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首页> 外文期刊>Soil Science Society of America Journal >Phosphorus Adsorption and Fractionation in a Two-phase Olive Mill Waste Amended Soil
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Phosphorus Adsorption and Fractionation in a Two-phase Olive Mill Waste Amended Soil

机译：两相橄榄磨废料改良土壤中磷的吸附和分馏

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Two-phase olive mill waste (TPOMW) is a by-product of olive oil extraction, contains up to 90% organic matter, and may be used as soil amendment. To investigate the impact of TPOMW amendments to soil on the fractionation, adsorption, and buffering capacity of P, experiments were conducted on soils collected from a typical olive grove amended for 5 yr with 0, 30, and 60 Mg ha–1 of TPOMW. A modified Hedley fractionation scheme evaluated the change in soil P forms while surface models were used to fit the data. The P fractionation results suggested and increase in HCl-P fraction. Other P pools, such as residual-P, NaHCO3–Pi, NaOH-Pi, NaOH-Po, soluble-P, and NaHCO3–Po increased to lesser degrees. A two-surface Langmuir model fit the adsorption data better than a uniform layer model and underestimation of the P adsorption was observed when the traditional Langmuir equation was used. The TPOMW amendments significantly decreased the P adsorption maxima ( = 0.05) and most of the P was adsorbed on low energy sites, independent of the amendment applications received. The TPOMW soil application decreased indices of P-binding intensity at both high and low affinity sites, decreased the P equilibrium buffering capacity, and increased the equilibrium P concentration (EPC). Coupled with the low energy of P binding, results implied an increase in the readily soluble P, and thus runoff P losses could potentially increase in TPOMW amended soil.
机译：两相橄榄磨坊废料（TPOMW）是橄榄 榨油的副产品，含有多达90％的有机物，可 用作土壤改良剂。为了研究TPOMW改良剂 对土壤的分离，吸附和缓冲能力 的影响，对从典型的 橄榄林用TPOMW的0、30和60 Mg ha –1 修改了5年。修改后的Hedley分馏方案评估了土壤P形态的 变化，同时使用了表面模型拟合了 数据。 P分馏结果表明，HCl-P馏分中的 增加。其他P库，例如残留P，NaHCO 3 –Pi， NaOH-Pi，NaOH-Po，可溶性P和NaHCO 3 –Po增加到 较小的程度。两面Langmuir模型比均匀层模型更适合吸附 数据，并且在传统Langmuir 方程式下观察到低估了 P吸附被使用了。 TPOMW修正剂显着降低了 的P吸附最大值（= 0.05），并且大多数P被吸附在低能量位点上 ，与修正剂的应用无关>收到。 TPOMW土壤的施用降低了高亲和力点和低亲和力点的P结合强度指数，降低了P平衡缓冲能力，增加了平衡sup > P浓度（EPC）。加上P结合能量低， 结果暗示了易溶P的增加，因此 径流P的损失可能在TPOMW修正的 土壤。

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    《Soil Science Society of America Journal》 |2009年第5期|1539-1544|共6页
  • 作者

    A. López-Pi?eiro; D. Cabrera; D. Pe?a; A. Albarrán; J. M. Rato Nunes;

  • 作者单位

    área de Edafología y Química Agrícola, Facultad de Ciencias, Universidad de Extremadura, Avda de Elvas S/N 06071, Badajoz, Spain,Escola Superior Agraria de Elvas, Apartado 254, 7350, Elvas, Portugal;

    área de Producción Vegetal, Escuela de Ingenierías Agrarias, Universidad de Extremadura, Ctra. de Caceres, 06071, Badajoz, Spain,Escola Superior Agraria de Elvas, Apartado 254, 7350, Elvas, Portugal;

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