In the afternoon of October 21, experts from the Science and Technology Department of Qinghai Province organized an evaluation of the scientific and technological achievement "Soil-Grass-Animal Interaction and Regulation of Alpine Grassland Grazing Ecosystem", which was jointly completed by the Northwest Institute of Plateau Biology of the Chinese Academy of Sciences and Lanzhou University, led by the Grassland Adaptive Management Team of Qinghai Academy of Animal Science and Veterinary Medicine. The expert group consists of Professor Zhao Zhichong of Qinghai Minzu University as the chairman, Professor Wang Wenying of Qinghai Normal University as the deputy chairman, and Professor He Jinsheng of Lanzhou University, Professor Shi Shangli of Gansu Agricultural University, Professor Li Xilai of Qinghai University, Researcher Wang Liya of Qinghai Natural Resources Comprehensive Survey and Monitoring Institute, and Researcher Xiao Jiangshe of Qinghai Institute of Meteorological Science as the members. Based on the report and review of relevant information, the expert group, after questioning and discussion, agreed to pass the evaluation of the results and agreed that the research results as a whole reached the international advanced level.
Taking advantage of the "Key Laboratory of Alpine Grassland Adaptive Management in Qinghai Province", based on the alpine grassland grazing ecosystem, taking "four production layers" and "three interfaces" as the theoretical basis, it conducted a systematic analysis of the effects of alpine grassland types (alpine meadow, alpine artificial grassland, alpine grassland and meadowized grassland), grazing livestock species (yak and Tibetan sheep), grazing intensity and grazing methods on "soil-grassland-livestock" over a period of 23 years, and revealed the universal patterns in different types of typical alpine grassland grazing ecosystems on the Tibetan Plateau.
It found that the alpine grassland community structure was stable under moderate grazing intensity, the plant super-compensatory growth effect was obvious, and the primary and secondary productivity was high. The maximum (best) livestock productivity grazing intensity of the alpine grassland ecosystem on the Tibetan Plateau was determined. It revealed that mixed grazing has a positive effect on the maintenance of meadowed grassland community diversity and ecosystem function, and the compensatory growth effect of plants was most significant and livestock productivity was highest when yaks and Tibetan sheep were grazed together at a ratio of 1:2.
The expert group believes that the results provide a theoretical basis for ecological protection and management of grasslands on the Tibetan Plateau, provide technical support for efficient and rational grazing utilization of alpine grasslands, and have important guiding significance for achieving balance and maintenance of ecological functions of alpine grassland ecosystem production and sustainable development of alpine grassland ecological animal husbandry.
(Reported by the Institute of Grassland，Academy of Animal Science and Veterinary Medicine)
