| 施用碱稳定固体减轻酸性土壤的酸度和铝毒 |
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| 作者姓名： | LUO Yong-Ming P. CHRISTIE |
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| 作者单位： | [1]InstituteofSoilScience,theChineseAcademyofSciences,Nanjing210008（China） [2]DepartmentofAgriculturalandEnvironmentalScience,TheQueen′sUniversityofBelfast,NewforgeLaneBelfast,BT95PX（U |
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| 基金项目： | *1National Natural Science Foundation of China (Nos.49831070 and 40125005), the National Key Basic Research Support Foundation of China (No.G1999011807) and the Jiangsu Provincial Foundation for Young Scientists (No.BQ98050). |
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| 摘 要： | A pot experiment was catried out to study alleviation of soil acidity and Al toxicity by applying analkaline-stabilised sewage sludge product (biosolids) to an acid clay sandy loam (pH 5.7) and a strongly acidsandy loam (pH 4.5). Barley (Hondeum vulgare L. cv. Forrester) was used as a test crop and was grownin the sewage sludge-amended (33.5 t sludge DM ha-1) and unamended soils. The results showed that thealka1ine biosloids increased soil pH from 5.7 to 6.9 for the clay sandy loam and from 4.5 to 6.0 for the sandyloam. The sludge product decreased KCl-extractable Al from 0.1 to 0.0 cmol kg-1 for the former soil and from 4.0 to 0.1 cmol kg-1 for the latter soil. As a result, barley plants grew much better and grain yield increased greatly in the amended treatments compared with the unamended controls. These observations indicate that alkaline-stabilised biosolids can be used as a liming material for remedying Al phytotoxicity instrongly acid soils by increasing soil pH and lowering Al bioavailability.
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| 关 键 词： | 酸性土壤 酸度 铝 碱 土壤改良 |
Alleviation of soil acidity and aluminium phytotoxicityin acid soils by using alkaline-stabilised biosolids |
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| LUO Yong-Ming,P. CHRISTIE.Alleviation of soil acidity and aluminium phytotoxicityin acid soils by using alkaline-stabilised biosolids[J].Pedosphere,2002,12(2):185-188. |
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| Authors: | LUO Yong-Ming and P CHRISTIE |
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| Institution: | Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China);Department of Agricultural and Environmental Science, The Queen's University of Belfast, Newforge LaneBelfast, BT9 5PX (UK) |
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| Abstract: | A pot experiment was catried out to study alleviation of soil acidity and Al toxicity by applying analkaline-stabilised sewage sludge product (biosolids) to an acid clay sandy loam (pH 5.7) and a strongly acidsandy loam (pH 4.5). Barley (Hondeum vulgare L. cv. Forrester) was used as a test crop and was grownin the sewage sludge-amended (33.5 t sludge DM ha-1) and unamended soils. The results showed that thealka1ine biosloids increased soil pH from 5.7 to 6.9 for the clay sandy loam and from 4.5 to 6.0 for the sandyloam. The sludge product decreased KCl-extractable Al from 0.1 to 0.0 cmol kg-1 for the former soil and from 4.0 to 0.1 cmol kg-1 for the latter soil. As a result, barley plants grew much better and grain yieldincreased greatly in the amended treatments compared with the unamended controls. These observationsindicate that alkaline-stabilised biosolids can be used as a liming material for remedying Al phytotoxicity instrongly acid soils by increasing soil pH and lowering Al bioavailability. |
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| Keywords: | alkaline biosolids phytotoxicity soil acidity soil remediation |
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