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为探索发酵玉米秸秆施加到盐碱土后对土壤肥力指标的影响，将未发酵的玉米秸秆作为对照，采用盆栽试验方法对比分析了不同比例(1:1、 2:1、 3:1、 6:1) 秸秆和污泥混合发酵的玉米秸秆分别以不同用量(1.25 g/kg、 2.50 g/kg、 3.75 g/kg、 5.00 g/kg)施加到盐碱土后土壤肥力指标的变化。 结果表明， 施加发酵后的玉米秸秆，土壤有机质、速效钾质量分数显著增加，土壤速效氮和速效磷质量分数有所降低。经比较分析，施加 2.50 g/kg 发酵比例为 2:1 的玉米秸秆对土壤肥力指标及土壤酶活性的影响最为显著，其中，土壤微生物量碳、氮分别较原土提高了 0.90 倍、 1.07 倍；土壤碱性磷酸酶、脲酶、纤维素酶、 过氧化氢酶分别较原土提高 54.47 %、 37.00 %、 33.82 %、 59.77 %。
In order to explore the effect of fermented corn stalks on soil fertility index after being applied to saline-alkali soil, un-fermented corn stalks were used as a control. Pot experiments were conducted to compare the effects of different ratios (1: 1, 2: 1, 3: 1, 1) The changes of soil fertility indexes of corn stalk mixed with straw and sludge after being applied to saline-alkali soil at different dosage (1.25 g / kg, 2.50 g / kg, 3.75 g / kg, 5.00 g / kg) The results showed that the mass fraction of soil organic matter and available potassium increased significantly with the application of fermented corn stover, and the contents of available nitrogen and available phosphorus decreased. The results showed that corn stalks with 2: 1 fermentation ratio of 2.50 g / kg had the most significant effect on soil fertility index and soil enzyme activity. Among them, the soil microbial biomass C and N were increased by 0.90 times and 1.07 times respectively ; Soil alkaline phosphatase, urease, cellulase and catalase increased 54.47%, 37.00%, 33.82% and 59.77% respectively compared with the original soil.