| 不同淋洗对于碱土的影响 |
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| 引用本文： | S.P.米特拉,H.谢克尔.不同淋洗对于碱土的影响[J].土壤学报,1957,5(4):317-321. |
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| 作者姓名： | S.P.米特拉 H.谢克尔 |
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| 作者单位： | 阿拉哈巴德大学西尔那得哈尔土壤研究所;阿拉哈巴德; |
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| 摘 要： | 当用水淋洗碱土时,其水浸提液中的钙量恆少于普通土壤中者。水土比例增大时,淋洗出的钙量增多,惟增加量不很大。水土比例增大时,普通土壤各次滤液的pH 值并不增大,且易于达到蒸馏水的pH 值,反之,碱土的pH 值很慢的降低至pH 7.5。浸提液中CO_3~=量逐渐减少,和pH 值的降低相一致,重碳酸盐量开始时逐渐增多,以后又降低。反覆用水淋洗时pH 值亦逐渐降低。
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| 关 键 词： | 碳酸钙 加量 碱土 水土比 水浸提液 土壤研究 淋洗 用水 溶解度 |
STUDIES ON THE EFFECT OF DIFFERENT WASHINGS ON ALKALI SOILS |
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| S. P. MITRA and HARI SHANKER.STUDIES ON THE EFFECT OF DIFFERENT WASHINGS ON ALKALI SOILS[J].Acta Pedologica Sinica,1957,5(4):317-321. |
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| Authors: | S P MITRA and HARI SHANKER |
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| Institution: | Sheila Dhar Institute of Soil Science;University of Allahabad;Allahabad;India |
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| Abstract: | When alkali soil is leached with water, the amount of calcium in water extracts is always less than in the case of normal soil. With increased dilution there is a definite increase in the amount of calcium given out, yet the quantity is not very great. When water is added in increasing amounts to the normal soil, there is no increase in pH values of the successive filtrates and the pH of the distilled water is easily obtained, whilst the pH value of the alkali soils falls very gradually to a pH of 7.6. The amount -CO3 ions in the extracts gradually decreases with concomitant decrease in pH values. The amount of bicarbonates at first increases gradually and then falls. A gradual decrease in pH values also takes place with repeated washings with distilled water. |
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