Response of Exotic Invasive Weed Alternanthera philoxeroides to Environmental Factors and Its Competition with Rice
A greenhouse experiment was conducted to determine the influence of the environmental factors such as low-temperature, drought stress, salt-alkali and flooding on the survival rate, propagation rate, fresh biomass and viability of the Altemanthera philoxeroides and its competitive ability against ri...
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Published in | Rice science Vol. 14; no. 1; pp. 49 - 55 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.03.2007
State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China%National Institute for Agro-Environmental Science, Tsukuba, Ibaraki, 305-8604 Japan |
Subjects | |
Online Access | Get full text |
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Summary: | A greenhouse experiment was conducted to determine the influence of the environmental factors such as low-temperature, drought stress, salt-alkali and flooding on the survival rate, propagation rate, fresh biomass and viability of the Altemanthera philoxeroides and its competitive ability against rice by using bioassay method. A high viability of 84% was found when the stems were treated at 4℃ and then grew under normal conditions, while no viable plant was noted when the stems were treated at -20℃ and grew under normal conditions. Compared to the fresh stem with water content of 93.5%, the survival rate, number of propagated stems and fresh biomass of A. philoxeroides derived from the stems with water content of 30.2% were reduced by 45%, 33% and 74% respectively. The treatments of 0.1% salt-alkaline solution led to loss of viability of A, philoxeroides. The stems of A. philoxeroides could grow in wet soil with different depths of water-layer. The A. philoxeroides at density of 23-180 plants/m^2 reduced the rice grain yield by 43-50% at the rice plant density of 100 plants/m^2. |
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Bibliography: | 33-1317/S Altemanthera philoxeroides; hydrophytic type; environmental factor; rice; viability; competitive ability environmental factor Altemanthera philoxeroides hydrophytic type S451 rice competitive ability viability |
ISSN: | 1672-6308 1876-4762 |
DOI: | 10.1016/S1672-6308(07)60008-0 |