Responses of Soil Abiotic Properties and Microbial Community Structure to 25-Year Cucumber Monoculture in Commercial Greenhouses

Cucumber monoculture could cause soil salinization and acidification, soilborne diseases, eventually yield loss. However, after a 25-year in Wafangdian county, Liaoning province, China, cucumber yields have remained satisfactory. In the present study, we investigated how abiotic biotic properties, addition to rhizosphere microbial community structure greenhouses, still sustain plant growth such long-term production. Soil organic carbon, total nitrogen, available nitrogen were accumulated significantly monoculture. Such increasing fertility was accompanied by increased abundance, which reshaped structure. Both bacterial fungal diversity, including observed estimated richness, Heip evenness, Shannon decreased significantly, while period had greater influence on diversity than diversity. Although high accumulation of nutrients salinity acidity, abundance potential pathogenic fungi did not show an obvious increase. These results indicated that maintaining properties using fertilizers balanced chemical fertilizers, especially improving potassium fertilizer application, be useful measurements for sustainable development greenhouse vegetable addition, appropriate management strategies should considered reduce risk salinization.