沼液施用对西兰花耕作土壤微生物特性的影响

以常规施肥作为对照,研究西兰花种植前和收获后沼液施用对土壤微生物数量、酶活性和养分含量的影响。结果表明:西兰花种植前,沼液施用使细菌和放线菌数量分别增加了91.16%和79.09%,真菌反而减少了55.03%;沼液施用土壤脲酶和蔗糖酶活性比常规施肥分别低了27.01%和15.58%。西兰花收获后,沼液施用土壤脲酶和蔗糖酶活性比常规施肥分别增加了13.18%和11.50%。西兰花种植前和收获后,沼液施用分别使土壤有机质含量提高79.61%和29.46%。沼液施用可增加西兰花种植前土壤细菌和放线菌数量,促进西兰花收获后土壤脲酶和蔗糖酶活性和提高土壤有机质含量。

Effects of Biogas Slurry on Soil Microbial Characteristics of Broccoli

Objective]Method]Conventional fertilization was used as control. Effects of biogas slurry application on soil microbial biomass, enzyme activity and nutrient content before and after harvest in broccoli were studied. Result] Results showed that the number of bacteria and actinomycetes under biogas slurry application were significantly greater than those of conventional fertilization before broccoli planting, the differences were 91.16% and 79.09%, respectively. While the number of fungi under biogas slurry application lower than those of conventional fertilization before broccoli planting, the differences were55.03%. The soil urease activity and invertase activity under biogas slurry application lower than those of conventional fertilization before broccoli planting, the differences were 27.01% and 15.58%, respectively. The soil urease activity and invertase activity under biogas slurry application greater than those of conventional fertilization at broccoli harvest, the differences were 13.18% and 11.50%, respectively. The soil organic matter contents under biogas slurry application greater than those of conventional fertilization before broccoli planting and at broccoli harvest, the differences were 79.61% and 29.46%, respectively. Conclusion] In conclusion, biogas slurry application can increase the quantity of soil bacteria and soil actinomycetes before broccoli planting. Biogas slurry application can improve soil urease and invertase activity, and soil nutrient content at broccoli harvest.