摘要
pH值是土壤的重要化学性质,会对土地生产力产生重要影响。为掌握河南省土壤pH值近年来变化状况,本文采用空间统计方法,基于河南省第二次土壤普查及2015年土壤p H值数据对近30年该省土壤p H值时空变化及其影响因素进行了分析。结果表明:(1)河南省土壤p H值总体上呈下降趋势。全省平均土壤pH值由20世纪80年代的7.62降至2015年的7.17,下降了0.45个单位。p H值为碱性的土壤与中性土壤面积大幅度下降,弱碱性土壤和弱酸性土壤面积增加,增加比例为18.84%和22.42%。(2)第二次土壤普查结果河南省酸性土壤主要分布于南部地区、西部地区,土壤pH值最高的土壤分布于东部地区;2015年酸性土壤主要分布于南部地区,土壤pH值平均值为5.95;土壤pH值最高土壤主要分布于北部地区。(3)信阳中部的水稻土、南阳及驻马店山地丘陵的黄褐土和砂姜黑土上,水稻土、黄褐土和砂姜黑土成为pH值最低的三个土类。(4)广泛分布于河南省西部和北部山区的褐土pH值在各土类中最高,且近30年下降幅度最小;(5)近30年来土壤pH值的变化幅度在降水量小于1250mm时与其呈负相关,与海拔呈正相关。
PH value is an important chemical property of soil, which will have an important impact on land productivity. In order to understand the changes of soil pH in Henan Province in recent years, the spatial and temporal changes of soil pH in Henan Province in recent 30 years and their influencing factors were analyzed based on the second Soil Census in Henan Province and the soil pH data in 2015. The results showed that:(1) Soil pH value in Henan Province showed a downward trend on the whole. The average soil pH value of the whole province decreased from 7.62 in 1980 s to 7.17 in 2015, which decreased by 0.45 units. The area of alkaline soil and neutral soil decreased significantly, while that of weak alkaline soil and weak acidic soil increased by 18.84% and 22.42%.(2)The results of the second soil survey showed that the acidic soils in Henan Province were mainly distributed in the southern and Western regions, and the soils with the highest soil pH value were mainly distributed in the eastern region;in 2015, the acidic soils were mainly distributed in the southern region, with the average soil pH value of 5.95;and the soils with the highest soil pH value were mainly distributed in the northern region.(3) On paddy soil in the middle of Xinyang, yellow cinnamon soil in the hilly areas of Nanyang and Zhumadian, paddy soil, yellow cinnamon soil and sand ginger black soil became the three soil types with the lowest pH value.(4) The pH value of cinnamon soil widely distributed in the western and northern mountainous areas of Henan Province is the highest among all kinds of soils, and the decrease is the smallest in the past 30 years;(5) In the past 30 years, the variation of soil pH value was negatively correlated with precipitation less than 1250 mm, and positively correlated with altitude.
作者
张驭航
李玲
王秀丽
路婕
ZHANG Yu-hang;LI Ling;WANG Xiu-li;LU Jie(College of resources and environment,Henan Agricultural University,Zhengzhou 450002,China;Henan Engineering Research Center of Land Consolidation and Ecological Restoration,Zhengzhou 450002,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2019年第5期1091-1100,共10页
Chinese Journal of Soil Science
基金
国家自然基金项目（41201209）
河南省科技攻关项目（182102110073）资助
关键词
空间统计方法
土壤PH值
时空分布
河南省
Spatial statistical methods
soil pH value
Space-time distribution
Henan Province
