[The degradation on cultivated Gastrodia populations and prevention measures].

Objective: To propose views and concepts on the degradation of cultivated Gastrodia populations.

Methods: The differences between natural and cultivated Gastrodia populations were compared and discussed in terms of their biological features, qualities and yields.

Results: There were changes and degradation in biological features and some important properties of yield in cultivated Gastrodia.

Conclusion: The direct reason of cultivated Gastrodia degradation is the ecological disturbace of forests and the decreasing amount of natural Gastrodia populations; The indirect reason is manual pollination and other changes of the natural growing environment.