Agar activated carbon hydrogel for soilless culture of seeds and preparation method of agar activated carbon hydrogel

The invention belongs to the technical field of plant soilless culture, and particularly relates to agar activated carbon hydrogel for soilless culture seeds and a preparation method of the agar activated carbon hydrogel. The method comprises the following steps: adding agarose and activated carbon into water according to a mass ratio of the water to the agarose to the activated carbon of 1: 0.01: (0.001-0.004), and carrying out ultrasonic treatment on the obtained solution for 1-1.2 hours; heating the solution to 95-98 DEG C, stirring, and stopping stirring when the agarose is completely dissolved; and standing and cooling the obtained solution to obtain the agar activated carbon hydrogel. Pure agarose hydrogel is poor in mechanical property, and agarose hydrogel filled with activated carbon has good mechanical property, thermal stability and highly developed pore structure and is beneficial to improving the water absorption capacity of the hydrogel, so that the seed germination rate is increased. According