施用沼肥对保护地蔬菜栽培土壤理化性质的影响

Effects of Biogas Fertilizer on Soil Physical and Chemical Properties in Protected Culture Field

本文以等有机质含量的猪粪、沼渣为基肥,追肥(化肥与沼液)以等N、等P、等K进行施用,采用二裂式区组设计的方法,研究了沼肥、猪粪、化肥等不同施肥组合对保护地土壤pH值及土壤速效养分含量的影响。结果表明:番茄收获期,各处理土壤pH有下降的趋势,但没有酸化现象发生;施用沼渣在防止土壤pH值下降方面有较好的作用;施用沼渣、沼液在提高土壤有机质含量方面的效果分别优于施用猪粪、化肥,沼渣与沼液配合施用在提高土壤有机质及碱解N含量方面效果显著,猪粪与化肥配合施用有利于提高土壤速效P和速效K的含量。

Effects of different applying combination of biogas fertilizer witL pig manure and chemical fertihzer on soil pH value and content of available nutrients in protected field were presented. Split-plot design was adopted in the experiment. Pig manure and biogas fertihzer were utilized as base fertilizer in which organic contents were equivalent; and chemical fertihzer and biogas slurry were used as top fertilizer in which N,P and K contents were equivalent. The results showed that, for all the treatments, pH value of tile soil had tendency of dropping in tomato harvest stage, but no acidifying occurred, and appLcation of sold biogas fertilizer could prevent the pH dropping. Application of biogas fertihzer, specially when tLe sold and hquid biogas fertihzer applied combinely, has better benefit effect on improving soil organic content and alkali-hydrolyzable nitrogen than pig manure or chemical fertilizer, while combination of pig manure and chemical fertilizer was favorable to increase the content of available phosphorus and potassium in soil.