不同土壤类型对芦苇生长及光合特征的影响
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国家自然科学基金(41361095);宁夏财政补助2012年林业科技专项


Influence of Different Soil Types on Reed Growth and Photosynthesis Characteristics
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    摘要:

    以宁夏平原湿地恢复中常用的几种土壤进行芦苇栽培控制实验,获取芦苇在不同土壤环境中生长及光合作用特征,探讨影响芦苇正常生长发育的主要土壤因子和适宜土壤类型。结果表明:(1)不同土壤环境条件下芦苇的多度、株高、叶面积、株径、生物量存在显著差异,且各生态和生长特征值均为草炭土最大。(2)芦苇的光合参数PnGsTr表现出相同的变化趋势,即峰值出现在10:00,具有明显的“午休”现象,但Ci值的变化趋势则相反。(3)不同土壤类型上芦苇的光合效应表现为草炭土>沼泽土>原位土>灰钙土>沙土,显示草炭土中芦苇的光合效应最强。(4)土壤因子与芦苇的生物量、净光合速率的通径分析及逐步回归分析结果表明,土壤有机碳含量(SOC)、全氮含量(TN)是影响芦苇生物量的决定因子;影响芦苇净光合速率的决定因子为土壤全氮含量(TN)、有机碳含量(SOC)和土壤全磷含量(TP),土壤全盐含量(TS)为限制因子。(5)芦苇属于典型的水生植物,对水分的要求较高,草炭土富含养分,且保水能力特别强,是最适合芦苇生长的土壤类型。

    Abstract:

    By selecting several control experiments of cultivation of reed from several different commonly used soils in restoring Ningxia Plain wetland,we obtained the performance characteristics of reed growth and photosynthesis to different soil environments.The results showed that:(1)Under different soil conditions,there were significant differences in plant height,leaf area,plant diameter,biomass,and the value of each ecological characteristics of peat soil organisms are the largest.(2)Reed photosynthetic parameters Pn,Gs,Tr showed the same trend,namely peak at 10:00,with the obvious ‘lunch break’ phenomenon,the changes of Ci value is the opposite.The effect on the photosynthetic performance of different types of soil reed is peat soil>swamp soil>situ soil>sierozem>sand,and it displays the strongest effects on photosynthesis reed peat soil.(4)By the path analysis and stepwise regression analysis of the reed biomass and soil factors and net photosynthetic rate Pn,the results showed that:soil SOC and soil TN determined reed biomass,and is the most important factor.The determined factor to affect reed net photosynthetic rate is soil TN,soil SOC and soil TP,while TS is the limiting factor.(5)Reed is a typical aquatic plant,higher water requirement,peat soil is nutrient and its water conservation is particularly high,and therefore,peat soil is the most suitable soil type for reed growth.

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夏贵菊,何彤慧,赵永全,等.不同土壤类型对芦苇生长及光合特征的影响[J].西北植物学报,2014,34(6):1252-1258

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  • 在线发布日期: 2014-07-01
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