H. A. Ruiz, R. A. Sampaio, Maurício Limberger de Oliveira, P. A. Ferreira
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引用次数: 11
摘要
研究了淋滤对盐碱土样品化学特性的影响。瓶中装满土壤FLUVENT (Ae1)、FLUVENT在0-20 cm (Ae2-s)和20-50 cm (Ae2-i)深度收集的样品以及VERTISOL (V)。石膏加入至15 cm深度，以取代100%的可交换钠。浸出包括只施用一次CaCl2和MgCl2溶液，相同体积的溶液分别分两次、四次和六次，每次施用的间隔为22天。粘土在土壤中的分散性和保水能力随着石膏和淋滤分馏而降低。在Ae1土壤中，入渗速率很低，因此停止测定。在所有土壤中，除V外，由于粉砂含量较大，未处理样品的入渗速率低于处理样品。一般来说，土壤物理特性未检测到淋滤应用之间的显着差异
CARACTERÍSTICAS FÍSICAS DE SOLOS SALINO-SÓDICOS SUBMETIDOS A PARCELAMENTO DA LÂMINA DE LIXIVIAÇÃO
The aim of this work was evaluate the influence of leaching on chemical characteristics of saline sodic soil samples. Cylinders were filled with samples of soils FLUVENT (Ae1), FLUVENT collected at 0-20 cm (Ae2-s) and 20-50 cm (Ae2-i) depth, and VERTISOL (V). Gypsum was incorporated up to 15 cm depth in an amount to replace 100% exchangeable sodium. Leaching consisted in applying a solution with CaCl2 and MgCl2, at one time only and the same volume fractionated in two, four and six times, respectively, with intervals of 22 days among each application. Clay dispersion and water retention capacity in soils diminished with the gypsum and leaching fractionation. In Ae1 soil, the infiltration rate was very low, then stopping its determination. In all soils, with the exception of V, because of the greater content of silt, the infiltration rate of the not-treated samples was lower compared with treated samples. In general, significant differences amongst leaching application were not detected for soil physics characteristics
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