Fig 1.
Forage yield of different cultivated grasslands.
Note: Different letters in the figure indicate significant differences in forage yield among grasslands across different planting years (P < 0.05). (A) illustrates the forage yield of Poa + Elymus mixtures, Poa monoculture, and Elymus monoculture. (B) shows the forage yield of Poa + Festuca mixtures, Poa monoculture, and Festuca monoculture. (C) presents the forage yield of Poa + Puccinellia mixtures, Poa monoculture, and Puccinellia monoculture. (D) depicts the yield stability of different grasslands.
Fig 2.
Stem/leaf ratio, digestible dry matter, dry matter intake and relative feed value of different cultivated grasslands.
Note: Different uppercase letters indicate significant differences among different years within the same cultivated grassland (P < 0.05). Different lowercase letters indicate significant differences among different cultivated grasslands within the same year (P < 0.05).
Fig 3.
Crude protein, crude fiber, acid detergent fiber and neutral detergent fiber of different cultivated grasslands.
Note: Different uppercase letters indicate significant differences among different years within the same cultivated grassland (P < 0.05). Different lowercase letters indicate significant differences among different cultivated grasslands within the same year (P < 0.05).
Fig 4.
Interspecific relationships in different mixed grasslands.
Note: (A) illustrates the relative yields of different mixed cultivated grasslands. (B) depicts the relative total yields of different mixed cultivated grasslands. “*” indicates a significant difference in RYT from 1 (P < 0.05).
Fig 5.
LASSO regression analysis and model evaluation of production performance in cultivated grasslands under mixed-sown and monoculture treatments.
(A) LASSO Regression Model Convergence Results. (B) LASSO Regression Output. (C) ROC Model Prediction.
Table 1.
Weighting of cultivated grassland production performance indicators using the CRITIC method.
Fig 6.
Comprehensive evaluation of cultivated grassland production performance.