0.15mg/100ml、谷氨酸0.04-0.06mg/100ml；所述溶劑為水；所述營養液乙由溶質和溶劑組成；所述溶質及其在所述營養液中的濃度如下：葡萄糖0.5-1.5g/100ml、蔗糖0.4-0.6g/100ml、富硒酵母粉1-3g/100ml、蛋白胨0.5-0.7g/100ml、磷酸二氫鉀0.02-0.04g/100ml、磷酸氫二鉀0.04-0.06g/100ml、檸檬酸鐵銨0.02-0.04g/100ml、氯化鋅0.02-0.04g/100ml、硫酸鎂0.04-0.06g/100ml、維生素B11-3mg/100ml、維生素B20.5-1.5mg/100ml、維生素B110.5-1.5mg/100ml；所述溶劑為水。2.權利要求1所述方法制備得到的產品。3.如權利要求2所述的產品，其特征在于：所述產品滿足總硒含量為280mg/kg以上。
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