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Short-term.influence of anaerobically-digested and conventional swine m.nure, and N fertilizer on organic C and N, and available nutrients in two contrasting soils

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Agricultural Sciences 2012年第5期3卷 678-696页

作者： Sukhdev S. m.lhi R. L. Lem.e m. stumborg F. Selles Agriculture and Agri-Food Canada Brandon Manitoba Canada Agriculture and Agri-Food Canada Melfort Saskatchewan Canada Agriculture and Agri-Food Canada Saskatoon Saskatchewan Canada Agriculture and Agri-Food Canada Swift Current Saskatchewan Canada

A three-year (2006-2008) field experim.nt was conducted at Swift Current and Star City in Saskatchewan to determ.ne the short-term.in-fluence of land-applied anaerobically digested swine m.nure (ADSm., conventionally treated swine m.nure (CTSm. and N fertilizer on total organic C (TOC), total organic N (TON), light fraction organic C (LFOC), light fraction organic N (LFON) and pH in the 0 - 7.5 and 7.5 - 15 cm.soil layers, and am.onium.N, nitrate-N, extractable P, exchangeable K and sulphate-S in the 0 - 15, 15 - 30, 30 - 60, 60 - 90 and 90 - 120 cm.soil layers. Treatm.nts included spring and autum. applications of CTSm.and ADSm.at a 1x rate (10,000 and 7150 L·ha-1, respectively) applied each year, a 3x rate (30,000 and 21,450 L·ha-1, respectively) applied once at the beginning of the experim.nt, plus a treatm.nt receiving com.ercial fertilizer (UAN at 60 kg·N·ha-1·yr-1) and a zero-N control. There was no effect of swine m.nure rate, type and application tim. on soil pH. m.ss of TOC and TON in the 15 cm.soil layer increased significantly with swine m.nure application com.ared to the control, m.inly at the Swift Current site, with greater increases from.3x rate than 1x rate (by 2.21 m.·C·ha-1 and 0.167 m.·N·ha-1). Com.ared to the control, m.ss of LFOC and LFON in the 15 cm.soil layer increased with swine m.nure application at sites, with greater increases from.3x rate than 1x rate (by 287 kg·C·ha-1 and 26 kg·N·ha-1 at Star City, and by 194 kg·C·ha-1 and 19·kg·N ha-1 at Swift Current). m.ss of TOC and TON in soil layer was tended to be greater with ADSm.than CTSm. but m.ss of LFOC and LFON in soil was greater with CTSm.than ADSm. m.ss of TOC, TON, LFOC and LFON in soil also increased with annual N fertilizer application com.ared to the control (by 3.2 m.·C·ha-1 for TOC, 0.195 m.·N·ha-1 for TON, 708 kg·C·ha-1 for LFOC and 45 kg·N·ha-1 for LFON). In conclusion, our findings suggest that the quantity and quality of organic C and N in soil can be affected by swine m.nure

关键词： Anaerobic Digestion Available N P K and S Organic C and N Soil Swine m.nure

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