马龙植烟土壤pH值分布特征及其主控因素研究  

Distribution characteristics and influencing factors of pH value in tobacco growing soil in Malong

作　　者：周子方 解燕[3] 易克[4] 王瑞宝 刘加红[3] 何志明 杜坚 李强[1] ZHOU Zi-fang;XIE Yan;YI Ke;WANG Rui-bao;LIU Jia-hong;HE Zhi-ming;DU Jian;LI Qiang(College of Agronomy,College of Bioscience and Biotechnology,Institute of Tobacco,Hunan Agricultural University,Changsha 410128;China Tobacco Jiangsu Industrial Co.,Ltd.,Nanjing 210019;Yunnan Provincial Tobacco Company Qujing Branch,Qujing 655000;China Tobacco Hunan Industrial Corporation Ltd.,Changsha 410019)

机构地区：[1]湖南农业大学农学院,生物科学技术学院,烟草研究院,湖南长沙410128 [2]江苏中烟工业有限责任公司,江苏南京210019 [3]云南省烟草公司曲靖市公司,云南曲靖655000 [4]湖南中烟工业有限责任公司,湖南长沙410019

出　　处：《中国土壤与肥料》2019年第5期8-13,共6页Soil and Fertilizer Sciences in China

基　　金：云南省烟草公司项目“曲靖市精益烟叶生产研究与应用”(2014YN24);江苏中烟工业有限责任公司科技开发项目(JSZY201717);湖南中烟工业有限责任公司项目(201843000934131)

摘　　要：为探明马龙植烟土壤pH值状况,为马龙烟区土壤保育提供科学依据,在马龙烟区采集土壤样品214个,利用多元统计学和地统计学方法分析了土壤pH值空间变异及其影响因素。结果表明:描述性统计结果显示,马龙植烟土壤pH值平均为5.43,pH值小于5.5的植烟土壤占61.21%,pH值大于5.5的植烟土壤占38.79%;各县植烟土壤pH均值在5.18~5.66。地统计分析结果显示,植烟土壤pH值空间结构为指数模型,空间变异主要由随机因子和结构因子共同决定,空间分布表现为不同等级插花状分布。影响因素的分析结果显示,有效钙、有效镁、土壤类型、碱解氮、土壤质地、有效硫是影响植烟土壤pH值的主控因素,6项指标对植烟土壤pH值的累计解释能力达86.2%,其中以有效钙的独立解释最大,可解释其变异的50.9%,土壤有效钙含量为主要控酸因子;土壤碱解氮含量为土壤主要致酸因子。本研究结果为酸性植烟土壤改良提供了理论依据。In order to find out the soil pH value status of Malong tobacco planting area and provide scientific basis for soil conservation,214 soil samples were collected in Malong tobacco planting area.The results showed that the average pH value of Malong tobacco planting soil was 5.43,pH values of 61.21%soil samples were less than 5.5,38.79%were greater than 5.5,and the average pH value of tobacco planting soil for each county was between 5.18~5.66.The results of geostatistical analysis showed that the spatial structure of soil pH value met with exponential model,and the spatial variability was mainly determined by random factors and structural factors.The spatial distribution of soil pH value was flower-arranging in different grades.The results showed that available Ca,available Mg,soil type,alkali-hydrolyzable N,soil texture and available S were the main factors affecting soil pH value.The accumulative explanatory ability of six indicators to soil pH value of tobacco planting reached 86.2%.Among them,the independent explanatory ability of available Ca was the largest,which could explain 50.9%of the variation.Available Ca and available Mg were the main acid controlling factor,and alkali hydrolyzed N were the main soil acid factors.The results provided a theoretical basis for the improvement of acidic tobacco planting soil.

关 键 词：马龙 植烟土壤 PH值 空间变异 

分 类 号：S15[农业科学—土壤学]