Effects Of Species Patch Pattern And Diversity On Plant Interspecific Interactions And Productivity Of Mixed Grassland

With the gradual improvement of people's living standards,the rigid demand for meat,eggs,and milk continues to grow.In order to solve this situation,through the development of grass husbandry,the development of artificial grassland,and the production of high-quality forage grass,China's agricultural structure has gradually shifted from a food-consuming model to a food-saving model.Pasture mixed planting can maintain grassland ecosystem stability while increasing yield.Mixed-sowing can change the species-to-species-to-species relationship of species,and can obtain higher species diversity and productivity,thereby optimizing the production function and ecological function of grassland ecosystem.In natural grassland,the distribution pattern of the patch is formed by the degree of aggregation of the same species and the adjacent relationship between different species.The effect of patch pattern on the productivity and diversity of mixed-sown grassland,that is,through the changes in the distribution of species and the size and number of patches,affect the use of species in different niches and the competition among species.relationship.The combination of species patching patterns and the diversity of mixed species formed by different species can affect the productivity,stability,and grassland ecosystem services of mixed-sown artificial grasslands by affecting the inter-species interactions within species,thus creating a high-yield,stable-yielding mixed-sown Artificial grassland is of great significance.Through the establishment of artificial mixed-sowing grasslands in the south and north,a two-factor randomized block design was adopted to regulate the intraspecific and interspecific relationships of various forage grasses in the mixed-sowing grassland by adjusting the combinations of different seeding diversity and patch perimeter area ratios.,to explore the relationship between diversity and productivity,interspecific and interspecific relationships of grasses and pastures,to provide a scientific basis for the establishment of high-yield,stable-yielding mixed-sown pastures,and to provide evidence for revealing the diversity-productivity relationship under the influence of intra-species interactions.Ideas.The main findings are as follows:1.By changing the perimeter area ratio to regulate the distance between species can effectively regulate the inter-and intra-species interactions.2.Patch perimeter ratio and species diversity have significant positive effects on grassland productivity,net effects,and overyielding.The two main factors were not significant,changing plant functional traits and nutrient utilization.3.With the increase of the number of species and the change of patch perimeter ratio,the ability of mixed grassland to resist foreign invasion has increased significantly.4.A reasonable mix of pasture combinations and the pattern of distribution can improve the productivity and stability of the mixed grassland.5.The diversity-productivity relationship significantly changed with patch perimeter ratio,which was significantly better than the traditional method of mixed broadcasting.