Authors: Faezeh Eslamian, Zhiming Qi, Mike Tate, Shiv Prasher
Identifier: CSBE19151
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Published in: CSBE-SCGAB Technical Conferences » AGM Vancouver 2019

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Description: Soil phosphorus leaching from agricultural fields has contributed to the eutrophication of lakes over the past years. Soil amendments can be used to help reduce phosphorus leaching fixing phosphorus in the soil. The objective of this study was to evaluate the effect of lime amendment on phosphorus leaching and soybean growth in sandy lysimeters and to compare fall versus spring lime application. For this purpose, 15 sandy soil lysimeters (100 cm height and 50 diameter), installed on the Macdonald campus farm of McGill university, were selected. One percent by soil weight of high calcium hydrated lime was applied to the top 5 cm of nine lysimeters. Soybeans were planted in six lysimeters. From late May to October after each substantial rainfall, water samples were extracted and analyzed for soluble reactive phosphorus, total dissolved phosphorus, calcium, magnesium and potassium. The results showed that the average soluble reactive phosphorus concentration in the limed lysimeters was significantly lower compared to the non-limed lysimeters (0.043 and 0.078 mg/L, respectively). However, there was no significant change regarding the total dissolved phosphorus. Lime application in fall showed a better performance in reducing phosphorus loss by 30% as compared to that of spring lime application. Furthermore, there was no significant difference in the soybean yield. It can be concluded that lime application at the studied application dose could be a promising soil amendment in reducing phosphorus loss in sandy lysimeters without disturbing the soybean growth regardless of the pH-lime requirements.

Keywords: Phosphorus, Lime, Leaching, Soybean
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Date: 2019-07-15
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Conference name: CSBE/SCGAB 2019 Annual Conference, Vancouver, BC, 14-17 July 2019.
Session name: Soil and water

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Type: Presentation
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Publication type: Text.Abstract
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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