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Organic solid wastes from urban environment as iron sources for sorghum |
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| Authors: | Ali A Parsa Arthur Wallace |
| Institution: | (1) Department of Soil and Environmental Sciences, University of California, Riverside, California, USA;(2) Present address: Department of Soil Science, College of Agriculture Pahlavi University, Shiraz, Iran;(3) Laboratory of Nuclear Medicine and Radiation Biology, University of California, Los Angeles, California, USA |
| Abstract: | Sorghum (Sorghum bicolor L. Moench) which is susceptible to Fe deficiency was grown in two different soils in a glasshouse with two different organic urban wastes (sewage sludge and dog manure) to ascertain their ability to supply Fe and other micronutrients to plants. One soil was calcareous with a history of Fe deficiency. Sewage sludge and dog manure at an application rate of 15,000  g/g to this soil effectively supplied Fe to plants. This effect was not present when the ash rather than the organic matter was used. Ferrous sulfate and Fe-EDDHA (Feethylenediamine di-0-hydroxyphenylacetate]) likewise were not effective. Infrared spectra revealed differences in the fulvic acid for the two sources of solid wastes. The results imply that some sources of organic wastes may be useful in prevention or correction of Fe deficiency in calcareous soils. |
| Keywords: | Animal manure Calcareous soil Iron deficiency Sewage sludge Sorghum |
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