赤水河下游3种林分类型土壤有机碳含量及影响因素分析  

Contents and factors Influencing Soil Organic Carbon of Three Forest Types in the Lower Reaches of Chishui River

作　　者：钟洪明 高艳平 母永秋 丁访军 周凤娇 

机构地区：[1]赤水市葫市楠竹林场,贵州赤水567404 [2]贵州省林业科学研究院,贵阳550005

出　　处：《湖北农业科学》2013年第23期5741-5746,共6页Hubei Agricultural Sciences

基　　金：贵州省林业厅重大项目(黔林科合[2010]重大01);国家林业局公益专项子项目(200704005/WB03)

摘　　要：对贵州赤水河下游杉木[Cunninghamia Lanceolata （Lamb.） var]林、马尾松[Pinus massoniana （Lamb.） Hook]林及竹[Phyllostachys edulis（Carr.） H.Delehaie]林土壤有机碳、碳密度及其垂直分配特征进行了研究,并探讨了土壤养分对其影响.结果表明,3种林分类型0～80 cm剖面土壤有机碳平均含量为竹林（15.46 g/kg）＞杉木林（13.78 g/kg）＞马尾松林（9.72g/kg）,差异显著;有机碳密度为杉木林（12.87kg/m2）＞竹林（11.73 kg/m2）＞马尾松林（8.21 kg/m2）,差异极显著;3种林分类型土壤有机碳含量和碳密度均随土层深度增加而逐渐降低,有机碳含量均为0～10 cm层最大,分别是剖面有机碳含量均值的1.47～2.30倍,而0～20 cm土壤碳密度分别占剖面碳密度的31.71％～47.83％,显著高于其他各层,土壤有机碳和碳密度均具较强的表聚性,应加强生态环境保护,避免人为活动和减少水土流失;杉木林和毛竹林影响土壤有机碳含量的主导因子为水解氮,而马尾松林为有效磷.The soil organic carbon,carbon density and the vertical distributions were studied and the influences of the soil nutrients on the soil organic carbon were tested in the Chinese fir forests,masson pine forests and bamboo forests in the lower reaches of Chishui River,Guizhou province.The results showed that the average contents of soil organic carbon in the 0～80cm deep soil profile from large to small in order were in the bamboo forests（15.46g/kg）,Chinese fir forests （13.78 g/kg）and Masson pine forests （9.72 g/kg） with obvious difference between them.The organic carbon density from large to small in order was in the Chinese fir forests （12.87 kg/m2）,bamboo forests （11.73 kg/m2） and Masson pine forests （8.21 kg/m2） with obvious difference between them.In all three forest types,the contents of soil organic carbon and the carbon density both deceased gradually with the deepening of the soil profiles.The contents of organic carbon were the highest in the 0～10 cm deep soil profile,1.47 to 2.30 times as many as the average contents of organic carbon of the whole soil profile.The organic carbon density in the 0～20 cm deep soil profile accounted for 31.71％ to 47.83％ that of the whole soil profile,obviously higher than that in any other soil profile.The soil organic carbon and the carbon density were considerably more fixed on the surface of the soil,which required for strengthening ecological protection to avoid human interventions and reduce the risks of soil and water erosion.The dominant factor influencing the contents of the soil organic carbon was the hydrolyzable nitrogen in the Chinese fir forests and the Moso bamboo forests,while that was the available phosphorus in the Masson pine forests.

关 键 词：林分类型 土壤有机碳 土壤碳密度 土壤养分 

分 类 号：S714.2[农业科学—林学]