Study on the effect of different grass and bean mixture treatments on forage quality and soil nutrients in the Sanjiangyuan area

Studying fodder quality and nutrient changes in the Sanjiangyuan area of Qinghai Province is crucial for improving the growth of grassland livestock breeding since it is a significant location for livestock breeding. Three distinct sowing ratios, a single sowing control treatment, and four mixed sowing combinations of grass and legume fodder were utilized in this experiment to examine the impact of forage nutritional quality and the impact of mixed sowing on soil improvement.The results showed that compared with Avena sativa treatment and × Tritical Wittmack treatment, the content of neutral washing fiber in mixed-sowing combination decreased by 0.03% ~ 16.87% and 0.09% ~ 21.40% , respectively, the content of acid washed fiber was 0.01% ~ 17.53% lower than that of OAT and 0.04% ~ 20.65% lower than that of triticale. The content of crude protein increased by 15.58% ~ 31.53% , and the content of crude fat increased by 0.09% ~ 26.83% , the content of soluble sugar in forage increased by 31.33% ~ 49.68% than that of single-sown Gramineae. Total phosphorus, total potassium, total nitrogen, and total organic carbon soil nutrient content of forage at various mixing ratios was lower than that of the grass treatment, effectively improving the forage’s rate of soil nutrient absorption, and the overall content of soil nutrients was fairly balanced. Oats and forage peas were mixed (50 ꞉ 50), and this method was determined to be superior in terms of forage quality and soil development. It might be used in alpine regions.