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为研究微生物菌剂、酶制剂、化肥不同配比对秸秆还田后土壤酶活性的影响,在陕西眉县横渠镇农场进行了田间试验,测定和分析了土壤酶活性以及土壤养分因子。结果表明:在玉米灌浆期,土壤蔗糖酶和碱性磷酸酶活性均出现峰值,分别为58.30mg、3.85mg,是播种前CK处理的4.7倍、1.5倍;在玉米成熟期,土壤脲酶和多酚氧化酶活性均呈现峰值,分别为4.85mg、1.46mg,是播种前CK处理的3.2倍、8.1倍。微生物菌剂、酶制剂与化肥配施可明显的提高土壤中蔗糖酶、脲酶、碱性磷酸酶、多酚氧化酶活性,其中秸秆还田+常规施肥+增施氮肥+酶制剂+腐解菌剂(SFN+E+D)处理效果尤为显著。除多酚氧化酶外,土壤蔗糖酶、脲酶和碱性磷酸酶活性之间呈极显著正相关;除速效钾外,土壤脲酶、碱性磷酸酶活性与土壤各养分因子均呈显著或极显著相关,蔗糖酶与速效钾呈显著负相关,多酚氧化酶活性与各养分因子相关性均不显著。
In order to study the effects of different microbial inoculants, enzymes and chemical fertilizers on soil enzyme activities after straw returning, a field experiment was conducted in Hengqu Town Farm, Meixian, Shaanxi Province. Soil enzyme activities and soil nutrients were determined and analyzed. The results showed that the activity of soil invertase and alkaline phosphatase peaked at 58.30mg and 3.85mg respectively, which was 4.7 times and 1.5 times higher than CK before sowing. At maize ripening stage, Phenoloxidase activity peaked at 4.85 mg and 1.46 mg, respectively, which was 3.2 times and 8.1 times higher than CK before sowing. The microbial inoculant, enzyme preparation and chemical fertilizer application could obviously improve the activity of sucrase, urease, alkaline phosphatase and polyphenol oxidase in soil, of which straw addition + conventional fertilizer + nitrogen fertilizer + enzyme preparation + decomposing bacteria Agents (SFN + E + D) treatment effect is particularly significant. In addition to polyphenol oxidase, soil invertase, urease and alkaline phosphatase activity was highly significant positive correlation; except for available potassium, soil urease, alkaline phosphatase activity and soil nutrients were significant or very significant There was a significant negative correlation between invertase and available potassium, and the correlation between polyphenol oxidase activity and various nutrient factors was not significant.