Organic Carbon and Formation of Soil Aggregates on Areas of Natural Vegetation Converted to Pasture in Southern Amazonas

IF 1.4 4区 农林科学 Q4 SOIL SCIENCE Eurasian Soil Science Pub Date : 2024-04-10 DOI:10.1134/s1064229323603281
R. G. de Almeida, M. C. C. Campos, D. M. P. da Silva, R. V. dos Santos, A. F. L. de Lima, R. F. da Silva Souza, F. A. Bezerra, W. O. Araújo, F. P. de Oliveira
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Abstract

The objective was, therefore, to evaluate the impact on organic carbon and the formation of soil aggregates in areas of natural vegetation converted into pastures in southern Amazonas. The research was carried out in seven areas in the municipality of Humaitá, Amazonas, Brazil, five of which were pastureland, one native forest, and one natural field. Soil samples were collected at depths of 0–10 and 10–20 cm in the seven study areas and analyzed for aggregate stability, soil density, soil organic carbon, and the calculated soil organic carbon stock. Univariate, bivariate, and multivariate analyses were then carried out. Conversion from forest to pasture had a negative impact on percentage of aggregates >2 mm, soil density, concentration and stock of soil organic carbon. Organic carbon correlates positively with percentage of aggregates >2 mm, geometric mean diameter and weighted mean diameter, and negatively with soil density. Aggregate stability influences carbon sequestration in the pasture and forest areas studied, but has no influence in the natural grassland environment.

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亚马孙南部天然植被转为牧场地区的有机碳和土壤团聚体的形成
摘要 因此,研究的目的是评估亚马孙南部天然植被改建成牧场的地区对有机碳和土壤团聚体形成的影响。研究在巴西亚马孙州胡迈塔市的七个地区进行,其中五个是牧场,一个是原始森林,一个是自然田野。研究人员在七个研究区域的 0-10 厘米和 10-20 厘米深处采集了土壤样本,并对土壤的团聚稳定性、土壤密度、土壤有机碳和计算得出的土壤有机碳储量进行了分析。然后进行单变量、双变量和多变量分析。从森林到牧场的转换对 2 毫米的团聚体百分比、土壤密度、土壤有机碳浓度和存量有负面影响。有机碳与 2 毫米聚集体百分比、几何平均直径和加权平均直径呈正相关,与土壤密度呈负相关。在所研究的牧场和森林地区,集料稳定性会影响碳固存,但在天然草地环境中则没有影响。
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来源期刊
Eurasian Soil Science
Eurasian Soil Science 农林科学-土壤科学
CiteScore
2.70
自引率
35.70%
发文量
137
审稿时长
12-24 weeks
期刊介绍: Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.
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