| 水曲柳人工林与天然林间土壤磷吸附解吸特性差异 |
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| 引用本文： | 李海瑜,杨振景,王树力.水曲柳人工林与天然林间土壤磷吸附解吸特性差异[J].东北林业大学学报,2021,49(3):93-98. |
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| 作者姓名： | 李海瑜 杨振景 王树力 |
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| 作者单位： | 东北林业大学,哈尔滨,150040;东北林业大学,哈尔滨,150040;东北林业大学,哈尔滨,150040 |
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| 基金项目： | 林业和草原科技成果国家级推广项目;国家重点研发计划项目;黑龙江省省级财政林业科研专项 |
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| 摘 要： | 以东北林业大学森林培育实验站水曲柳天然林采伐后营造33 a的长白落叶松-水曲柳混交林、红皮云杉-水曲柳混交林、红松-水曲柳混交林和水曲柳纯林为研究对象,以原有天然林为对照,测定林下土壤的磷吸附和解吸量,绘制等温吸附解吸曲线,并利用Langmuir吸附方程进行拟合,分析比较水曲柳人工林与天然林间土壤磷最大吸附量(Qm)、吸附强度(K)、最大缓冲容量(MB,C)、零点吸持平衡质量浓度(EP,C0),吸附饱和度(DP,S)、平均解吸率(Dr)、易解吸磷(RD,P)及解吸滞后系数(HI)的异同。结果表明:Langmuir吸附方程能够很好的拟合土壤磷吸附值(R2=0.81~0.98)。与天然林相比,水曲柳人工林土壤磷最大吸附量增加71.7%~285.8%,最大缓冲容量增加76.8%~183.4%,土壤零点吸持平衡质量浓度降低57.0%~90.1%,土壤吸附饱和度降低60.2%~90.1%。水曲柳人工林土壤平均解吸率下降10.9%~40.9%,土壤易解吸磷下降22.1%~75.2%,土壤滞后系数增加32.5%~50.8%。天然林采伐培育水曲柳人工林后增加了土壤对磷的吸附能力,降低了土壤对磷的解吸能力,培育的4种水曲柳人工林中,水曲柳纯林能够更快的恢复土壤供磷能力,对红皮云杉-水曲柳混交林和红松-水曲柳混交林应及时合理施用磷肥,恢复其土壤的供磷能力。
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| 关 键 词： | 水曲柳人工林 水曲柳天然林 土壤磷 吸附 解吸 |
Comparison of Soil Phosphorus Adsorption and Desorption Characteristics in Planted and Natural Fraxinus mand- shurica Forests |
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| Li Haiyu,Yang Zhenjing,Wang Shuli.Comparison of Soil Phosphorus Adsorption and Desorption Characteristics in Planted and Natural Fraxinus mand- shurica Forests[J].Journal of Northeast Forestry University,2021,49(3):93-98. |
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| Authors: | Li Haiyu Yang Zhenjing Wang Shuli |
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| Institution: | (Northeast Forestry University,Harbin 150040,P.R.China) |
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| Abstract: | Taking Larix olgensis-Fraxinus mandshurica mixed plantation,Picea koraiensis-F.mandshurica mixed plantation,Pinus koraiensis-Fraxinus mandshurica mixed plantation and pure F.mandshurica plantation,which were planted on the natural forest clear cutting land in the Forest Cultivation Experiment Station of Northeast Forestry University as materials,contrast to the natural F.mandshurica forest,the amounts of adsorpted and desorpted soil phosphrous contents under forest was measured,and the isothermal adsorption and desorption curve was drawn.In addition,Langmuir adsorption equation was used to fit the P curve,and then,the similarities and differences of the maximum adsorption capacity(Qm),adsorption constant(K),maximum buffering capacity(MB,C),zero adsorption equilibrium concentration(EP,C0),adsorption saturation(DP,S),average desorption rate(Dr),readily desorbed P(RD,P)and desorption hysteresis coefficient(HI)of soil P between F.mandshurica plantations and natural forest were analyzed and compared.There was a good fitness between the P adsorption content value and Langmuir equation(R 2=0.81-0.98,p<0.01).By contrast with the natural F.mandshurica forest the Q m of F.mandshurica plantation increased by 71.7%to 285.8%,the MB,C increased by 76.8%to 183.4%,the EP,C0 decreased by 57.0%to 90.1%,and the D_( P,S) decreased by 60.2%to 90.1%.The Dr of F.mandshurica plantation decreased by 10.9%-40.9%,the RD,P decreased by 22.1%to 75.2%,and the HI increased by 32.5%to 50.8%compared with natural forest.The P desorption capacity was increased and the desorption capacity was reduced after F.mandshurica plantations cultivating on the natural forest clear cutting land.Among the four types of F.mandshurica plantations,pure F.mandshurica plantation can restore the ability of soil P supply more quickly.Phosphate fertilizer should be applied reasonably to Picea koraiensis-F.mandshurica mixed plantation and Pinus koraiensis-F.mandshurica mixed plantation to restore their soil P supply capacity. |
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| Keywords: | Fraxinus mandshurica planations Fraxinus mandshurica natrual forest Soil phosphurate Adsorption Desorption |
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