| 宜宾地区土壤有效态微量元素空间变异特征及影响因素 |
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| 引用本文： | 张浩,张新,李启权,王昌全,周泽弘,向金友,易蔓,杨洋.宜宾地区土壤有效态微量元素空间变异特征及影响因素[J].土壤通报,2017(3):575-582. |
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| 作者姓名： | 张浩 张新 李启权 王昌全 周泽弘 向金友 易蔓 杨洋 |
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| 作者单位： | 1. 四川农业大学资源学院,四川成都,611130;2. 筠连县筠连镇政府,四川宜宾,645250;3. 四川省烟草公司宜宾市公司,四川宜宾,644002 |
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| 基金项目： | 中国烟草总公司四川省公司科技项目(scyc201402006)，四川省教育厅科研项目(16ZB0048) |
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| 摘 要： | 为揭示宜宾地区土壤有效态微量元素含量空间变异特征及影响因素,采用地统计学、相关分析及回归分析等方法,结合GIS技术对研究区6种土壤有效态微量元素进行分析。结果表明:研究区土壤有效态Fe、Mn、Cu和Zn含量达丰富及以上水平,有效Mo含量适中,而有效B含量则处于缺乏水平,均值为0.24 mg kg~(-1)。半方差结果表明,6种指标均具有中等强度的空间自相关性,其空间变异受结构性因素和随机性因素共同影响。空间分布上,土壤有效Mo呈现出由西北逐渐向东南递增,有效B则呈现出大块面状缺乏,而其他4种元素总体表现为西南-东北沿线上含量相对较低,沿线两侧含量丰富的分布格局。影响因素分析表明,6种元素与pH总体呈极显著负相关,与有机质和氮素呈现极显著正相关;不同土壤类型对有效态微量元素含量具有一定的显著影响;海拔和坡度与有效态微量元素之间存在显著关系;而6种土壤有效态微量元素均在一熟和三熟制中平均含量相对较高。总体来看,土壤化学性状对土壤微量元素的空间变异作用强于土壤类型、地形因子和熟制。
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| 关 键 词： | 微量元素 空间变异 影响因素 宜宾地区 |
Spatial Variability of Soil Available Microelement and Its Influencing Factors in Yibin |
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| ZHANG Hao,ZHANG Xin,LI Qi-quan,WANG Chang-quan,ZHOU Ze-hong,XIANG Jin-you,YI Man,YANG Yang.Spatial Variability of Soil Available Microelement and Its Influencing Factors in Yibin[J].Chinese Journal of Soil Science,2017(3):575-582. |
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| Authors: | ZHANG Hao ZHANG Xin LI Qi-quan WANG Chang-quan ZHOU Ze-hong XIANG Jin-you YI Man YANG Yang |
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| Abstract: | Geostatistics,correction analysis,regression analysis and GIS technology were used to clarify the spatial variability of soil available microelements including Fe,Mn,Cu,Zn,Mo and B and explore their influencing factors.The results indicated that the contents of soil available Fe,Mn,Cu and Zn were above the rich levels in the study area.Available Mo content was at the medium level while available B was lacked at the poor level with an average of 0.24 mg kg-1.Based on semi-variance analysis results,the contents of six soil available microelements all belonged to moderate spatial autocorrelation,which indicated that they were affected by both structural and random factors.For the spatial distribution,soil available Mo increased gradually from northwest to southeast while soil available B was deficient in the most study area.The rest microelements showed similar tendencies with higher values along the southwest to northwest but lower values along the two sides.The six microelements were negatively correlated with pH while positively correlated with soil organic matter,total nitrogen and alkali-hydrolyzed nitrogen.Soil type had significant effects on the contents of soil available microelement.Altitude and slope had significant correlation with soil available microelement contents.All the six available microelements showed higher values both in the one-year and three-year cropping system.In total,the effect of chemical characteristics on the spatial variation of soil available microelements was stronger than that of soil type,topographical factor and cropping system. |
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| Keywords: | Soil available microelement Spatial variability Influencing factors Yibin |
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