摘要
土壤关键化学元素的空间分布数据是烤烟种植规划的重要基础之一.基于2016年玉溪市65个典型烤烟种植乡镇采集的883个0~20 cm表层土壤样品,选取了有机质、pH值、水解性氮、有效磷、速效钾、有效硼和水溶性氯共7个因子.首先,采用模糊数学方法量化各因子的隶属度,并利用层次分析法(analytic hierarcty process,AHP)确定因子的权重.然后,通过加权求和计算各样点的土壤适宜性指数(soil fertility index,SFI).最后,使用普通克里格插值法得到全市土壤SFI的空间分布图,对玉溪市的植烟土壤进行评价.结果表明,影响玉溪市植烟土壤适宜性的关键化学元素因子按重要性排序依次为水溶性氯、水解性氮、速效钾、有机质、pH值、有效磷和有效硼.全市土壤适宜性分为优、良好和一般3个等级.其中,优等土壤主要分布在东部的华宁和澄江地区,中部的红塔区,西部的新平县,以及北部的易门县;一般等级的土壤主要分布在北部和中南部.在全市65个植烟乡镇中,17个乡镇的土壤适宜性达到优等,3个乡镇为中等,31个乡镇为良好,14个乡镇为一般.研究结果为玉溪市科学规划烤烟种植提供了土壤关键化学元素适宜性的重要参考.
The spatial distribution of key chemical elements in soil is a crucial foundation for tobacco cultivation planning.This study is based on 883 topsoil samples(0−20 cm)collected in 2016 from 65 typical tobacco-growing townships in Yuxi City.Seven factors were selected for analysis:organic matter,pH,hydrolyzable nitrogen,available phosphorus,available potassium,available boron,and water-soluble chlorine.First,fuzzy mathematics was employed to quantify the membership degree of each factor,and the analytic hierarchy process(AHP)was used to determine the weight of each factor.The soil fertility index(SFI)for each sample point was then calculated through weighted summation.Finally,ordinary Kriging interpolation was applied to generate a spatial distribution map of SFI across the city,enabling an evaluation of the suitability of tobaccogrowing soils in Yuxi.The results show that the key chemical elements influencing soil suitability,in order of importance,are water-soluble chlorine,hydrolyzable nitrogen,available potassium,organic matter,pH,available phosphorus,and available boron.Soil suitability across the city is categorized into three levels:excellent,good,and fair.Soils rated as excellent are primarily distributed in the eastern regions of Huaning and Chengjiang,the Central Hongta District,the Western Xinping County,and the Northern Yimen County,while fair soils are mainly found in the Northern and South-central regions.Among the 65 tobacco-growing townships,17 have soils rated as excellent,31 as good,14 as fair,and 3 as medium.The findings of this study provide a valuable reference for the scientific planning of tobacco cultivation in Yuxi City based on the suitability of key chemical elements in the soil.
作者
李兰
谢新乔
秦发侣
LI Lan;XIE Xinqiao;QIN Falv(School of Geography and Land Engineering,Yuxi Normal University,Yuxi 653100,Yunnan,China;Key Laboratory of Analysis of Interactions between Crops and Soils,Yuxi 653100,Yunnan,China;China National Tobacca Corporation Yunnan Company,Kunming 650000,Yunnan,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第5期972-979,共8页
Journal of Yunnan University(Natural Sciences Edition)
基金
云南省科技厅高校联合面上项目(202101BA070001-078).
关键词
烤烟
隶属度
层次分析法
土壤适宜性
普通克里格
玉溪
flue-cured tobacco
the grade of membership
analytichierarcty process
soil fertility index
ordinary Kriging
Yuxi
