Response of Bean and Broccoli to High-sulfate Irrigation Water
| Autor: | Dan Drost, Jennifer W. MacAdam, N. Soltani, Lynn M. Dudley |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | HortTechnology. 7:429-434 |
| ISSN: | 1943-7714 1063-0198 |
| DOI: | 10.21273/horttech.7.4.429 |
| Popis: | Groundwater contaminated with sulfate (SO42−) at concentrations greater than allowed for drinking water may be suitable for irrigation. Our objectives were to determine the growth response and mineral uptake of two vegetables grown with high SO42− irrigation water. Bean (Phaseolus vulgaris) and broccoli (Brassica oleracea L.) were grown in a calcareous sandy loam soil irrigated with water containing 175 to 1743 mg SO42−/L. Plants were harvested and growth was measured at 4, 8, or 12 weeks. Soil paste and dried ground plant tissue extracts were analyzed for elemental composition at each harvest by inductively coupled plasma spectroscopy. Bean shoot dry mass decreased as SO42− concentration increased. Although pod number at 4 weeks decreased as SO42− concentration increased, pod number at 12 weeks was not affected by irrigation treatments. Broccoli growth was not affected by increasing SO42− concentration at any of the harvest dates, although head diameter decreased as SO42− increased. Magnesium, sodium, and sulfur accumulated in shoot tissue (leaves and stems) of both species in proportion to their concentration in the irrigation water. Soil Na and electrical conductivity levels increased as SO42− concentration increased even with a 20% leaching fraction. These results suggest that bean and broccoli can be successfully grown with high-SO42− irrigation water. |
| Databáze: | OpenAIRE |
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