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首页> 外文期刊>Journal of Agricultural Science >Soil Structure and Porous System in Response to Plant Components of an Agrosilvopastoral System
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Soil Structure and Porous System in Response to Plant Components of an Agrosilvopastoral System

机译：农田农牧系统对土壤结构和多孔系统的响应

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Production systems of agroecological nature, such as agrosilvopastoral systems, have been considered as beneficial in various regions of the world. In semi-arid regions, these systems can contribute not only to food production, but also to soil conservation. Considering the specificities of each plant component, it is supposed that there is a different influence on soil structure, so that some components can be more efficient than others in the improvement of this structure. In the present study, the objective was to evaluate physical attributes with emphasis on the pore distribution, shape and size of a Luvisol in the influence area of different plant components of an agrosilvopastoral system in the semi-arid region of the Ceará state. The study was carried out in an agrosilvopastoral system established in the municipality of Sobral (Ceará, Brazil), with a completely randomized strip-plot design and four replicates. The treatments corresponded to three plant components: arbustive (Leucaena leucocephala), arboreal (Poincianella pyramidalis) and agricultural (Zea mays); and four soil layers: 0.0-0.05, 0.05-0.18, 0.18-0.25 and 0.025-0.41 m. For physical and micromorphometric analyses, undisturbed soil samples were collected in profiles in the areas covered by the plant components. The following attributes were analyzed: soil density, soil-air intrinsic permeability, soil-water characteristic curve, total porosity and pore distribution by shape and size. The soil under the influence of the components L. leucocephala and P. pyramidalis showed better structure, represented by the lower values of density, higher intrinsic permeability to the air and larger total area of pores, in comparison to the soil under the influence of Zea mays. The unfavorable result of the annual crop is due not only to the plant component, but also to the grazing of crop residues in the management system.
机译：农业生态性质的生产系统，例如农林牧系统，在世界各地被认为是有益的。在半干旱地区，这些系统不仅可以促进粮食生产，而且可以促进土壤保护。考虑到每种植物成分的特殊性，认为对土壤结构的影响不同，因此某些成分在改善土壤结构方面可能比其他成分更有效。在本研究中，目标是评估物理属性，重点是在塞阿拉州半干旱地区的农银牧草系统的不同植物成分的影响区域中卢维索的孔分布，形状和大小。这项研究是在Sobral市（巴西塞阿拉市）建立的农林牧系统中进行的，采用完全随机的条形图设计和四次重复。这些处理对应于三个植物成分：丛生（Leucaena leucocephala），乔木（Poincianella pyramidalis）和农业（Zea mays）;和四个土层：0.0-0.05、0.05-0.18、0.18-0.25和0.025-0.41 m。为了进行物理形态和微观形态分析，将未受干扰的土壤样品收集在植物成分覆盖区域的剖面中。分析了以下属性：土壤密度，土壤-空气固有渗透率，土壤-水特征曲线，总孔隙度和按形状和大小分布的孔隙。与玉米（Zea）影响下的土壤相比，受白头粉刺（L. leucocephala）和金字塔果（P. pyramidalis）影响的土壤表现出更好的结构，表现为较低的密度值，较高的空气固有渗透率和较大的毛孔总面积。可能。一年生作物的不利结果不仅是由于植物组成，而且还因为管理系统中的农作物残渣放牧。

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