Knowledge Management System of Northwest Institute of Plateau Biology, CAS
Suitability of extractants for predicting available sulfur in natural grassland in the Inner Mongolia steppe of China | |
Cui, XY ; Wang, SP ; Wang, YF ; Xing, XR ; Chen, ZZ ; Haneklaus, S ; Fleckenstein, J ; Schnug, E | |
2006 | |
发表期刊 | COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
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摘要 | It was the objective of this study to compare the suitability of different extractants for predicting the availability of sulfur (S) in natural grassland in a sulfur response trial on three different soil types in the Inner Mongolia steppe of China. For soil analysis, seven different extractants have been employed. The inorganic SO4-S concentration was determined by ion chromatography. Additionally, in the Ca(H-2-PO4)(2) extract the total soluble S was determined employing turbidimetry. Weak salt solutions (0.15% CaCl2, Ca(H2PO4)(2), and KH2PO4) extracted similar amounts Of SO4-S. Extraction with 0.025 M KCl provided the lowest SO4-S values. Deionized water dissolved significantly more SO4-S in the control plots than most weak salt extractants. The concentration of soluble organic S decreased in the control plots after 100 days of plant growth, indicating that the organic S pool contributed significantly to the S nutrition of the forage crops. Significant relationships among the SO4-S in the soil determined in different extracts and crop yield, sulfur content in the forage, and total sulfur uptake were only found for the Ca(H2PO4)(2) extract. In general, the correlation coefficients proved to be unsatisfactory for field experimentation.; It was the objective of this study to compare the suitability of different extractants for predicting the availability of sulfur (S) in natural grassland in a sulfur response trial on three different soil types in the Inner Mongolia steppe of China. For soil analysis, seven different extractants have been employed. The inorganic SO4-S concentration was determined by ion chromatography. Additionally, in the Ca(H-2-PO4)(2) extract the total soluble S was determined employing turbidimetry. Weak salt solutions (0.15% CaCl2, Ca(H2PO4)(2), and KH2PO4) extracted similar amounts Of SO4-S. Extraction with 0.025 M KCl provided the lowest SO4-S values. Deionized water dissolved significantly more SO4-S in the control plots than most weak salt extractants. The concentration of soluble organic S decreased in the control plots after 100 days of plant growth, indicating that the organic S pool contributed significantly to the S nutrition of the forage crops. Significant relationships among the SO4-S in the soil determined in different extracts and crop yield, sulfur content in the forage, and total sulfur uptake were only found for the Ca(H2PO4)(2) extract. In general, the correlation coefficients proved to be unsatisfactory for field experimentation. |
文献类型 | 期刊论文 |
条目标识符 | http://210.75.249.4/handle/363003/35557 |
专题 | 中国科学院西北高原生物研究所 |
推荐引用方式 GB/T 7714 | Cui, XY,Wang, SP,Wang, YF,et al. Suitability of extractants for predicting available sulfur in natural grassland in the Inner Mongolia steppe of China[J]. COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, Cui XY, Wang SP, Wang YF, Xing XR, Chen ZZ, Haneklaus S, Fleckenstein J, Schnug E.Suitability of extractants for predicting available sulfur in natural grassland in the Inner Mongolia steppe of China.COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS,2006,37(5-6):721-732,2006. |
APA | Cui, XY.,Wang, SP.,Wang, YF.,Xing, XR.,Chen, ZZ.,...&Schnug, E.(2006).Suitability of extractants for predicting available sulfur in natural grassland in the Inner Mongolia steppe of China.COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS. |
MLA | Cui, XY,et al."Suitability of extractants for predicting available sulfur in natural grassland in the Inner Mongolia steppe of China".COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS (2006). |
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