Long‐Term Application of Biosolids on Apricot Production
| Autor: | Craig A. Ledbetter, S.E. Benes, Sajeemas Pasakdee, Gary S. Bañuelos |
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| Rok vydání: | 2007 |
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| Zdroj: | Communications in Soil Science and Plant Analysis. 38:1533-1549 |
| ISSN: | 1532-2416 0010-3624 |
| DOI: | 10.1080/00103620701378474 |
| Popis: | The use and disposal of biosolids, or wastewater treatment sludge, as a fertilizer and soil amendment is becoming increasingly widespread. We evaluated the multiyear use of biosolids in apricot (Prunus armeniaca L.) production, grown on productive agricultural soils. Class A biosolids were initially applied annually at rates of 0, 1.9, 5.8, and 11.7 Mg · ha−1 (dry basis) to a 2‐year‐old apricot orchard on the USDA‐ARS research site on the eastern side of the San Joaquin Valley, CA. These application rates provided estimated rates of 0 (control), 57, 170, and 340 kg total N · ha−1 yr−1, respectively. Compared to the control treatment, the applications of biosolids significantly increased soil salinity (electrical conductivity from 1:1 soil–water extract) and total concentrations of nutrients [e.g., calcium (Ca), magnesium (Mg), sulfur (S), phosphorus (P), zinc (Zn), and copper (Cu)] after 7 years but did not increase the concentrations of selected metals [cadmium (Cd), chromium (Cr), cobalt (Co), ... |
| Databáze: | OpenAIRE |
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