In the study, far infrared ray nonwoven was used to cover on the surface of soil, then how the far infrared ray nonwoven affect plant growth, moisture content and temperature of soil was observed. The result shows the concentration of 0.8% exhibit the best result in rate of growth about leaf number, fresh weight, oven dry weight and number of storage roots of sweet potato. In this experiment, we discovered that leaf number in the concentration of 0.8% was 84.6 more than that of control. After 5 days, the moisture content of experiment group was about 13.42% better than that of control group.
