The dry matter production, nutrient concentration and allelopathic effects of A. donax were studied in Jaipur, Rajasthan, India. A. donax preferred to grow along the marginal upland areas of natural wetlands flooded temporarily during rainy season.
Its woody rhizome formed a close network in the soil at a depth of approximately 25-30 cm, while its thick tough roots penetrated at a depth of >1.0 m into the soil. It was a highly productive species.
Annual cutting after flowering improved plant growth and organic matter production. Studies on nutrient dynamics revealed slight internal cycling. A. donax stand soil markedly inhibited the growth of Typha angustata (an important obnoxious weed) seedlings, whereas its leaf and litter leachates retarded the growth of selected free floating and submerged hydrophytes. The applications of these findings in the management of freshwater ecosystems are discussed.
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