Soil improvement composition for relieving drought and salt composite stress as well as preparation method and application of soil improvement composition

The invention belongs to the technical field of wheat cultivation, and particularly relates to a soil improvement composition for relieving drought and salt composite stress and a preparation method and application thereof. The soil improvement composition for relieving drought and salt composite stress is prepared by compounding soil microorganism arbuscular mycorrhizal fungi and a water-retaining agent as main components, and the composition comprises 1-3 parts of an arbuscular mycorrhizal fungi inoculant and 0.5-1 part of a water-retaining agent. The composition provided by the invention can effectively improve and increase the accumulation of dry matters in winter wheat, improve the chlorophyll content and proline content in leaves, and enhance the antioxidant enzyme activity and photosynthetic performance of wheat plants, thereby improving the resistance to drought and salt composite stress. 本发明属于小麦栽培技术领域，具体涉及缓解干旱和盐复合胁迫的土壤改良组合物及其制备方法与应用。该缓解干旱和盐复合胁迫的土壤改良组合物是以土壤微生物丛枝菌根真菌和保水剂为主要成分复配而成，组合物中包括丛枝菌根真菌菌剂1-3份，保水剂