摘要
以吉林省长春市农安县为研究区域,采用五点取样法进行样品采集并测定土壤有机质含量和pH,结合地统计学方法和GIS技术,探究该区域黑土有机质与pH的空间分布规律、变异程度及相关性,为黑土资源的合理利用、土壤肥力提升和农业可持续发展提供科学依据。结果表明:(1)土壤有机质含量在7.25~38.82 g/kg之间,平均值为23.47 g/kg,农安县土壤有机质属于第3分级(20~30 g/kg),变异系数为22.24%,属中变异性。土壤pH在3.69~9.58之间,平均值为6.92,农安县土壤pH属于第1分级(6.0~7.5),变异系数为15.46%,属中变异性。(2)进行克里金插值时,土壤有机质的最佳理论模型为球状模型,土壤pH的最佳理论模型为指数模型,土壤有机质和pH块金系数分别为25.68%和0.04%。土壤有机质块金系数介于25%~75%之间,表明土壤有机质具有中度的空间相关性。而土壤pH块金系数小于25%,表明土壤pH的空间相关性强。(3)土壤有机质和pH的皮尔逊相关系数为0.303,表明两者之间存在弱的正相关关系。这一结果表明,在农安县的整体范围内,土壤有机质含量的增加会在一定程度上伴随着pH微弱上升,但这种关联程度并不强烈,意味着除了有机质含量外,还有其他多种因素共同影响土壤pH的空间变化。在实际农业生产种植过程中,需要充分考虑土壤有机质和pH的相关影响,通过合理的土壤管理和施肥措施,调节土壤的有机质含量和pH,为作物提供良好的生长环境,以实现高产优质的目标。
This study focuses on Nongan County,Changchun City,Jilin Province.The five-point sampling method is used to collect samples and measure soil organic matter content as well as pH value.Combining geostatistical methods and GIS technology,we explore the spatial distribution law,variation degree,and correlation of black soil organic matter and pH in this area,aiming to provide scientific basis for the rational utilization of black soil resources,soil fertility improvement,and sustainable agricultural development.The results show that:(1)The soil organic matter content ranges from 7.25 to 38.82 g/kg,with an average of 23.47 g/kg.The soil organic matter in Nong an County is in the third grade(20~30 g/kg),with a coefficient of variation of 22.24%,indicating moderate variability.The soil pH ranges from 3.69 to 9.58,with an average of 6.92.The soil pH in Nong an County is in the first grade(6.0~7.5),with a coefficient of variation of 15.46%,indicating moderate variability.(2)When performing Kriging interpolation,we find the optimal theoretical models for soil organic matter is spherical models and soil pH is exponential models,with soil organic matter and soil pH block coefficients of 25.68%and 0.04%respectively.The soil organic matter block gold coefficient ranges from 25%to 75%,indicating moderate spatial correlation of soil organic matter.The soil pH block coefficient is less than 25%,indicating strong spatial correlation of soil pH.(3)The Pearson correlation coefficient between soil organic matter and soil pH is 0.303,indicating a weak positive correlation between the two.This result shows that within the overall scope of Nong an County,the increase in soil organic matter content will moderately be accompanied by a slight increase in pH value,suggesting that in addition to organic matter content,there are other factors that jointly affect the spatial variation of soil pH.It is necessary to fully consider the related effects of soil organic matter and pH value in the actual agricultural production and planting process.Through reasonable soil management and fertilization measures,the organic matter content and pH value of the soil can be adjusted to provide a good growth environment for crops,in order to achieve the goal of high yield and high quality.
作者
李欣桐
梁立恒
王海涛
韦森超
邓守奇
LI Xintong;LIANG Liheng;WANG Haitao;WEI Senchao;DENG Shouqi(School of Geographic Sciences,Changchun Normal University,Changchun 130032,China;Changchun City Arts and Sciences High School,Changchun 130051,China)
出处
《长春师范大学学报》
2025年第10期83-90,共8页
Journal of Changchun Normal University
基金
吉林省自然科学基金项目(YDZJ202201ZYTS563)。
关键词
黑土
土壤有机质
土壤PH
空间变异
black soil
soil organic matter
soil pH
spatial variation
