| 土地利用方式对田间植物残体中C、N矿化的影响 |
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| 引用本文： | CHENG Li-Li,WEN Qi-Xiao. 土地利用方式对田间植物残体中C、N矿化的影响[J]. 土壤圈, 1998, 8(4): 311-316 |
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| 作者姓名： | CHENG Li-Li WEN Qi-Xiao |
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| 作者单位： | [1]InstituteofSoilScience,theChineseAcademyofSciences,P.O.Box821,Nanjing210008（CHina） [2]InstituteofSoilSci,theChineseAcademyofSciences,P.O.Box821,Nanjing210008（CHina） |
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| 基金项目： | *1Project (No.397910004) supported by the National Natural Science Foundation of China. |
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| 摘 要： | Four kinds of plant materials(astragalus,azolla,rice straw and water hyacinth) were allowed to decom-pose for 10 years in two soils with different mineralogical characteristics in fields under upland and submerged conditions.Greater amounts of C and N from azolla were retained in soils throughout the 10-year experi-mental period compared to those from the other plant materials.The residual C of all the plant materials in the two soils under upland conditions mineralized at rates corresponding to half-lives between 4.4-6.6 years,while the corresponding figures for those under submerge conditions were between 6.5-13.1 years,Minera-liztion of residual organic N followed the same pattern as residual C.Compared to residual C,however,the mineralization rates of residual organic N in most cases were significantly lower and the percentages of added N retained in soils were higher.More N from plant materials was retained in the yellow-brown soil than in the red soil,but no consistent differences in the amounts of C from plant materials and in the mineraliztion rates of both residual C and residual organic N between the wto soils could be folund.
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| 关 键 词： | 半衰期 矿化作用 土壤 残留碳 残留有机氮 植物 分解 土地使用模式 |
Effect of land use pattern on mineralization of residual C and N from plant materials decomposing under field conditions |
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| CHENG Li-Li and WEN Qi-Xiao. Effect of land use pattern on mineralization of residual C and N from plant materials decomposing under field conditions[J]. Pedosphere, 1998, 8(4): 311-316 |
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| Authors: | CHENG Li-Li and WEN Qi-Xiao |
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| Affiliation: | Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008, China. |
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| Abstract: | Four kinds of plant materials(astragalus,azolla,rice straw and water hyacinth) were allowed to decom-pose for 10 years in two soils with different mineralogical characteristics in fields under upland and submerged conditions.Greater amounts of C and N from azolla were retained in soils throughout the 10-year experi-mental period compared to those from the other plant materials.The residual C of all the plant materials in the two soils under upland conditions mineralized at rates corresponding to half-lives between 4.4-6.6 years,while the corresponding figures for those under submerge conditions were between 6.5-13.1 years,Minera-liztion of residual organic N followed the same pattern as residual C.Compared to residual C,however,the mineralization rates of residual organic N in most cases were significantly lower and the percentages of added N retained in soils were higher.More N from plant materials was retained in the yellow-brown soil than in the red soil,but no consistent differences in the amounts of C from plant materials and in the mineraliztion rates of both residual C and residual organic N between the wto soils could be folund. |
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| Keywords: | half-life mineralization residual C residual organic N |
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