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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >The effect of terrain and management on the spatial variability of soil properties in an apple orchard.
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The effect of terrain and management on the spatial variability of soil properties in an apple orchard.

机译：地形和管理对苹果园土壤特性空间变异的影响。

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摘要

Soil variability has implications in farm workability, nutrient and pesticide management, and sustainability. The aims of this study were to investigate how management practises and topography influence the variability of key soil properties and to test the efficacy of various analytical techniques for predictive high resolution soil mapping. We sampled soil properties measured in an intensively managed orchard in the Adelaide Hills, South Australia using a stratified sampling design for alleys and tree-lines in order to distinguish potential management effects (extrinsic factors) from effects of natural soil variability (intrinsic factors). Key soil properties were determined using standard techniques and predictions using mid-infrared partial least-squares (MIR-PLS). Total organic carbon and electrical conductivity (EC) were significantly lower in the tree-line than in the alley. The distribution of coarse fraction (>2 mm) was also very different between tree-line and alley, most likely because of ripping during orchard establishment. Terrain parameters had varying effect on distribution of soil properties. The degree of correlation between soil properties and terrain parameters was influenced by the different management regimes in the alley and the tree-line. Within-field management practises impose marked short-range variability in soil properties. Soil sampling in intensively managed orchards in which there has been major landform modification must be stratified.
机译：土壤多变性对农场的可操作性，养分和农药管理以及可持续性具有影响。这项研究的目的是调查管理实践和地形如何影响关键土壤特性的变异性，并测试各种分析技术对预测性高分辨率土壤制图的有效性。为了对潜在的管理影响（外部因素）与自然土壤变异性（内部因素）进行区分，我们对南澳大利亚州阿德莱德山（Adelaide Hills）的集约化管理果园中的土壤特性进行了采样，采用了针对小巷和林线的分层采样设计。使用标准技术确定土壤的关键特性，并使用中红外偏最小二乘（MIR-PLS）进行预测。林线中的总有机碳和电导率（EC）显着低于小巷。林线和胡同之间的粗颗粒分布（> 2 mm）也有很大差异，这很可能是由于果园建立过程中的撕裂所致。地形参数对土壤性质的分布具有不同的影响。土壤特性和地形参数之间的相关程度受胡同和林线中不同管理制度的影响。田间管理措施在土壤性质上施加了明显的短期变化。必须对集约化果园进行了重大地形改造的土壤取样进行分层。

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