| 太湖地区土壤中氮和速效磷的空间变异 |
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| 引用本文： | 朱红霞,陈效民,方堃,庾亮.太湖地区土壤中氮和速效磷的空间变异[J].江苏农业学报,2008,24(6). |
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| 作者姓名： | 朱红霞 陈效民 方堃 庾亮 |
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| 作者单位： | 1. 南京农业大学资源与环境科学学院,江苏,南京,210095;南京信息工程大学,江苏,南京,210044
2. 南京农业大学资源与环境科学学院,江苏,南京,210095 |
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| 基金项目： | 国家自然科学基金项目(40371055) |
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| 摘 要： | 对太湖地区2种主要水稻土类型白土和乌栅土在土壤剖面中氮素和速效磷含量的空间变异进行了研究。结果显示：NH_4^＋ -N在土壤剖面中的空间变异为从土壤上层到下层呈逐渐递减趋势，以表土层含量为最高，表层以下基本上趋于稳定；硝态氮含量随土层深度的加深呈现逐渐降低的趋势。速效磷的空间变异不如NH_4^＋ -N明显，白土中速效磷呈由表层随土层深度的增加而增加，在12～20cm土层达到最大，接着又随土层深度的增加而降低，乌栅土基本呈逐渐下降的趋势；2种土壤中pH值变化不大，但均呈升高趋势。
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| 关 键 词： | 太湖地区 农田土壤 空间变异 |
Spatial Variation of Nitrogen and Available Phosphorus in Soil of Taihu Lake Region |
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| ZHU Hong-xia,CHEN Xiao-min,FANG Kun,YU Liang.Spatial Variation of Nitrogen and Available Phosphorus in Soil of Taihu Lake Region[J].Jiangsu Journal of Agricultural Sciences,2008,24(6). |
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| Authors: | ZHU Hong-xia CHEN Xiao-min FANG Kun YU Liang |
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| Abstract: | Spatial variation of nitrogen and available phosphorous in soil profiles of farmland soil(two main paddy soils,Whitish soil and Wushan soil).The results were as follows.The NH+4-N and NO-3-N contents in soil profiles gradually decreased from surface soil layer to bottom soil layer.NH+4-N content was keep stable below surface soil.The available phosphorus was accumulated more as the Whitish soil,went deeper,and reached the maximum content.12-20 cm betow surface soil.However,the available phosphorus declined ... |
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| Keywords: | Taihu Lake region farmland soil spatial variation |
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