轻中度盐碱地土壤有机质空间异质性及影响因素分析——以山东省黄河三角洲农业高新技术示范区为例  

Spatial Heterogeneity and Influencing Factors of Soil Organic Matter in Light and Moderate Saline-Alkali Soil-A Case Study of the Agricultural High-tech Industry Demonstration Area of the Yellow River Delta

作　　者：陈梦 刘汉文 马倩 张奕 李可心 刘志鑫 李洪秀 Chen Meng;Liu Hanwen;Ma Qian;Zhang Yi;Li Kexin;Liu Zhixin;Li Hongxiu(College of Resources and Environmental Engineering,Ludong University,Yantai 264025,China;Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai 264000,China;Beijing Forestry University,Beijing 100083,China;National Technology Innovation Center for Comprehensive Utilization of Saline-Alkali Land,Dongying 257300,China;Shandong Saline-Alkali Land Modern Agriculture Co.,Ltd.,Dongying 257300,China)

机构地区：[1]鲁东大学资源与环境工程学院,山东烟台264025 [2]中国科学院烟台海岸带研究所,山东烟台264000 [3]北京林业大学,北京100083 [4]国家盐碱地综合利用技术创新中心,山东东营257300 [5]山东盐碱地现代农业有限责任公司,山东东营257300

出　　处：《山东农业科学》2024年第1期139-146,共8页Shandong Agricultural Sciences

基　　金：山东省重点研发计划(重大科技创新工程)项目(2021SFGC0301,2020CXGC010804);国家重点研发计划项目(2021YFD1900902);黄三角国家农高区科技专项(2022SZX01)。

摘　　要：以黄河三角洲轻中度盐碱地典型分布区(山东省黄河三角洲农业高新技术示范区,以下简称黄三角农高区)为研究区域,于2021年10月采用网格布点法,对该区域土壤进行野外采样调查,利用地统计学和结构方程模型等方法,探究不同土层有机质含量的空间变异规律与影响因素,以期为轻中度盐碱地土壤资源合理利用提供参考。结果表明,黄三角农高区土壤有机质含量[0~20 cm土层为(15.85±5.69) g/kg;20~40 cm土层为(11.51±4.32) g/kg]属于4级,整体呈现中等变异。20~40 cm土层有机质含量的空间相关和自相关性高于0~20 cm土层。有机质含量与土壤粉粒含量和黏粒含量均呈显著正相关,与含盐量呈显著负相关。东部滨海地区有机质含量低于中部地区,呈现耕地>林地>荒地的趋势,人为利用(耕地、林地)提升了土壤有机质含量。离海距离对土壤有机质含量有直接影响,较高的pH值和粉黏比是影响土壤有机质积累的重要因素。本研究明确了黄三角农高区不同土层土壤有机质分布格局,揭示了土地利用类型对有机质含量的影响以及土壤有机质积累的限制因素,可为该区轻中度盐碱地农业生产规划提供参考。This study was conducted in the Agricultural High-tech Industry Demonstration Area of the Yellow River Delta,which possessed a light and moderate saline-alkali lands.Soil samples were collected u-sing the grid distribution method in October 2021.The spatial variability and impact factors of organic matter content in different soil layers were studied using geostatistics,structural equation model and other methods.The purpose of this study was to provide a reference for the utilization of light and moderate saline-alkali lands.The results showed that the soil organic matter content as(15.85±5.69)g/kg in 0~20-cm layer and(11.51±4.32)g/kg in 20~40-cm layer in the Agricultural High-tech Industry Demonstration Area of the Yellow River Delta belonged to the fourth grade showing the medium variation overall.The spatial correlation and autocorre-lation of organic matter content in 20~40-cm soil layer were higher than those in 0~20-cm soil layer.The con-tent of organic matter was significantly positively correlated with the content of soil silt and clay,and negatively correlated with the salt content.The organic matter content in eastern coastal region was lower than that in cen-tral region,and showed a trend of cultivated land>forest land>wasteland.The exploitative lands had higher content of soil organic matter.The distance from the sea directly influenced the soil organic matter in this study area,and high pH value and silt to clay ratio were important factors limiting the accumulation of soil organic matter.The results of this study clarified the distribution pattern of soil organic matter in different soil layers in the Agricultural High-tech Industry Demonstration Area of the Yellow River Delta,revealed the impact of land use types on organic matter content and the factors limiting soil organic matter accumulation,and could pro-vide a reference for agricultural production planning of light and moderate saline-alkali lands in this area.

关 键 词：轻中度盐碱地 黄河三角洲 土壤有机质 空间异质性 空间自相关 

分 类 号：S159[农业科学—土壤学]