龙山县植烟土壤 pH时空变异与影响因子研究
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作者单位:

(1.湖南农业大学农学院,湖南 长沙 410128;2.湖南省烟草公司湘西州公司,湖南 吉首 416000;3.湖南省烟草公司张家界市公司,湖南 张家界 427000)

作者简介:

唐韵(1994-),男,湖南张家界人,在读硕士研究生,主要从事烟草生理栽培研究。E-mail:578335248@qq.com。

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基金项目:

基金项目:湖南省烟草公司项目(xx16-18Aa02)。


Temporal and spatial variation of soil pH and its influencing factors in tobacco-growing areas of Longshan county
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Affiliation:

(1.College of Agronomy,Hunan Agricultural University,Changsha Hunan410128;2.Xiangxi Tobacco Companyof Hunan Province,Jishou Hunan416000;3.Zhangjiajie Tobacco Company of Hunan Province,Zhangjiajie Hunan427000)

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    摘要:

    为研究龙山县植烟土壤 pH时空变异特征与其影响因子,分别于 2000与 2015年在龙山烟区采集土壤样品 191和 300个进行土壤 pH与各指标的测定,利用描述性统计、地统计学、相关分析、多重比较、逐步回归与等样本平滑回归对该地区土壤 pH的时空变异与其影响因子进行了研究。结果表明:从描述统计来看 15年间龙山县植烟土壤 pH均值由 6.32变为6.03,降幅为4.64%,极低(<5)的样本增加了19.05%,偏低(5.0~5.5)的样本增加了 1.1%,适宜(5.5~ 7.0)的样本降低了 19.45%;从时空变化来看,pH在 5.0~ 6.0范围的区域大幅增加,6.0~ 7.0范围的区域大幅减少,总体呈酸化趋势,但有小部分区域 pH呈碱化趋势,有两级分化现象。由相关分析与逐步回归分析得出土壤交换性钙、交换性镁为土壤 pH酸化的外在控制因子,有效硫与碱解氮为土壤酸化的外在致酸因子,土壤粘粒为土壤酸化的内在致酸因子,海拔也对 pH有重要影响。

    Abstract:

    In order to study the temporal and spatial variability of soil pH and its influencing factors in tobacco-growing areas of Wuling Mountain and provide reliable basis for the regulation of soil pH in tobacco-growingareas,191 and 300 soil samples were collected from Longshan tobacco-growing areas in 2000 and2015,respectively,for the determination of soil pH and variousindicators. Descriptivestatistics,geostatistics,correlationanalysis,multiple comparisons and gradual regression were used. The temporal and spatial variability of soil pH and its influencing factors in this area were studied by means of regression analysis. The results showed that the average pH of tobacco-growing soils in Longshan county changed from 6.32 to 6.03 in the past 15years,witha decrease of4.64%,an increase of 19.05% in extremelylow(<5),an increase of 1.1% inlow(5.0~5.5),and a decrease of19.45% in suitable(5.5~7.0). From the point of view of temporal and spatialvariations,the range of pH in 5.0~ 6.0 increasedsignificantly,and the range of 6.0~7.0 decreasedsignificantly,which showed a trend of acidification in general. But there was asmall part of the region with a trend ofalkalization,indicating two levels of differentiation. Through correlation analysis and stepwiseregressionanalysis,it was concluded that exchangeable calcium and exchangeable magnesium were the external control factors ofsoil pHacidification,available sulfur and alkali -hydrolyzed nitrogen were the external acidification factors of soilacidification,claywas the internal acidification factor of soilacidification,and elevation also had an important influence on soil pH.

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唐韵,向德明,周清明,田明慧,李强,姚旺,戴曦,黎娟.龙山县植烟土壤 pH时空变异与影响因子研究[J].中国土壤与肥料,2020,(6):100-106.

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  • 收稿日期:2019-09-19
  • 最后修改日期:
  • 录用日期:2020-03-08
  • 在线发布日期: 2021-01-21