鄂尔多斯高原西部土壤地力评价及其养分因子相关性分析研究——以鄂托克旗为例  

Evaluation of Soil Fertility and Correlation Analysis of Nutrient Factors in Western Ordos Plateau——Taking the Etuoke Banner as an Example

作　　者：高凌智 李彬 马金慧[4] 黄斌 窦旭 GAO Ling-zhi;LI Bin;MA Jin-hui;HUANG Bin;DOU Xu(Institute of Resources,Environment and Detection Technology,Inner Mongolia Academy of Agriculture and Animal Husbandry Sciences,Hohhot 010010,China;College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;High-efficiency Water-saving Technology and Equipment and Water and Soil Environmental Effects,Inner Mongolia Autonomous Region Engineering Research Center,Hohhot 010018,China;Collegeof Agriculture,Inner Mongolia Minzu University,Tongliao 028043,China;Inner Mongolia Etuoke Banner Agricultural Technology Extension Station,Etuoke Banner 016100,China)

机构地区：[1]内蒙古自治区农牧业科学院资源环境与检测技术研究所,内蒙古呼和浩特010010 [2]内蒙古农业大学水利与土木建筑工程学院,内蒙古呼和浩特010018 [3]高效节水技术装备与水土环境效应内蒙古自治区工程研究中心,内蒙古呼和浩特010018 [4]内蒙古民族大学农学院,内蒙古通辽028043 [5]内蒙古鄂托克旗农业技术推广站,内蒙古鄂托克旗016100

出　　处：《内蒙古民族大学学报（自然科学版）》2022年第2期118-123,184,共7页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：国家重点研发计划课题(2016YFC0400305);内蒙古自治区自然科学基金项目(2020MS05049);内蒙古自治区“科技兴蒙”行动重点专项;内蒙古民族大学博士科研启动基金项目(BS485)。

摘　　要：以鄂尔多斯高原的鄂托克旗为研究区域,通过野外实测与室内试验分析,结合统计与相关性分析方法探索鄂托克旗土壤pH值、有机质、全氮、碱解氮、有效磷、速效钾含量特征以及各因子之间的相关关系。结果表明,试验区土壤均属于碱性土,pH值为7.20~9.90,且碱性相对较强,土壤有机质平均值为5.00 g·kg^(-1)(六级)、全氮平均值为 0.36 g·kg^(-1)(六级)、碱解氮平均值为 24.85 mg·kg^(-1)(六级)、有效磷平均值为 7.41 mg·kg^(-1)(缺乏)、速效钾平均值为129.87 mg·kg^(-1)(中等),土壤养分含量较为缺乏,土地比较贫瘠。从土壤养分的变异系数来看,土壤pH值变异系数为2.864%,小于10%,属于弱变异性。有机质、全氮、碱解氮、有效磷、速效钾变异系数均在 10%~100%之间,均属于中等变异性,其中,有效磷和碱解氮变异性相对较大,变异系数分别为91.903%和72.354%,有机质、全氮、速效钾变异性相对较小,分别为49.800%、38.889%、37.915%。相关性研究表明,土壤pH值与除速效钾外的其他养分含量均有较强的相关性,其中,有机质、全氮、碱解氮含量与pH值呈显著负相关(P<0.01),pH 值越低,有机质、全氮、碱解氮含量越高,有效磷含量与 pH 值呈显著正相关(P<0.05),pH值越低,有效磷含量也越低。速效钾含量与pH值无显著相关关系,其中,有机质与全氮、碱解氮、有效磷、速效钾4种养分均呈现显著正相关关系(P<0.01)。Taking Etuoke Banner in the Ordos Plateau as the research area,soil p H value,the content characteristics of organic matter,total nitrogen,alkali-hydrolyzable nitrogen,available phosphorus,available potassium and the correlation between the factors in Etuoke Banner were explored through field measurement and laboratory test analysis,combined with statistics and correlation analysis methods. The results showed that the soil in the experimental area was all alkaline soil with p H value of 7.20~9.90 and relatively strong alkalinity,and the average value of soil organic matter was 5.00 g·kg^(-1)(grade 6)and the average value of total nitrogen was 0.36 g·kg^(-1)(grade 6)and the average value of alkali-hydrolyzable nitrogen was 24.85 mg·kg^(-1)(grade 6)and the average value of available phosphorus was 7.41mg·kg^(-1)(deficient),and the average value of available potassium was 129.87 mg·kg^(-1)1(moderate). In addition,the soil nutrient content was relatively scarce,and the land was relatively barren. From the variation coefficient of soil nutrients,the variation coefficient of soil p H value was 2.864%,less than 10%,which belonged to weak variability.The variation coefficients of organic matter,total nitrogen,alkali-hydrolyzable nitrogen,available phosphorus and available potassium ranged from 10% to 100%,belonging to medium variability. Among them,the variability of available phosphorus and alkali-hydrolyzable nitrogen was relatively large and their variation coefficients were 91.903% and72.354%,respectively but the variability of organic matter,total nitrogen and available potassium was relatively small,which were 49.800%,38.889% and 37.915%,respectively. Correlation study showed that soil pH was strongly correlated with the contents of other nutrients except available potassium. Among them,the contents of organic matter,total nitrogen,and alkali- hydrolyzable nitrogen were significantly negatively correlated with p H value(P<0.01). The lower the p H value,the higher the contents of organic matter,total nitrogen a

关 键 词：鄂尔多斯高原 PH值 土壤养分 相关性分析 

分 类 号：S158[农业科学—土壤学]