| 银川平原湖泊湿地不同水深梯度下芦苇种群生长特征 |
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| 引用本文： | 乔斌,何彤慧,于骥,吴春燕,苏芝屯.银川平原湖泊湿地不同水深梯度下芦苇种群生长特征[J].干旱区研究,2017,34(4). |
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| 作者姓名： | 乔斌 何彤慧 于骥 吴春燕 苏芝屯 |
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| 作者单位： | 宁夏大学西北退化生态系统恢复与重建教育部重点实验室/西北土地退化与生态恢复国家重点实验室培育基地,宁夏银川,750021 |
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| 摘 要： | 银川平原湖泊湿地芦苇种群发挥着重要的生态功能。以银川平原湖泊湿地芦苇(Phragmites australis)为研究对象,设置了4个水深梯度,即Ⅰ(0~5 cm)、Ⅱ(5~25 cm)、Ⅲ(25~50 cm)、Ⅳ(50 cmⅣ150 cm),通过野外调查采样、实验室分析,探讨芦苇种群生物量、株高的动态变化规律及其对不同水深环境的响应,分析不同水深梯度株高与生物量的协同适应能力。结果表明:水深对生物量、株高的影响极显著(P0.01),生物量随着水深的增加呈现波动增加趋势,株高对水深增加的响应为非线性正相关;不同水深梯度对生物量、株高的累积速率表现出不同的极显著差异(P0.01)。各水深梯度生物量累积在时间序列上为单峰形曲线,株高变化规律为先单调上升后维持不变。水越深生长速率越快,生物量和株高的累积效应越明显;芦苇种群对水深梯度变化的生态适应能力并非线性,水深过高(50 cmⅣ150 cm)或过低(0~5 cm)对芦苇生长都有一定的抑制作用,适宜水深(5~50cm)株高与生物量的耦合程度高,芦苇长势良好。该研究为确定芦苇生长最佳水深阈值区间和有序推进银川平原湖泊湿地生态恢复工程提供了科学依据。
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| 关 键 词： | 芦苇种群 水深梯度 生物量 株高 银川平原 |
Growth of Phragmites australis Population under Different Water-depth Gradients in Lake-wetland of the Yinchuan Plain |
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| QIAO Bin,HE Tong-hui,YU Ji,WU Chun-yan,SU Zhi-tun.Growth of Phragmites australis Population under Different Water-depth Gradients in Lake-wetland of the Yinchuan Plain[J].Arid Zone Research,2017,34(4). |
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| Authors: | QIAO Bin HE Tong-hui YU Ji WU Chun-yan SU Zhi-tun |
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| Abstract: | Phragmites australis population in lake-wetland plays an important ecological function in the Yinchuan Plain.In this study,P.australis in lake-wetland in the Yinchuan Plain was selected to explore the dynamic variation regularity of its aboveground biomass,plant height and response to different water depths,and research the correlation between height and biomass of P.australis by field sampling and laboratory analysis.The main conclusions are as follows:The effect of water-depth gradient on biomass and plant height of P.australis was extremely significant (P ＜0.01).Biomass was increased with the increase of water depth in a fluctuation way,and there was a positive nonlinear correlation between plant height and water depth.The effect of water depth on biomass and plant height was quite different (P ＜ 0.01).The curve of biomass accumulation was unimodal,and the plant height was monotonically increased at first and then maintained.The deeper the water depth was,the higher the plant height would be.Growth of P.australis was restricted if water was too deep (50 cm ＜ IV ＜ 150 cm) or too shallow (0-5 cm).Under appropriate water depth (5-50 cm),P.australis could grow well.These findings provide the valuable information for implementing the lake-wetland restoration project in the Yinchuan Plain. |
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| Keywords: | Phragmites australis population water-depth gradient biomass plant Height Yinchuan Plain |
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