The light transmission rate was 30%.[Result]The results showed that the P.sibiricum Red.under plastic cover had less photoinhibition of photosynthesis than those in bare land.

• [结果]结果表明,在遮阴条件下,与露天栽培的黄精相比,透光率为30%25塑料网遮阴可以降低直射光对黄精的光抑制强度;