便携式土壤多参数快速检测仪原位测量东北黑土pH  

Quick Acquisition of Black Soil pH Values from Northeast China by Portable Soil Multi-parameter Rapid Detection Instrument

作　　者：张凤 胡文友[1,2] 王亮亮 李德成 张超[4] 谢恩泽 严国菁 姜军 徐仁扣 ZHANG Feng;HU Wenyou;WANG Liangliang;LI Decheng;ZHANG Chao;XIE Enzhe;YAN Guojing;JIANG Jun;XU Renkou(State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 211135,China;University of Chinese Academy of Sciences,Beijing 100049,China;SmartSensor Co.Ltd.,Nanjing 211111,China;College of Land Science and Technology,China Agricultural University,Beijing 100193,China)

机构地区：[1]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京211135 [2]中国科学院大学,北京100049 [3]南京思摩特传感器有限公司,南京211111 [4]中国农业大学土地科学与技术学院,北京100193

出　　处：《土壤学报》2024年第6期1568-1576,共9页Acta Pedologica Sinica

基　　金：国家重点研发计划项目(2021YFD1500202);中国科学院战略性先导科技专项项目(XDA28010100);国家重点农业科技项目(NK2022180104)资助。

摘　　要：土壤pH是耕地质量的重要指标之一,准确快速获取土壤pH对数字农业具有重要意义。以我国东北黑土地区耕地土壤为研究对象,利用便携式土壤多参数快速检测仪(SHMI2000)对辽河平原和松嫩平原黑土pH进行原位测量,并将结果与实验室电位法(HJ 962—2018)测定结果比较。结果发现:(1)实验室电位法测定我国黑土区表层和亚表层黑土pH分别为4.04~10.09和4.01~10.06,平均值分别为6.13和6.47,变异系数分别为19.64%和18.37%,属于中等变异强度。整体上,黑土呈现西南(黑龙江西部、吉林北部和内蒙古南部地区)偏碱,东部(三江平原)、北部(松嫩平原)和黑龙江、吉林、辽宁三省南部偏酸的空间分布格局。(2)利用SHMI2000在野外原位测定了表层和亚表层土壤pH,与HJ 962—2018法测定的pH具显著相关,皮尔逊相关系数r达到0.81(P=9.11×10^(-52))(3)以0.2个单位的原位pH为步长,对两种方法获得的黑土pH进行移动平均处理后,皮尔逊相关系数r提高至0.93。因此,SHMI2000原位测定黑土pH准确可靠,适合东北黑土pH的快速获取。【Objective】Soil pH is a crucial indicator of arable land quality.Therefore,precise and rapid measurement of soil pH is essential for the implementation of digital agriculture.【Method】In the present study,pH levels of the black soil in the Liaohe and Songnen plains were determined in situ using a self-developed portable soil multi-parameter rapid detection instrument(SHMI2000).The results were compared to those obtained in the laboratory using the potentiometry method(HJ 962-2018).【Result】(1)The laboratory observations showed that surface and subsurface soil pH values ranged from 4.04 to 10.09,and 4.01 to 10.06,respectively.The mean values were 6.13 and 6.47,and the variation coefficient values were moderate at 19.64% and 18.37%,respectively.The study also revealed that the soils in the southwest black soil area were predominantly alkaline,whereas the soils in the east(Sanjiang Plain),north(Songnen Plain),and south(particularly in the Southern Heilongjiang,Jilin,and Liaoning Provinces)were acidic in nature.(2)The Pearson correlation analysis showed a strong relationship(correlation coefficient of 0.81,P=9.11×10^(-52))between pH values obtained in situ and laboratory conditions.(3)The correlation coefficient increased to 0.93 after the moving average process,using 0.2 pH units as step size.【Conclusion】Therefore,the SHMI2000 instrument can accurately and reliably acquire black soil pH values in situ.

关 键 词：黑土 土壤PH 原位测量 电位法 移动平均法 

分 类 号：S153.1[农业科学—土壤学]