Effect of soil moisture stress on yield,nodulation and nitrogenase activity ofMacroptilium atropurpureum cv. Siratro andDesmodium intortum cv. Greenleaf |
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| Authors: | B Ahmed P Quilt |
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| Institution: | (1) Department of Soil Science, University of the West Indies, St. Augustine, West Indies;(2) Present address: Caribbean Agricultural Research and Development Institute, University Campus, St. Augustine, Trinidad;(3) Present address: P.O. Box 3449, Lusaka, Zambia |
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| Abstract: | Summary The effect of soil moisture stress on growth, nodulation and nitrogenase activity of two tropical forage legumes,Macroptilium atropurpureum cv. Siratro andDesmodium intortum cv. Greenleaf was studied in a pot experiment. After ten weeks growth, the highest moisture stress (20 per cent water holding capacity) significantly reduced only the top weight of both plants. Moisture stress progressively retarded top growth in the two legumes. Similar trends were also observed in defoliated plants. Moisture stress had little or no effect on the nodulation or nitrogenase activity of the plants. |
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| Keywords: | Moisture stress Nitrogen fixation Tropical forage legume |
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