Cattle manure loadings and legacy effects on copper and zinc availability under rainfed and irrigated conditions

نویسندگان

چکیده

Long-term cattle manure applications build up nutrient pools and can lead to trace element enrichments in soils. The objectives of this study were evaluate copper (Cu) zinc (Zn) loadings the soil during continuous annual determine time required for return its pre-manure available Cu Zn levels after is discontinued. application rates 0, 30, 60, 90 Mg·ha ?1 rainfed 120, 180 (wet weight) irrigated plots. Although was applied 45 yr some plots, terminated one subset treatments 14 another 30 legacy effects 31 15 yr, respectively. Soil samples collected fall 2003, 2008, 2013, 2018 analyzed Zn. Crops grown all years continuously with concentrations measured both silage grains harvested. regression model developed using data suggests long recovery ranging from 10 20 23 41 at 10–24 21–32 under rainfed, could accumulation Zn, creating long-lasting soils increased environmental risk leaching groundwater.

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ژورنال

عنوان ژورنال: Canadian Journal of Soil Science

سال: 2021

ISSN: ['0008-4271', '1918-1841']

DOI: https://doi.org/10.1139/cjss-2020-0124