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在三江平原布置长期试验,研究连年施用有机肥后土壤腐殖质变化及其对白浆±Fe、Mn、Al形态转化及磷生物有效性的影响。结果表明,施用牛粪后土壤腐殖质含量升高,且以松结态腐殖质的增长为主;土壤的DTPA提取态和有机络合态Fe、Mn、Al含量上升,使土壤有效态磷含量上升。因此,生物措施是治理白浆土,促进土壤磷素养分有效性上升,增大土壤缓冲容量和抗逆性的有效措施。
Long-term experiments were conducted in the Sanjiang Plain to study the changes of soil humus and the effects on the bioavailability of ± Fe, Mn and Al and the phosphorus bioavailability of white pulp after organic fertilizer application. The results showed that the contents of soil humus increased with the increase of the amount of soil humus, and the contents of DTPA and organic Fe, Mn and Al increased. Therefore, biological measures are effective measures to control Albic soil, promote the increase of soil phosphorus nutrient availability and increase buffer capacity and stress resistance of soil.