| 季节性冻融对扎龙湿地演化的影响 |
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| 引用本文： | 王永洁,罗金明,叶雅杰,王治良,李广文.季节性冻融对扎龙湿地演化的影响[J].水土保持学报,2009,23(5). |
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| 作者姓名： | 王永洁 罗金明 叶雅杰 王治良 李广文 |
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| 作者单位： | 1. 齐齐哈尔大学理学院,黑龙江,齐齐哈尔,161006
2. 齐齐哈尔大学化工学院,黑龙江,齐齐哈尔,161006 |
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| 摘 要： | 通过野外定位观测和室内分析,探讨了冻融季节扎龙湿地的物质迁移和转变规律.结果表明:季节性冻融对扎龙湿地的演化有有明显的影响.扎龙湿地在小尺度内常常表现为盐化沼泽土-碱化草甸土-浅位柱状碱土-白盖苏打碱土-风沙土的微域格局.不同土壤类型的温度特征和冻融过程都存在一定差异.芦苇沼泽的冻融时间长达9个多月,羊草草甸草原的冻融时间仅8个月左右,且芦苇沼泽的冻融深度比羊草草甸草原深24 cm.消融期间芦苇沼泽土的含水率变化不明显,而其它土壤类型的含水率都迅速减少.消融期间部分芦苇沼泽土表层的残积根层逐渐分解,使得表层的有机质增加幅度达55%,0-70 cm土层的总氮增加幅度达52.8%.
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| 关 键 词： | 冻融作用 盐化沼泽土 湿地演替 |
Influence on Zhalong Wetland Succession by Seasonal Frozen-Thawing Action |
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| WANG Yong-jie,LUO Jin-ming,Ye Ya-jie,WANG Zhi-liang,LI Guang-wen.Influence on Zhalong Wetland Succession by Seasonal Frozen-Thawing Action[J].Journal of Soil and Water Conservation,2009,23(5). |
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| Authors: | WANG Yong-jie LUO Jin-ming Ye Ya-jie WANG Zhi-liang LI Guang-wen |
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| Abstract: | By in-situ observation and analysis in laboratory, matters translocation and formation change in Zhalong wetland in frozen and thawing season were discussed. Results show that seasonal frozen and thawing process influenced Zhalong wetland succession obviously. The soil distribution pattern in small micro scale was saline marsh-alkaline meadow soil-shallow columnar sodic alkaline soil-white crust sodic alkaline soil-blown soil. Thermal feature and frozen-thawing process were different in a degree in different soil types. Frozen phase in reed marsh was lasted for more than 9 months, nevertheless, 7 months or so in chloris virga-ta meadow plain, and maxim frozen low limit in the former was 24 cm deeper than the latter. The change of soil water content in reed marsh was no obvious, but decreased abruptly in the others soil types in thawing period. Parts remains roots in surface layer decomposed gradually during thawing period, which leads to increasing by 55 percent of the organic matter, and 52.8 percent of total nitrogen (TN) in 0-70 cm soil layer. |
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| Keywords: | frozen-thawing action saline marsh wetland succession |
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