Title: Response of Root System of Leymus chinensis Population to Water Gradient in Degraded Grassland
Abstract: Typical steppe is one of the important grassland types in North China,study on the response of root characteristics of Leymus chinensis to water gradients has important scientific significance for revealing root growth and development of steppe plants and theirs ecological stability.A lightly and a heavily degraded grassland communities were selected in Xilinguole typical steppe region of Inner Mongolia.A water gradient experiment was designed to research the response of root system characteristics of Leymus chinensis population to water gradient in degraded grassland in different degree.The results showed that with the decrease of water gradient,the height of Leymus chinensis gradually decreased while main root length and root volume increased gradually in both types of grasslands,the root surface area had an increasing trend,but only significant correlated to water gradient in heavily degraded grassland,root diameter had a decreasing trend,but only significant correlated to water gradient in lightly degraded grassland.Comparing degraded grasslands in different degree,most of root characters of Leymus chinensis had no significant difference under most water gradient,except that,under moist condition(600 mm),the root surface area and root volume in lightly degraded grassland were much higher than those in heavily degraded grassland.Under drought condition(150mm),the main root length in heavily degraded grassland was much higher than those in lightly degraded grassland.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 1
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