| 张军红，侯新.不同固定程度沙地油蒿比叶面积和叶N 含量的比较[J].广东农业科学,2013,40(23):39-42 |
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不同固定程度沙地油蒿比叶面积和叶N 含量的比较 |
| Comparison of specific leaf area and N content in leaf of Artemisia ordosica under different stage of sand dunes |
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| DOI： |
| 中文关键词: 油蒿 比叶面积 叶N含量 土壤水分 土壤理化性质 |
| 英文关键词: Artemisia ordosica specific leaf area N content in leaf soil moisture soil physicochemical property |
| 基金项目:国家自然科学基金(31200536)；国家林业局“948”项目(2013-4-80) |
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| 摘要点击次数: 1432 |
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| 中文摘要: |
| 研究了生长在不同固定程度沙地(固定、半固定和流动)上的油蒿比叶面积和叶N含量的变化，并分析了不同固定程度沙地的土壤水分、养分和机械组成。结果表明：随着沙地固定程度的增加，油蒿叶N含量显著增加，固定和半固定沙地油蒿比叶面积无显著差异，两者均显著低于流动沙地；随着沙地固定程度的增加，土壤水分状况逐渐恶化，土壤有机质和总N含量呈现递增的趋势，土壤中粉粒含量逐渐递增而细沙粒和粗沙粒含量减少遥随沙地固定程度的增加，油蒿叶N含量增加，可以使土壤水分条件较差的地方生长的油蒿获得与土壤水分丰富区植株相当的水分利用效率，即生长在同一地区的油蒿因环境异质性存在明显的策略位移现象。 |
| 英文摘要: |
| The differences of specific leaf area and N content in leaf of Artemisia ordosica under different stage of sand dunes were analyzed. Soil moisture, soil nutrient content, and mechanical composition under different stage of sand dunes were also analyzed at the same time. The results showed that leaf N of A. ordosica increased with the degree of sand fixation, however, no significant difference existed between fixed and semi-fixed sand dunes, which were significantly lower than in the shifting dunes; soil moisture got worse with the increase of sand fixation, while organic matter, total N, and fine sand in soil increased with the fixation stage increasing. The increasing leaf N content of A. ordosica with the fixation degree could make the plants in poor soil moisture get considerable efficiency of water using, as well as these with rich soil moisture, which meant A. ordosica in the same area could have different survival strategies because of environmental
heterogeneity. |
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