| 氧化铝对红壤正、负电荷的影响 |
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| 引用本文： | 赵安珍,张效年. 氧化铝对红壤正、负电荷的影响[J]. 土壤学报, 1992, 29(4): 382-391 |
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| 作者姓名： | 赵安珍 张效年 |
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| 作者单位： | 中国科学院南京土壤研究所, 210008;中国科学院南京土壤研究所, 210008 |
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| 摘 要： | 用人工合成氧化铝包被土壤的方法研究了氧化铝(三水铝石)对红壤地区五种土壤的电荷性质的影响.结果发现,土壤包被氧化铝后正电荷有不同程度的增加,但其增加量随pH的升高而减少,pH7左右时几乎为零.人工氧化铝对负电荷的影响因土而异.带负电荷少的砖红壤包铝后在pH<7范围内负电荷稍有减少;带负电荷多的黄壤和红壤包铝后在低pH时负电荷明显减少,而高pH时负电荷明显增大;另外两个赤红壤包铝后负电荷也有类似的变化趋势,但变幅较小.四种土壤的负电荷由减小转变到增大时转变点的pH值各土不同,在pH3.6-6.2之间.包铝后土壤净电荷的变化趋势与该土壤的负电荷相似.包铝后土壤的ZPNC都有所升高,升高的幅度因土而异,在0.4-1pH单位之间.
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| 关 键 词： | 氧化铝 正电荷 负电荷 红壤 |
EFFECT OF ALUMINUM OXIDES ON POSITIVE AND NEGATIVE CHARGES IN RED SOILS |
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| Zhao Anzhen and Zhang Xiaonian. EFFECT OF ALUMINUM OXIDES ON POSITIVE AND NEGATIVE CHARGES IN RED SOILS[J]. Acta Pedologica Sinica, 1992, 29(4): 382-391 |
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| Authors: | Zhao Anzhen and Zhang Xiaonian |
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| Affiliation: | Institute of Soil Science, Academia Sinica, Nanjing 210008;Institute of Soil Science, Academia Sinica, Nanjing 210008 |
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| Abstract: | Effects synthetic aluminum oeides (gibbsite) on positive,negative charges,and zero point of net charges (ZPNC) in five soils from southern China were studied by way of coating.After roaring with aluminum oxides,positive charges of these soils increased to varying degrees.But the increments reduced with the increase of pH value.When pH value was about 7,positive charges of four soils approched to zero,but there were still a few positive charges in the latosol. |
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| Keywords: | Aluminum oxides Positive charge Negative charge Zero point of net change Red soil |
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