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| Succession disciplinarian of vegetation in abandoned land in agricultural cross bedding on south edge of Otindag sandy land |
| Zheng Cuiling, Cao Zilong, Zhao Tingning, Sun Baoping, Ding Guodong |
| College of Soil and Water Conservation, Bejing Forestry University, 100083, Beijing, China |
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Abstract The characteristics of plant communities on abandoned land in different years were surveyed in agricultural cross bedding in the south edge of Otindag sandy land. The results showed that there were four stages in the whole succession of abandoned land, including annual weeds stage, overgrowth grass stage, perennial root grass stage and perennial overgrowth grass stage; changes of total over ground biomass and the abandoned time was not a linear dependence relation, and with increasing of time, the proportion of perennial grass over ground biomass in the total over ground biomass increased too. By comparing the characteristics of plant communities in different pasture disturbances, another result was gained that abandoned land shouldn't be made use in the first two stages, but appropriate use was allowed in the last two succession stages. Along with increasing years of abandoned plant, as long as surface soil is not destroyed, the land would have a progressive succession and reach the partial climax community, and then would cause regressive succession under pasture disturbance.
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Received: 19 April 2004
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