Baseline:
The Sanjiangyuan region is located in the hinterland of the Qinghai-Tibet Plateau and is the birthplace of China's three major rivers, the Yangtze River, the Yellow River, and the Lancang River. It is considered a "sensitive area" for global climate change. The study found that the overall temperature of the Three Rivers Headquarters showed a rising trend, and the precipitation in the Three Rivers Headquarters showed an overall increasing trend. The annual minimum and maximum temperatures in the Sanjiangyuan region showed a significant increasing trend, and the increase in the cold season was greater than that in the warm season. The change of precipitation tends to be stable, the variability of precipitation decreases, and severe drought or rainstorm events show a decreasing trend; the number of snow days in the south of the Sanjiang source area is the largest and shows a significant increase trend; Advance, shortened snow cover period and decreasing snow cover days. Under the influence of warming, the permafrost degrades severely and causes the development of swamps and wetlands. Under the double influence of increased precipitation and meltwater caused by rising temperatures, lakes and swamps in the Three Rivers Source Region continue to expand.
Natural grassland accounts for about 70% of the total area of the Sanjiangyuan area. Currently, 34% of the degraded grasslands in the Three Rivers Source Region are accounted for, of which 16.5% are seriously degraded grasslands. The consequences of grassland degradation lead to the decline of ecological service functions. Taking Sanjiangyuan as an example, the degradation of large grassland areas will lead to land desertification, including the source areas of the Yangtze River and the Yellow River. After land desertification, the grassland ecosystem's water supply and regulating functions will be lost, and the cultural service function will also be greatly affected.

Main problems:
The degradation of alpine meadows is the combined result of many factors (Wang Baoshan et al., 2007). In the context of climate change, overgrazing, rodent infestation (Li Xilai, 1999), and other problems becoming more and more serious, it is difficult for grasslands to restore their original productivity. According to community surveys, although the current method of restoring grassland vegetation through mechanized planting has improved the efficiency of planting grass and increased the repaired area, there are also problems such as inadequate follow-up management, insufficient community participation, secondary damage, and even repaired areas.
Domestic mechanical planting is currently suitable for areas with relatively flat slopes and terrain. For the Sanjiangyuan area, the deep river trenches, rugged terrain, and areas with high slopes cannot achieve effective sowing. The cost of mechanical planting is also high, and herders cannot afford these costs. We know from the experience of grassland restoration in some areas of Sichuan and Qinghai that annual oats need to be mixed with a certain proportion of local grass seeds to play the role of sand fixation and cold protection, and the annual oats die. It can be used as fertilizer to help restore grassland, but annual oats need to be sown year after year. Otherwise, it will cause the second degradation. Combining the wisdom of the herdsmen, trampling the ground with yaks, burying grass seeds deeply, and fertilizing with yak manure, these local measures have played a role in restoring the grassland with the slightest disturbance. Regardless of whether it is mechanical planting or artificial planting, the biggest problem is still the follow-up management of the restored grassland. Only by continuously investing labor can the herdsmen better protect their pastures, and the cost is not high. While grazing, the herdsmen should manage the livestock well and prevent them from destroying the newly restored grassland at will. They should re-seek the pastures in the coming year and continue to drill and plant the poor-growing areas. The effect of grassland restoration will be better.

Activities:
1. The herdsmen set aside a part of the land to cultivate native grass seeds, and then plant them on the degraded pastures, and carry out post-management, including enclosure, replanting, and gradually expanding the planting area.
2. Establish a local seed bank, reserve abundant local seeds, increase diversity, and meet the grass seeds needed by the herdsmen in the village to expand the planting area and restore the black soil beach. Herdsmen contribute or sell the natural grass seeds they collect to the "seed bank" as qualifications for free and discounted grass seeds.
3. Promote scientific breeding technology, "grazing + supplementary feeding", increase the slaughter rate of unit livestock, combine the action of cultivating natural pasture seeds, plant forage grass with certain supplementary feeding potential in severely degraded areas, and make up for the gap in natural pastures.
4. Formulate seed diversity management methods for alpine meadows, develop experimental technical parameters for natural grassland restoration, and establish a herdsman technical service team to help herdsmen in the village and neighboring villages to carry out natural grassland seed cultivation, guide herdsmen to scientifically breed yaks, and improve Unit slaughter rate and economic benefits, and reduce the overall number of livestock.

Anticipated results:
1. The area of protection and cultivation of natural grass seeds has increased by 1,000 mu, and 500 kilograms of natural grass seeds have been produced, which can meet the grass seeds needed by 15% of herdsmen in the village to restore grasslands.
2. The number of herdsmen participating in the natural forage seed base construction is 30 per year, with an increase of 60 households every two years, and each herdsman contributes 10 kilograms of natural grass seeds.
3. The construction of the natural pasture seed base was completed, and 30 herdsmen were supported to complete the planting area of 600 mu of forage grass, which met the needs of 5% of the herdsmen in the village for supplementary feeding in winter.
4. Treat 500 mu of black soil beach in the village, and restore 5% of its vegetation coverage within two years.
5. Create a grassland ecological restoration case report and promote the project experience. 80 herdsmen participated in the promotion.