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首页> 外文期刊>Agriculture, Ecosystems & Environment: An International Journal for Scientific Research on the Relationship of Agriculture and Food Production to the Biosphere >Canadian agri-environmental indicators related to land quality:integrating census and biophysical data to estimate soil cover, winderosion and soil salinity
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Canadian agri-environmental indicators related to land quality:integrating census and biophysical data to estimate soil cover, winderosion and soil salinity

机译：与土地质量有关的加拿大农业环境指标：结合人口普查和生物物理数据来估算土壤覆盖率，风蚀和土壤盐分

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摘要

A Canadian initiative to define and estimate indicators of the relationship between agricultural activities and environmental quality has been under way since 1993. This paper focuses on those indicators related to land quality and highlights the use of GIS to reconfigure land use and climatic data to a soil landscape spatial model in order to apply models of soil degradation. The 1981 and 1991 Census of agriculture data from a cadastral base and climatic indices from iso-contour maps are related to the soil landscapes of Canada to identify trends in the amount of soil cover, the risk of soil erosion by wind and the risk of soil salinization. Results indicate that soil cover has improved by about 11% through the use of conservation tillage and crop residue management and reduced summerfallowing, and that the risk of wind erosion in the prairies has decreased by 7% in the 10 years. The risk of soil salinization has remained constant on 93% of cropland, decreased on 7% and increased on <1%. It appears that the improvements in soil quality protection have occurred despite some shifts to more intensive cropping systems. Crown Copyright (C) 2000 Published by Elsevier Science B.V. All rights reserved.
机译：自1993年以来，加拿大一直在制定和评估农业活动与环境质量之间的关系的指标。本文着重于与土地质量相关的指标，并着重介绍了使用GIS重新配置土壤的土地利用和气候数据的方法。景观空间模型，以应用土壤退化模型。 1981年和1991年来自地籍基础的农业普查数据以及等值线图的气候指数与加拿大的土壤景观有关，以识别土壤覆盖量，风蚀土壤和土壤风险的趋势。盐渍化。结果表明，通过使用保护性耕作和作物残茬管理以及减少夏季休耕，土壤覆盖率提高了约11％，并且在10年中，大草原的风蚀风险降低了7％。土壤盐渍化的风险在93％的耕地上保持不变，在7％上降低，在<1％上增加。尽管向更为集约化的耕作制度转移了一些，但似乎在土壤质量保护方面已有所改善。 Crown版权（C）2000，由Elsevier Science B.V.保留所有权利。

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