VARIATION OF ACID VALUES IN FLOODPLAIN SOILS OF THE AMUR RIVER

Q4 Agricultural and Biological Sciences Biulleten'' Pochvennogo instituta im VV Dokuchaeva Pub Date : 2019-09-15 DOI:10.19047/0136-1694-2019-98-57-76
A. V. Martynov
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Abstract

Understanding the variability of acidic properties in the soil cover of floodplains is of greatest importance as far as it helps to ensure the rational management of floodplain areas, since the pH level is a fundamental indicator that determines the concentration of soluble and available elements for plants. This article provides the results of actual, potential and exchangeable acidity measurements performed in 87 soil profiles located within the upper and middle reaches of the Amur River. Descriptive statistics, correlation and linear regression were used to characterize acidity. It has been established that acidity decreases in the floodplain of the upper and middle reaches of the Amur River in the following direction: alluvial marsh (peat-gley and humus-gley) soils, residually-alluvial (rzhavozems and brunezems) soils, alluvial gray gley soil, alluvial gray humus. The soils of the upper Amur floodplain are more acidic in comparison with the soils of the middle Amur, the average pH KCl values in soils with the same genesis of the former are less by 0.2–0.4 than the ones of the latter. It was revealed that the regression coefficient is indicative of the acid-base functional groups of the soil components which are in charge of soil pH. The coefficient greater than 1 points to the organic nature of acidity; below 1 – to the prevalence of mineral acids.
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阿穆尔河漫滩土壤酸值的变化
了解洪泛平原土壤覆盖层酸性特性的可变性至关重要,因为它有助于确保洪泛平原区域的合理管理,因为pH水平是决定植物可溶性和有效元素浓度的基本指标。本文提供了对位于阿穆尔河中上游的87个土壤剖面进行的实际酸度、潜在酸度和可交换酸度测量的结果。采用描述性统计、相关和线性回归等方法对酸度进行了表征。研究表明,阿穆尔河上中游泛滥平原的酸度下降方向如下:冲积沼泽(泥炭潜育土和腐殖质潜育土)、残余冲积(rzhavozems和brunezems)、冲积灰色潜育土、冲积灰色腐殖质。与中阿穆尔河漫滩的土壤相比,上阿穆尔河泛滥平原的土壤酸性更强,前者成因相同的土壤的平均pH KCl值比后者低0.2–0.4。结果表明,回归系数反映了土壤各组成部分的酸碱官能团对土壤pH值的控制作用。大于1的回归系数表明了酸度的有机性;低于1–矿物酸的普遍性。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
15
审稿时长
8 weeks
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