Effect of grazing on grassland soil respiration

Soil respiration in grassland ecosystems is affected by abiotic factors such as soil temperature, soil moisture, soil organic content and radio of carbon to nitrogen. Meanwhile, the effect of biological factors such as leaf area index, plant photosynthesis, vegetation litter, root biomass and soil microorganism, of human activities on grassland ecosystems also exist. Perhaps grazing is one of the main effects on soil respiration because the grazing can influence the soil physical structure and chemical composition seriously. The paper reviewed the influence of specific changes of these factors on grassland soil respiration and provided a certain reference value for studying soil respiration of grassland ecosystems.