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Physical soil quality indicators for environmental assessment and agricultural potential of Oxisols under different land uses in the Araripe Plateau, Brazil
Soil and Tillage Research ( IF 6.5 ) Pub Date : 2021-02-05 , DOI: 10.1016/j.still.2021.104951
Douglas Monteiro Cavalcante , Ana Paula Fonseca e Silva , Brivaldo Gomes de Almeida , Fernando José Freire , Talmo Henrique dos Santos Silva , Fagna Maria Silva Cavalcante

In the Araripe Gypsum District (AGD), Brazil, there is concern that forest degradation processes that have occurred in the region have affected the soils currently in use. This stimulated interest in comparing soil quality to evaluate environmental and production sustainability in native species, eucalyptus forest and food plant production. The present study aimed to develop a soil quality index (SQI) for physical indicators of Oxisols under different land uses associated with the AGD. Four sites were selected: Preserved Caatinga (PC), Degraded Caatinga (DC), Eucalyptus (EUCA) and Cassava monoculture (CAS), evaluated in 0−10 cm and 10−20 cm soil depths. Twenty physical soil attributes obtained from the evaluated areas were submitted to Lilliefors normality test, double-variance analysis, multicollinearity test and principal component analysis (PCA) to select appropriate indicators and as a method for extracting weighting factors. The results showed that 84 % and 79 % of the total variance were explained by two principal components (PCs) at 0−10 and 10−20 cm depths, respectively. The attributes that made up the SQI in 0−10 and 10−20 cm depths were: bulk density (BD), macroporosity (Macro), mesoporosity (Meso), structural-biological microporosity (MicroSB), textural microporosity (MicroT), saturated hydraulic conductivity (KS), soil penetration resistance (PR; 60 and 333 hPa); total porosity (TP), Meso, stable aggregates index (SAIW), KS, PR10, PR800 and PR3000, respectively. Among the management systems, the best SQI scores were in 0−10 cm (PC: 0.85 ± 0.01) and 10−20 cm (EUCA: 0.93 ± 0.01) depths. BD and TP were considered the main parameters of soil quality, as well as Meso and KS, as they are present in the SQI at both depths and perform functions essential to the development of plant species. Results for the AGD suggest that the eucalyptus cultivation system can be implemented to supply energetic needs of calcinators in the AGD, representing an environmentally viable alternative. However, results strongly suggest that the Caatinga preservation still reflects the best soil quality.



中文翻译:

巴西Araripe高原不同土地利用方式下土壤物理质量指标,用于环境评估和烟气的农业潜力

在巴西的Araripe石膏区(AGD),人们担心该地区发生的森林退化过程已影响到目前使用的土壤。这激发了人们对比较土壤质量以评估本地物种,桉树林和食用植物生产的环境和生产可持续性的兴趣。本研究旨在开发土壤质量指数(SQI),作为与AGD相关的不同土地利用下的气溶胶物理指标。选择了四个地点:防腐的卡廷加(PC),退化的卡廷加(DC),桉树(EUCA)和木薯单作(CAS),在0-10 cm和10-20 cm的土壤深度中进行了评估。从评估区域获得的20种物理土壤属性已提交Lilliefors正态性检验,双方差分析,多重共线性测试和主成分分析(PCA)以选择合适的指标,并作为提取权重因子的方法。结果表明,总方差的84%和79%分别由0-10和10-20 cm深度处的两个主成分(PC)解释。构成0-10和10-20厘米深度中的SQI的属性是:堆密度(BD),大孔(宏),中孔(Meso),结构生物学微孔(MicroSB),质地微孔(MicroT),饱和导水率(KS),耐土壤渗透性(PR; 60和333 hPa); 总孔隙率(TP),内消旋稳定聚集体指数(SAI w ^),K小号分别PR10,PR800和PR3000。在管理系统中,最好的SQI得分在0-10厘米(PC:0.85±0.01)和10-20厘米(EUCA:0.93±0.01)深度。BD和TP以及Meso和K S被认为是土壤质量的主要参数。,因为它们在两个深度都存在于SQI中,并发挥了植物物种发展所必需的功能。AGD的结果表明,可以实施桉树栽培系统来满足AGD中煅烧炉的能量需求,这是一种在环境上可行的选择。然而,结果强烈表明,Caatinga的保存仍然反映了最佳的土壤质量。

更新日期:2021-02-05
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