Response of soil structure and hydraulic conductivity to reduced tillage and animal manure in a temperate loamy soil - Université de Rennes Access content directly
Journal Articles Soil Use and Management Year : 2013

Response of soil structure and hydraulic conductivity to reduced tillage and animal manure in a temperate loamy soil

Abstract

We studied the combined effects of reduced tillage and animal manure on soil structure and hydraulic conductivity (K) in the 2-10 and 12-20 cm layers in a loamy soil. The study was performed at the end of a 7-yr field trial and included three tillage treatments (mouldboard ploughing until 25 cm depth: MP, shallow tillage until 12 cm depth: ST, no-till: NT) and two fertilizer application treatments (mineral or poultry manure). Soil structure was assessed through bulk density (qb), micromorphological and macropore-space characteristics. K was measured in situ at 0.6, 0.2 and 0.05 kPa. Untilled layers had a vermicular microstructure resulting from earthworm activity, whereas tilled layers displayed a mixture of crumb and channel microstructures. Untilled layers had the highest qb and twice as much lower total macroporosity area (pores > 240 lm in equivalent diameter) than tilled layers, reflected by the smallest area of macropores 310-2000 lm in diameter and the smallest area of large complex macropores. K under untilled layers was 12-62% lower than that under tilled layers, but differences were statistically significant only at 0.05 kPa in the 2-10 cm. No significant interaction between tillage and nutrient application treatments was detected for all properties. Compared with mineral fertilizer, poultry manure resulted in a similar qb but 20% greater total macroporosity area and 30% higher K at 0.2 kPa. Overall, the sensitivity of soil structure and K to poultry manure were relatively small compared with tillage. We suggest that cultivation practices other than animal manure application are needed to improve physical properties under reduced tillage.

Dates and versions

hal-00931695 , version 1 (15-01-2014)

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Nicolas Bottinelli, Safya Menasseri-Aubry, Daniel Cluzeau, Vincent Hallaire. Response of soil structure and hydraulic conductivity to reduced tillage and animal manure in a temperate loamy soil. Soil Use and Management, 2013, 29 (3), pp.401-409. ⟨10.1111/sum.12049⟩. ⟨hal-00931695⟩
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