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通过土培试验研究电厂灰的不同用量及电厂灰分别与石灰和磷灰石的不同配比对江西酸性红壤的改良作用。结果表明,随着电厂灰用量增加,土壤p H值升高,土壤交换性Al3+和交换性H+含量降低;土壤中有效养分含量增加,尤其是速效钾和交换性K+增加显著,最大增幅可达26.9%和66.7%,电厂灰最佳用量4500 kg hm-2。生物质电厂灰/磷灰石的配比中,综合效果以3/1为最佳,平均提高土壤p H值0.12个单位,降低土壤交换性Al3+和交换性H+的含量分别为0.68和0.10cmol(+)kg-1,对土壤中盐基离子(K+、Ca2+、Na+、Mg2+)和速效养分含量都有显著提高,其中土壤交换性Ca2+和交换性Mg2+增加最显著,增幅达58.1%和34.6%。而电厂灰/石灰的配比以1/1为最优,平均提高土壤0.2个p H单位,降低土壤交换性Al3+和交换性H+的含量分别为1.19和0.20 cmol(+)kg-1,养分方面以提高土壤速效磷含量最为突出,增幅为5.6%。因此,生物质电厂灰与石灰和磷灰石按照一定的比例组合才能达到理想的土壤改良效果。
Soil culture experiment was conducted to study the effects of different dosage of power plant ash and different proportions of power plant ash and lime and apatite on acid red soil in Jiangxi Province. The results showed that with the increase of plant ash content, soil p H value increased, soil exchangeable Al3 + and exchangeable H + content decreased; soil available nutrients increased, especially available potassium and exchangeable K + increased significantly, the maximum increase up to 26.9% and 66.7% respectively, and the optimum amount of power plant ash is 4500 kg hm-2. Biomass power plant ash / apatite ratio, the combined effect of 3/1 best, an average increase of soil p H value of 0.12 units, reduce soil exchangeability Al3 + and exchangeable H + content of 0.68 and 0.10cmol (K +, Ca2 +, Na +, Mg2 +) and available nutrient contents in soils increased significantly (+) kg-1, of which soil exchangeable Ca2 + and exchangeable Mg2 + increased most significantly, by 58.1% and 34.6% %. On the other hand, the ratio of plant ash / lime was 1/1, which increased 0.2 p H of soil on average, and the contents of soil exchangeable Al 3 + and exchangeable H + were 1.19 and 0.20 cmol (+) kg -1 respectively. The nutrients In terms of improving soil available phosphorus content the most prominent, an increase of 5.6%. Therefore, biomass power plant ash and limestone and apatite in accordance with a certain percentage of combination in order to achieve the desired soil improvement.