The primarybiomass of the grassland community decreased with increasing grazing intensity.
较大的放牧压力下，群落中适口性差、耐牧的杂类草植物渐趋 增加。
2
The primarybiomass used for surfactant production usually is as follows: cellulose, lignin, starch, chitin, oil and fat and pine oleoresin(an exudate of pine trees) and so on.
开发表面活性剂的生物质资源有纤维素、木质素、淀粉、甲壳素、油脂和松脂等。
3
The prediction of current primary forest showed that it was steady during the next 300 year period, the number of trees and the biomass of Korean pine changed very little.