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首页> 外文会议>World Congress of Soil Science >Infillings in irrigated soils cultivated with annual and perennial crops in the Apodi Plateau, Northeastern Brazil
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Infillings in irrigated soils cultivated with annual and perennial crops in the Apodi Plateau, Northeastern Brazil

机译：灌溉土壤中的灌溉土壤植物，在巴西东北部的年度和多年生庄稼栽培

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Irrigated agroecosystems have some particularities that reflect on the nutrient cycling and energy fluxes differently from non irrigated areas and the efficient and rational use of these areas is highly recommended, but generally do not occur. Withinthis context, the aim of this work was to evaluate the consequences of the irrational use of irrigated systems under different conditions of soils, cropping, and management. We studied micromorphological properties of calcareous soils, using microanalysis techniques for different situations of management in an irrigated area located in the Apodi Plateau, state of Ceara, Brazil. We selected four cultivated areas and their respective native vegetation areas. The selection criteria considered the time of use, cropping regime (annual=corn and beans in succession and perennial=bananas, grass and guava) and irrigation systems (microsprinkler or central pivot). Soil blocks (5 X 10 cm) were collected from 5-15, 15-25 and 25-35 cm layers and pedological features at optical and electronic microscope level observed using SEM-EDS. It was possible to associate the frequency and types of infillings with the soil management, with a tendency for the frequency to be higher for the cultivated area, except for Gr. Generally, for cultivated sites the types are between dense complete (DC) and dense incomplete (DI), with voids in the CB area, and in natural situations loose continuous (LC) or loose discontinuous (LD) fabrics. The SEM mapping and EDS data showed infillingsvoids and a greater proportion of quartz grains occupying the voids with a composition similar to the matrix. Grains of iron oxide appeared in the infilling probably due to the weathering of calcareous rocks. It is possible that a natural susceptibilityto infilling formation in the soils studied associated with their genesis, management and irrigation, intensifying the frequency and types of infilling. Certainly other physical properties related to water movement and root development will be compromised.
机译：灌溉农业系统具有一些特殊性，这些特殊性反映了与非灌溉区域不同的营养循环和能量通量，强烈推荐使用这些区域的有效和合理使用，但通常不会发生这种情况。凭借他的上下文，这项工作的目的是评估灌溉系统在不同条件下的非理性使用的后果，种植和管理。我们研究了钙质土壤的微观性特性，使用微量分析技术在位于灌溉区域的不同管理情况下，位于Apodi Plateau，巴西Ceara状态。我们选择了四个耕地和各自的本地植被区。选择标准考虑了使用时间，裁剪制度（连续=玉米和豆类连续=香蕉，草和番石榴）和灌溉系统（MicroSprinkler或Central Pivot）。通过5-15,5-25和25-35cm层收集土壤块（5×10cm），并在使用SEM-EDS观察到的光学和电子显微镜水平处的小学特征。除GR外，有可能将缺陷的频率和类型与土壤管理联系起来，耕种面积更高。通常，对于培养场所，类型在致密完全（DC）和密集的不完全（DI）之间，在CB区域中具有空隙，并且在天然局势中松动连续（LC）或松散的不连续（LD）织物。 SEM映射和EDS数据显示infillingsvoids和更大比例的石英粒占用与基质类似的组合物的空隙。氧化铁颗粒出现在infilling中可能是由于钙质岩石的风化。在与其创世纪，管理和灌溉相关的土壤中填充土壤中缺陷的自然易感性可能是，加剧infilling的频率和类型。当然，与水运动和根系发展有关的其他物理性质将受到损害。

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