Short-term legacy effects of feedlot manure amendments on irrigated barley yield and soil macronutrient supply

Canadian journal of soil science

article

J.J. Miller¹  B.W. Beasley¹  E. Bremer²  C.F. Drury¹  F.J. Larney¹  X. Hao¹  D.S. Chanasyk³ 

[1] Agriculture and Agri-Food Canada;804 Central Avenue;Department of Renewable Resources, University of Alberta, General Services Building

关键词: feedlot manure type;    bedding material;    nitrogen;    phosphorus;    potassium;    sulfur.;   

DOI  :  10.1139/cjss-2018-0064

学科分类：农业科学（综合）

来源: NRC Research Press

【 摘 要 】

Limited research exists on short-term legacy effects of land application of different feedlot manures on barley ( Hordeum vulgare L.) yield and soil macronutrient (NO 3 -N, PO 4 -P, K, and SO 4 -S) supply. In a study conducted in southern Alberta, feedlot manures with straw (ST) or wood-chip (WD) bedding were either stockpiled or composted and applied annually to a clay loam soil at 13, 39, and 77 Mg ha −1 dry wt. for 17 yr. Control treatments without any amendments or with inorganic fertilizer were included. In the second and third year (2016–2017) after discontinuing manure applications in 2014, barley silage yield and soil nutrient supply measured in situ with plant root simulator (PRS ® ) probes were determined. No significant ( P  > 0.05) treatment effects occurred on barley yield. Significant treatment effects occurred on soil nutrient supply, but these depended on date and interaction with other treatment factors. Manure rate generally increased soil nutrient supply. Soil NO 3 -N and PO 4 -P supply were 40%–59% lower for composted manure with ST than the other three manure type-bedding treatments, and they were 26%–53% greater for stockpiled than composted manure. This indicated variable manure type effects at different dates. At the two highest rates, soil K supply was 60%–106% greater for ST than WD bedding, and the reverse trend occurred where SO 4 -S supply was 40%–174% greater for WD than ST bedding. Overall, short-term legacy effects of feedlot manure type and bedding were more persistent on soil macronutrient supply than barley silage yield.

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