Impacts of nature reserve policy on regional ecological environment quality: A case study of Sanjiangyuan region.

Uncovering the ecological effectiveness of nature reserve policies will help protect and manage nature reserves in the future. Taking Sanjiangyuan region as an example, we examined the impacts of the spatial layout characteristics of natural reserves on the ecological environment quality by constructing the dynamic degree of land use and land cover change index, and depicted the spatial differences of the ecological effectiveness of natural reserve policies both inside and outside the natural reserves. Combined with ordinary least squares and field survey results, we explored the influencing mechanism of nature reserve policies on ecological environment quality.

[Study on the alkaloids from the stem of Zanthoxylum dissitum].

Objective: To study the alkaloids from the stems of Zanthoxylum dissitum.

Methods: Added ammonia to the 0.5% HCl extract solution of the plants until the pH was 11 to collect the total alkaloids.