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| Drought resistance of ten woody plants in Liupan Mountain |
| Liu Hailong1,Yu Zhijia2,Xiong Wei3,Wang Yanhui3,Zhou Mei1,Guan Wei4,Shi Zhongjie4,Du Apeng3 |
| 1.Ecology and Environment College,Inner Mongolia Agricultural University,010019,Huhhot;2.Liupan Mountain Forestry Bureau Guyuan City in Ningxia,756401,Jingyuan,Ningxia;3.Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,100091,Beijing;4.Research Institute of Tropical Forestry,Chinese Academy of Forestry,510520,Guangzhou: China |
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Abstract The water parameters of ten woody plants（Quercus liaotungensis,Tilia paucicostata,Betula platyphylla,Betula albo-sinensis,Betula utilis,Larix principis-rupprechtii,Pinus armandii,Populus davidiana,Prunus davidiana,Hippophae rhamnoides） were measured by pressure-volume technique,and the drought resistance of ten woody plants were evaluated from July to August in 2005 in the south （Xiangshuihe Watershed,semi-humid area） and north（Diediegou Watershed,semiarid area） of Liupan Mountain,Ningxia.The results showed that the order of drought-resistant characteristics of the ten woody species were different evaluated by each of all water parameters in the measurement period.A comprehensive evaluation of the drought resistance of the ten plants was conducted by using fuzzy function method,and the result indicated that the ability of drought resistance of 7 woody plants in the Xiangshuihe Watershed was followed as:Tilia paucicostata,Pinus armandii,Quercus liaotungensis,Larix principis-rupprechtii,Betula platyphylla,Betula albo-sinensis,Betula utilis;the order of drought resistance of 4 woody plants in the Diediegou Watershed was followed as: Larix principis-rupprechtii,Prunus davidiana,Hippophae rhamnoides,Populus davidiana.and the result of which was similar to that of the method by using the ratio of bound water to free water as an evaluate index.It meant that the ability of water storage in plant body played a very important role in evaluating the drought resistance of tree species.There was a significant difference in drought resistance of Larix principis-rupprechtii between two different regions,the ability of drought-resistant of this tree species was stronger in Diediegou Watershed than that in Xiangshuihe Watershed.It showed that the ability of drought resistance of the same tree species could be improved as a result of long-term adoptation to drought.
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Received: 19 November 2007
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