A salinity risk index for soils of the Canadian Prairies

被引：2

作者：

Eilers R.G. ^{[1
]}

Eilers W.D. ^{[2
]}

Fitzgerald M.M. ^{[3
]}

机构：

[1] Manitoba Land Resource Unit, Research Branch, University of Manitoba, Winnipeg

[2] Saskatchewan Land Resource Unit, Research Branch, University of Saskatchewan, Saskatoon, Sask., S7N 5A8

[3] Department Soil Science, Ellis Building, University of Manitoba, Winnipeg, Man.

来源：

Hydrogeology Journal | 1997年 / 5卷 / 1期

关键词：

Como; Risk Index; Agricultural Policy; Risk Class; Farm Land;

D O I：

10.1007/s100400050118

中图分类号：

学科分类号：

摘要：

Agricultural land use can impact the sustainability of inherent soil quality by its influence on the extent, severity, and dynamics of soil salinity. To assess this impact, a salinity risk index was developed and applied to the agricultural region of the Canadian prairies, utilizing land-use data sets for 1981 and 1991. The analysis is presented in map form. The total extent of moderate or more severe salinity for the prairie region, as determined from a summation of each provincial map, is 1.4 million hectares. The risk assessment based on 1991 land-use data indicates that 62.2 percent of the farm land has little to no risk of a change in salinity, 27.9 percent has a moderate risk, and 9.9 percent of the land has a high risk. A comparison of the risk index classes for the 1981 and 1991 land-use data indicates that risk of salinity for the majority of the land (92 percent) had not changed, whereas less than 7 percent of the land had a lower risk class, and approximately 0.5 percent had a higher risk class in 1991. This approach could be utilized periodically to track the impacts of changes in land and thus serve as an indicator of agri-environmental sustainability. This information could be applied by upper levels of government to develop programs and to define agricultural policy.

引用

页码：68 / 79

页数：11

共 18 条

[11] Eilers W.D., Coote D.R., Preliminary Soil Salinity Map, (1988)
[12] Day J.H., The Canada Soil Information System (CanSIS), Manual for describing soils in the field, Technical Report: Working Group on Soil Survey Data, (1982)
[13] Huffman T., Unrau E., Socioeconomic farm data and the soil landscapes of Canada, PARI Factbook: Bring Conservation Technology to the Farm: Lethbridge, Alberta, pp. 149-151, (1995)
[14] McRae T., Description of Indicators and Project Activities and Outputs to 1998: Ottawa, (1995)
[15] McRae T., Hillary N., MacGregor R.J., Smith C.A.S., Design and development of environmental indicators with reference to Canadian Agriculture, North American Workshop on Monitoring for Ecological Assessment of Terrestrial and Aquatic Ecosystems, 1st, (1995)
[16] Pettapiece W.W., Eilers R.G., Soil Salinity-Alberta: Ottawa, (1990)
[17] Pettapiece W.W., Land suitability rating system for agricultural crops: 1. Spring-seeded small grains: Ottawa, Technical Bulletin 1995-6E, (1995)
[18] Stolte W.J., Barbour S.L., Eilers R.G., Mechanisms influencing salinity development around prairie sloughs, Transactions of American Society of Agricultural Engineers, 35, 3, pp. 795-800, (1992)

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