Long‐term effects of tillage, nutrient application and crop rotation on soil organic matter quality assessed byNMRspectroscopy

• DOI: 10.1111/sum.12198
• Publication Date: 2015-07-31T09:04:32Z
• Authors: B. M. Shrestha; B. R. Singh; C. Forte; G. Certini
• Keywords: Crop Rotation; Soil carbon; Soil Quality; Rotation system

Abstract Crop and land management practices affect both the quality quantity of soil organic matter ( SOM ) hence are driving forces for carbon SOC sequestration. The objective this study was to assess long‐term effects tillage, fertilizer application crop rotation on in an agricultural area southern Norway, where a fertility experiment initiated 1953 second tillage 1983. first comprised 6‐yr rotations with cereals only 2‐yr cereal 4‐yr grass recommended (base) more than (above base) rates; dealt autumn‐ploughed (conventional‐till) plots direct‐drilled (no‐till). Soil samples at 0–10 10–30 cm depths were collected autumn 2009 analysed their C N contents. top layer determined by 13 solid‐state NMR spectroscopy. stock did not differ significantly because or types, even after 56 yr. However, no‐till system showed higher conventional‐till depth 26 yr experiment, but it different depth. In terms quality, found type, rate rotation. abundance O‐alkyl C, while indicated apparently indirect enrichment alkyl suggesting advanced stage decomposition. quantitative qualitative suggest that adopting no‐tillage including farmyard manure may contribute preserve mitigate climate change.