Phosphorus accumulation in cultivated soils from long-term annual applications of cattle feedlot manure

被引:142
作者
Whalen, JK
Chang, C
机构
[1] McGill Univ, St Anne De Bellevue, PQ, Canada
[2] Agr & Agri Food Canada, Res Ctr, Lethbridge, AB, Canada
关键词
D O I
10.2134/jeq2001.301229x
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Historically, manure has been recognized as an excellent soil amendment that can improve soil quality and provide nutrients for crop production. In areas of high animal density, however, the potential for water pollution resulting from improper storage or disposal of manure may be significant. The objective of this study was to determine the P balance of cultivated soils under barley (Hordeum vulgare L,) production that have received long-term annual manure amendments, Nonirrigated soils at the study site in Lethbridge,AB, Canada, have received 0, 30, 60, or 90 Mg manure ha(-1) (wet wt, basis) while irrigated plots received 0, 60, 120, and 180 Mg ha(-1) annually for 16 yr, The amount of P removed in barley grain and straw during the 16-yr period was between 5 and 18% of the cumulative manure P applied. There was a balance between P applied in manure and P recovered in crops and soils (to the 150-cm depth) of nonirrigated plots during the 16-yr study. In irrigated plots, as much as 1.4 Mg P ha(-1) added (180 Mg ha(-1) yr(-1) treatment) was not recovered over 16 yr, and was probably lost through leaching, The risk of ground water contamination with P from manure was greater in irrigated than nonirrigated plots that have received long-term annual manure amendments, Manure application rates should be reduced in nonirrigated and irrigated plots to more closely match manure P inputs to crop P requirements.
引用
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页码:229 / 237
页数:9
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