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| 不同利用方式对潮棕壤比表面影响的研究 | |
| 引用本文： | 张玉革,姜勇,张玉龙.不同利用方式对潮棕壤比表面影响的研究[J].土壤通报,2006,37(3):438-442. |
| 作者姓名： | 张玉革 姜勇 张玉龙 |
| 作者单位： | 1. 中国科学院,沈阳应用生态研究所,辽宁,沈阳,110016;沈阳农业大学,土地与环境学院,辽宁,沈阳,110161 2. 中国科学院,沈阳应用生态研究所,辽宁,沈阳,110016 3. 沈阳农业大学,土地与环境学院,辽宁,沈阳,110161 |
| 基金项目： | 辽宁省博士科研项目;国家重点基础研究发展计划(973计划) |
| 摘 要： | 对中国科学院沈阳生态实验站潮棕壤水稻田、玉米地、撂荒地和人工林地4种土地利用方式经过14年后在0~150 cm土体10个土层中土壤比表面的剖面分布进行比较研究的结果表明,不同土地利用方式及不同深度土层土壤比表面差异显著,除林地0~5 cm表层外,4种土地利用方式在80 cm以内深度的土层中土壤比表面随剖面深度增加呈渐次增大的趋势,说明林地表层高有机碳积累对土壤比表面增加可能产生了重要影响。150 cm深度土壤比表面平均值为林地>玉米地>撂荒地>水稻田。土壤比表面与土壤风干含水量及交换性盐基总量呈极显著正相关关系:水稻田、玉米地、撂荒地、林地中土壤比表面与风干含水量相关系数分别为0.767、0.911、0.943、0.953(n=30,P<0.001);与土壤交换性盐基总量的相关系数分别为0.877、0.978、0.673、0.780(n=30,P<0.001)。不同利用方式下土壤比表面与土壤有机碳、全氮、碱解氮呈显著负相关关系,与土壤pH、硫、磷之间的关系因土地利用方式不同而具有一定的差异。研究结果表明,土壤比表面可作为指征不同土地利用方式对土壤理化性质影响的可行的土壤物理学指标,测定不同土壤的比表面可以基本反映出土壤交换性能的差异。 |
| 关 键 词： | 潮棕壤 土地利用 土壤比表面 土壤水 土壤交换性盐基 |
| 文章编号： | 0564-3945(2006)03-0438-05 |
| 修稿时间： | 2005年2月2日 |
Depth Profile Distribution of Soil Specific Surface Area in an Aquic Brown Soil as Affected by Land Use |
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| ZHANG Yu-ge,JIANG Yong,ZHANG Yu-long.Depth Profile Distribution of Soil Specific Surface Area in an Aquic Brown Soil as Affected by Land Use[J].Chinese Journal of Soil Science,2006,37(3):438-442. | |
| Authors: | ZHANG Yu-ge JIANG Yong ZHANG Yu-long |
| Abstract: | This study examined the dynamics and depth profile distribution of soil specific surface area(SSA) in an aquic brown soil at the Shenyang Experimental Station of Ecology,Chinese Academy of Sciences under four land use patterns,i.e.,paddy field(PF),maize field(MF),fallow field(FF),and woodland(WL),over 14 years.In each pedon at the depth of 0-150 cm,soil samples were collected from ten layers.The results showed that the SSA was significantly different under different land uses and depths.In the layers within the depth of 80 cm,SSA tended to increase with the increasing of soil depth under the four land uses,except for WL in the 0-5 cm surface layer.The comparatively greater SSA in the surface layer of WL compared with that of the other three land uses may reflect the effect of soil organic carbon accumulation in WL on SSA. The mean value of SSA at the depth of 150 cm was in order of WL>MF>FF>PF.The coefficients of correlation between SSA and air-dry soil moisture content were 0.767,0.911,0.943 and 0.953(n=30,P<0.001) in PF,MF,FF,and WL,respectively, and those between the sum of exchangeable base cations and SSA were 0.877,0.978,0.673,and 0.780(n=30,P<0.001) in PF,MF,FF,and WL,respectively.Soil SSA was negatively correlated with soil organic carbon,total nitrogen,and available nitrogen concentrations under the four land use patterns,however,the relationships between SSA and soil pH,sulfur and phosphorus were different among different land uses.It is suggested that SSA as a soil physical index be effective to indicate the influences of land use on soil physical-chemical property variations.It is also suggested that as an easy measured parameter,SSA should be regarded as an index to represent fundamentally the exchange capacity of varied soils. |
| Keywords: | Aquic brown soil Land use Soil specific surface area Soil water Soil exchangeable base |
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