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采用室内土柱模拟试验方法,通过三种不同来源风化煤处理对土壤呼吸量、pH值、土壤有效铁含量的影响,揭示不同来源风化煤活性的差异及对土壤中铁的活化效果差异。试验结果表明在北方石灰性土壤中施用风化煤,可以显著提高土壤中的有效铁含量及土壤呼吸量,降低土壤pH值。与对照相比,土壤有效铁含量提高幅度为1.17～3.13倍,土壤pH降低幅度为0.3～0.48个pH单位,土壤呼吸量增加2.42％～15.40％,且不同风化煤处理之间达到了差异显著或极显著水平。
The effects of weathering coal from three different sources on soil respiration, pH value and soil available iron content were studied by indoor soil column simulation test to reveal the differences in the activity of weathered coal from different sources and the activation effect on iron in soil. The test results show that applying weathered coal to calcareous soil in northern China can significantly increase the available iron content and soil respiration in the soil and decrease the soil pH. Compared with the control, soil available Fe increased by 1.17 ~ 3.13 times, soil pH decreased by 0.3 ~ 0.48 pH units, soil respiration increased by 2.42% ~ 15.40%, and there was significant difference between different weathering coal treatments Or very significant level.