Preparation method of nutrient gel, nutrient gel and application of nutrient gel

The invention discloses a preparation method of a nutrient gel, the nutrient gel and application of the nutrient gel. The preparation method of the nutritional glue comprises the following steps: (1)crushing fruit peels, and treating the crushed fruit peels in steam or boiling water to passivate the activity of pectinase so as to obtain enzyme-killed fruit peel raw material; (2) soaking the enzyme-killed fruit peel raw material in water, heating, pressing to remove juice, and rinsing with clear water to obtain a juice-removed fruit peel raw material; (3) pouring the juice-removed fruit peel raw material into a jacketed kettle, adding water, regulating the pH value to 1.5-2.0 by using industrial hydrochloric acid, heating, filtering, adding amylase, and heating again; adding activated carbon for decoloration; and (4) concentrating the decolored filtrate, and drying the concentrated decolored filtrate by adopting a precipitation drying method to obtain the nutritional gel. The nutritional gel has a regulation e