The problem could be properly solved if new technology of turtle rearing without sand is adopted.

The results are as follows: (1) in the experiment of the static ryegrass hydroponic cultivation, the ryegrass appeared a good adaptability to the turtle-breeding wastewater.

Generally, the substrata and water quality of pond are easily polluted in soft-shelled turtle culture within greenhouse, and purification is not only time-consuming but energy-wasting.