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为了探讨施用不同水平的沼液作为追肥对土壤氮、磷、钾的影响,以花叶生菜为试材,开展田间试验,设置8个处理,分别在不施基肥与施基肥2种情况下,分4个水平施用沼液,即0、0.5、1.0、1.5 L,最后检测土壤各项质量指标。结果表明,施用沼液0.5、1.0、1.5 L,土壤全氮含量增幅分别为577.26%、624.14%和666.20%,且差异极显著;土壤有效磷含量增幅分别为89.60%、280.35%和503.37%,且差异显著或极显著;土壤中速效钾含量增幅分别为106.12%、135.62%和169.68%,且差异极显著。不施基肥或施基肥时,施沼液有利于增加土壤中全氮、有效磷和速效钾的含量,且随着沼液施用量的增加,施沼液使土壤中全氮、有效磷和速效钾含量增加的效果增大,施用沼液有利于改善土壤质量。
In order to investigate the effect of applying different levels of biogas slurry as fertilizer on nitrogen, phosphorus and potassium in soils, we conducted field experiments with 8 lettuce lettuce cultivars, The four levels of biogas slurry, ie 0,0.5,1.0,1.5 L, the final detection of soil quality indicators. The results showed that the total nitrogen contents of biogas slurry were increased by 577.26%, 624.14% and 666.20% respectively with application of biogas slurry of 0.5, 1.0 and 1.5 L, and the difference was extremely significant. The increase of soil available P was 89.60%, 280.35% and 503.37% And the difference was significant or extremely significant. The increase of available potassium in soil was 106.12%, 135.62% and 169.68% respectively, and the difference was significant. Applying biogas slurry without biosynthesis of basal fertilizer or base fertilizer was beneficial to increase the content of total nitrogen, available phosphorus and available potassium in the soil. With the increase of the biogas slurry application rate, the application of biogas slurry enhanced the contents of total nitrogen, available phosphorus, Increasing the effect of potassium content increases, the application of biogas slurry is conducive to improving soil quality.