强还原处理和施用有机肥对设施蔬菜地土壤质量的影响

Reductive soil disinfestation (RSD) and organic fertilizer application have been successfully used in preventing and controlling soil continuous cropping obstacle. To evaluate their effects on soil quality, we took the degraded facility vegetable soil as the research object anddesigned six treatments: soil (CK), soil unfertilized, flooded and mulched with plastic film (FF),soil amended with chicken manure (OF1), soil amended with Sesbania cannabina (OF2), soil amended with chicken manure, flooded and mulched with plastic film (RSD1), soil amended with Sesbania cannabina, flooded and mulched with plastic film (RSD2).We measured a total of 25 soil chemical and biological indicators, used principal component analysis (PCA) and correlation analysis to construct the minimum data set (MDS), evaluated soil quality based on soil quality index (SQI) and finally verified the rationality of MDS. Results showed that the MDS comprised total nitrogen (TN), total carbon (TC), available phosphorus (AP), dissolved organic carbon (DOC), ammonium nitrogen (NH4+-N), pH, microbial biomass carbon (MBC), microbial biomass phosphorus (MBP), bacterial Chao1 index (BChao1) ,fungal Chao1 index (FChao1)andβ-1, 4-acetylglucosaminidase (NAG). MBC、TN and TC are key influencing factors of soil quality. Compared to the CK treatment, the OF1, OF2, RSD1, and RSD2 treatments significantly improved soil quality index (SQI) by 87.34%, 96.02%, 90.19%, and 91.08%, respectively. The SQI ranged from 0.487 to 0.510 and significantly improved from a low level to a moderate level. Therefore, RSD and organic fertilizer application can improve soil quality. This study provides a scientific basis for the sustainable development of facility vegetable industry.