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赵晶晶, 杜其霖, 国润才, 刘志强, 程宇琪, 王雨晴, 杜浩, 张成福. 模拟酸雨对大兴安岭3 个树种凋落叶分解速率和溶解有机碳的影响[J]. 浙江林业科技, 2017, 37(5): 10-15. DOI: 10.3969/j.issn.1001-3776.2017.05.002
引用本文: 赵晶晶, 杜其霖, 国润才, 刘志强, 程宇琪, 王雨晴, 杜浩, 张成福. 模拟酸雨对大兴安岭3 个树种凋落叶分解速率和溶解有机碳的影响[J]. 浙江林业科技, 2017, 37(5): 10-15. DOI: 10.3969/j.issn.1001-3776.2017.05.002
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ZHAO Jing-jing, DU Qi-lin, GUO Run-cai, LIU Zhi-qiang, CHENH Yu-qi, WANG Yu-qing, DU Hao, ZHANG Cheng-fu. Effect of Simulated Acid Rain on Decomposition Rate and Dissolved Organic Carbonof Leaf Litter of Three Tree Species in Genhe[J]. Journal of Zhejiang Forestry Science and Technology, 2017, 37(5): 10-15. DOI: 10.3969/j.issn.1001-3776.2017.05.002
Citation: ZHAO Jing-jing, DU Qi-lin, GUO Run-cai, LIU Zhi-qiang, CHENH Yu-qi, WANG Yu-qing, DU Hao, ZHANG Cheng-fu. Effect of Simulated Acid Rain on Decomposition Rate and Dissolved Organic Carbonof Leaf Litter of Three Tree Species in Genhe[J]. Journal of Zhejiang Forestry Science and Technology, 2017, 37(5): 10-15. DOI: 10.3969/j.issn.1001-3776.2017.05.002
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模拟酸雨对大兴安岭3 个树种凋落叶分解速率和溶解有机碳的影响

Effect of Simulated Acid Rain on Decomposition Rate and Dissolved Organic Carbonof Leaf Litter of Three Tree Species in Genhe

    摘要
  • 摘要: 利用室内分解袋法研究模拟酸雨对大兴安岭根河地区白桦Betula platyphylla，杜香Ledum palustre，兴安杜鹃Rhododendron dauricum 凋落叶分解速率及分解释放溶解有机碳的影响，分别设置pH3.5，5.0 和7.0 三个梯度。结果表明，分解过程中3 个树种凋落叶在pH 3.5 的质量损失最少，其次是pH 5.0 和7.0；不同树种对酸雨胁迫的影响具有一定的差异；3 个树种凋落叶的失重率为：杜香＞白桦＞兴安杜鹃；3 个树种凋落叶的失重率和分解速率均与凋落叶初始C 浓度、木质素浓度、C/N 比和木质素/N 呈显著负相关，与N，P 和纤维素浓度呈显著正相关；3 个树种凋落叶分解释放溶解有机碳都是先增加后减少，后趋于动态平衡减少状态。

     

    Abstract: Experiments were conducted by ltter bag technique on effect of simulated acid rain on decomposition rate and content of dissolvedorganic carbon（DOC）from leaf letter of Betula platyphylla, Ledum palustre and Rhododendron dauricum treated with pH 3.5, 5.0 and 7.0 in Genhe,Inner Mongolia Autonomous Region. The results showed that leaf litter mass of 3 species reduced the less under treatment of pH 3.5, and then underpH 5.0 and pH 7.0.The mass loss rate of three species litter leaf was ordered by L.palustre＞B.platyphylla＞R.dauricum. The experiment resulted thatleaf litter decomposition rate and mass loss rate had a significant negative correlation with the content of C, lignin, C/N, lignin/N, but had remarkablepositive correlation with the content of N, P and cellulose. Decomposition and release of DOC from different litters had the same tendency, increasedfirst and then decreased, and then decreased slowly.

     

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