Lichen Sulfur Contents as Bioindicators of Crop Sulfur: Deficiency or Luxury Uptake
| Autor: | Nguyen V. Hue, C. W. Smith, Russell Yost, R. M. Caldwell, R. L. Fox |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Communications in Soil Science and Plant Analysis. 37:13-24 |
| ISSN: | 1532-2416 0010-3624 |
| DOI: | 10.1080/00103620500403119 |
| Popis: | The most important, immediate source of sulfur (S) for agricultural crops is the soil, but the soil supply is augmented by anthropogenic and natural S additions. In either case, lichen S contents provide a means for evaluating the effective S supply. Thus, lichen S content may be a way of determining locations where S emissions are large and extensive and why soil levels may vary from sufficient to deficient. Lichen S and phosphorus (P) contents were determined in two contrasting areas of the North Central United States, one east and one west of the Mississippi River. Mean contents were in µg g−1 S 4100 and P 1550 in Area East and S 2100 and P, 1660 in Area West. Population density and S emissions are much greater in Area East. Sulfur deficiencies are not generally recognized there. Area West includes regions that range from severely S deficient to adequate in soil S, with regions that are borderline predominating. Lichen S in the Gulf Coast Plain area and northwest of the Great Lakes was in the ... |
| Databáze: | OpenAIRE |
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