| 施用柳枝稷茎和叶对土壤有机碳与微生物量碳的影响及其分解特征 |
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| 引用本文： | 李玉进,王百群.施用柳枝稷茎和叶对土壤有机碳与微生物量碳的影响及其分解特征[J].水土保持研究,2012,19(5):78-82. |
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| 作者姓名： | 李玉进 王百群 |
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| 作者单位： | 1. 西北农林科技大学资源环境学院,陕西杨凌,712100
2. 西北农林科技大学资源环境学院,陕西杨凌712100 中国科学院水利部水土保持研究所土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 |
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| 基金项目： | 中国科学院战略性先导科技专项“应对气候变化的碳收支认证及相关问题”(XDA05050504);国家自然科学基金项目(40301024);黄土高原土壤侵蚀与旱地农业国家重点实验室自主课题(10502-T2) |
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| 摘 要： | 采用室内恒温(25℃)培养的方法,研究施用不同用量的柳枝稷茎、叶对土壤有机碳(SOC)和微生物量碳(MBC)的影响,柳枝稷茎、叶在土壤中分解特性。结果表明:柳枝稷茎、叶施入土壤培养90d后,随着柳枝稷茎、叶施入量的增加,SOC和MBC含量明显增加。在柳枝稷茎、叶施用量相同的条件下,施入柳枝稷叶后,土壤微生物量碳的含量高于施用茎的含量,而施用叶的土壤中有机碳的含量低于施入茎的土壤有机碳的含量。柳枝稷茎、叶在土壤中的分解率具有一定的差异,且与施用量有关。在相同的柳枝稷茎、叶施用量条件下,叶在土壤中的分解率高于茎的分解率,表明了茎中的有机碳在土壤中周转期比叶中的长,说明施用柳枝稷的茎可以有效地促进土壤有机碳的累积。
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| 关 键 词： | 柳枝稷 土壤有机碳 土壤微生物量碳 分解率 |
Effect of Amendment of Leaf and Stem of Switchgrass(Panicum virgatum) on Soil Organic Carbon and Microbial Biomass Carbon as well as the Decomposition Characteristic of the Leaf and Stem |
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| LI Yu-jin,WANG Bai-qun.Effect of Amendment of Leaf and Stem of Switchgrass(Panicum virgatum) on Soil Organic Carbon and Microbial Biomass Carbon as well as the Decomposition Characteristic of the Leaf and Stem[J].Research of Soil and Water Conservation,2012,19(5):78-82. |
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| Authors: | LI Yu-jin WANG Bai-qun |
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| Institution: | 1,2(1.College of Natural Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100, China;2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100,China) |
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| Abstract: | An incubation experiment under the constant temperature of 25℃ was conducted to investigate the effect of amendment of leaf and stem of switchgrass(Panicum virgatum) on soil organic carbon(SOC) and microbial biomass carbon(MBC) and the decomposition characteristic of the leaf and stem at various amendment rates of switchgrass leaf and stem.The results showed that the contents of SOC and MBC increased with amendment rates of switchgrass leaf and stem after the incubation of 90 days.Under the same amendment rates of leaf and stem,the pools of soil MBC were larger in the treatments of leaf amendment than that in the treatments of stem amendment,whereas the contents of SOC were higher in the treatments of stem amendments than those in the treatments of leaf amendments.There was a certain discrepancy of decomposition rate between the leaf and stem.The decomposition rates of leaf and stem were determined by the amendment rates.Under the same amendment rates of leaf and stem,the decomposition rates of leaf were higher those of stem,indicating that turnover rate of organic of stem in the soil was longer that of the leaf,and the amendment of stem was conductive to accumulation of organic carbon in soil. |
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| Keywords: | switchgrass soil organic carbon soil microbial biomass carbon decomposition rate |
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