Evaluation of ecological and economic benefits of annual Avena sativa L.and perennial artificial grassland in Guinan County
In order to clarify the ecological and economic benefits of different types of artificial grass-land in the Qinghai-Xizang Plateau,physical quantity method and input-output ratio model are adopted to quantitatively evaluate the ecological and economic benefits of annual Avena sativa L.arti-ficial grassland monoculture,sowing period adjustments and mixed sowing(Avena sativa L.plus Vicia sativa L.)as well as Elymus breviaristatus cv.Tongde,Elymus sibircus cv.Tongde and Poa Pratensis cv.Qinghai of perennial artificial grassland.The results show that:(1)The ecological and economic benefits of mixed sowing artificial grassland are higher under different planting techniques.Besides,the ecological and economic benefits of annual Avena sativa L.mixed sowing artificial grassland are significantly higher than those of perennial mixed sowing artificial grassland.(2)The total value of ecosystem services,the amount of C absorption,the amount of O2 released and the content of soil or-ganic carbon of different types of artificial grassland vary significantly under different planting tech-niques(P＜0.001).The annual Avena sativa L.mixed sowing artificial grassland has the highest ab-sorption of C and release of O2.The evaluation results of ecological and economic benefits show that annual Avena sativa L.mixed sowing artificial grassland is the most advantageous grassland.The re-sults can provide scientific basis for the establishment and management of alpine artificial grassland.
NETL
NSTL
万方数据
