摘要
【目的】研究保山植烟土壤pH与有机质及其组分、交换性酸(总量)、交换性盐基和离子含量的相关性,评价上述各因素对土壤pH的影响。【方法】以保山植烟耕层土壤为研究对象,采用Pearson correlation法进行相关性分析,采用偏最小二乘回归(PLS)法进行建模分析。【结果】(1)保山酸性土壤有机质及其组分、交换性酸(总量)、NO_(3)^(−)和SO_(4)^(2−)等含量高;碱性土壤交换性Ca^(2+)、交换性Mg^(2+)、HCO_(3)^(−)、Ca^(2+)和Mg^(2+)含量高。(2)相关分析性表明:土壤pH与有机质及其组分、交换性酸(总量)、NO_(3)^(−)和SO_(4)^(2−)等含量呈极显著负相关(P<0.01);与阳离子交换量(cation exchange capacty,CEC)以及交换性Ca^(2+)、交换性Mg^(2+)、HCO_(3)^(−)、Ca^(2+)和Mg^(2+)含量则呈极显著正相关(P<0.01);与胡敏酸含量呈显著正相关(P<0.05)。(3)偏最小二乘回归分析表明:影响保山植烟土壤pH的重要指标依次为:交换性H^(+)、HCO_(3)^(−)、交换性Ca^(2+)、Ca^(2+)、腐殖酸、交换性酸(总量)、交换性Mg^(2+)、SO_(4)^(2−)、交换性Al^(3+)和Mg^(2+)含量,而K^(+)、交换性K^(+)、富里酸、交换性Na^(+)和Na^(+)含量以及CEC为非重要指标。【结论】保山植烟土壤酸性的决定因素依次为:交换性H^(+)、腐殖酸、交换性酸(总量)、SO_(4)^(2−)和交换性Al^(3+)含量;土壤碱性的决定因素依次为:HCO_(3)^(−)、交换性Ca^(2+)、Ca^(2+)、交换性Mg^(2+)和Mg^(2+)含量。
[Purpose]To study the correlation between pH and organic matter and its components,exchangeable acid(total),exchangeable base,ion content of tobacco-planting soil in Baoshan,and to evaluate the influence of those factors on soil pH.[Method]Taking Baoshan tobacco planting topsoil as the research object,Pearson correlation method was used for correlation analysis,and partial least-squares regression(PLS)method was used for modeling analysis.[Results]1)The contents of organic matter and its components,exchangeable acid(total),NO_(3)^(−),SO_(4)^(2−)and so on in Baoshan acid soil were high;the contents of exchangeable Ca^(2+),exchangeable Mg^(2+),HCO_(3)^(−),Ca^(2+)and Mg^(2+)in alkaline soil were high.2)Correlation analysis showed that soil pH was extremely significant negat-ive correlation with organic matter and its components,exchangeable acid(total),NO_(3)^(−),SO_(4)^(2−)(P<0.01),and extremely significant positive correlation with cation exchange capacty(CEC),ex-changeable Ca^(2+),exchangeable Mg^(2+),HCO_(3)^(−),Ca^(2+),Mg^(2+)(P<0.01),and significant positive correlation with humic acid(P<0.05).3)The PLS regression analysis showed that the important indexes affecting soil pH in Baoshan were the contents of exchangeable H^(+),HCO_(3)^(−),exchangeable Ca^(2+),Ca^(2+),humic acid,exchangeable acid(total),exchangeable Mg^(2+),SO_(4)^(2−),exchangeable Al^(3+)and Mg^(2+).The contents of K^(+),exchangeable K^(+),fulvic acid,exchangeable Na^(+),Na^(+),CEC were not important indexes.[Conclusion]The determination factors of acidity of tobacco planting soil in Baoshan were the contents of exchangeable H^(+),humic acid,exchangeable acid(total),SO_(4)^(2−),exchangeable Al^(3+);the determining factors of alkalinity were the contents of HCO_(3)^(−),exchangeable Ca^(2+),Ca^(2+),exchangeable Mg^(2+)and Mg^(2+).
作者
胡志明
谢龙杰
段必挺
吴绍梅
张儒和
杨绍帮
汪林
杨懋杰
HU Zhiming;XIE Longjie;DUAN Biting;WU Shaomei;ZHANG Ruhe;YANG Shaobang;WANG Lin;YANG Maojie(Baoshan Branch of Yunnan Tobacco Company,Baoshan 678000,China;Hunan Zhongyan Industry Co.,Ltd.,Changsha 410014,China)
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第1期177-183,共7页
Journal of Yunnan Agricultural University:Natural Science
基金
中国烟草总公司云南省公司科技计划项目(2017YN25,2020530000241021)。
