Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6772886 | Soil and Tillage Research | 2018 | 6 Pages |
Abstract
Subsoils that are compacted, nutrient-poor or low in soil organic matter (SOM) often limit crop growth and yield. Improvement of subsoil conditions by deep loosening is laborious and expensive and its positive effect may not last. This study investigated the effect of deep loosening and injection of slurry made from cereal straw (30â¯Mg dry mass haâ1) at 25-34â¯cm depth on soil properties and crop performance in a Swedish field experiment that started in autumn 2015 and monitored soil and crop properties during 2016. Looseningâ¯+â¯straw incorporation into subsoil resulted in significantly higher soil organic carbon (SOC) content, potential plant-available water and porosity and lower bulk density (BD) in spring 2016 compared with the control. In autumn 2016, penetrometer resistance (PR) and BD were both significantly lower and SOC and porosity were significantly higher in the looseningâ¯+â¯straw treatment compared with the control and loosening only (29-34â¯cm). Furthermore, BD was significantly lower in the looseningâ¯+â¯straw treated subsoil than in the top soil layer of the control (0-10â¯cm). Observations indicated that more continuous pores were found in the looseningâ¯+â¯straw treatment than in other treatments. Roots and soil faunas were found more frequently where straw was incorporated. Grain yield increased by 5.6% due to looseningâ¯+â¯straw addition (Pâ¯=â¯0.03) and by 4% due to loosening only (Pâ¯=â¯0.06). These results indicate that looseningâ¯+â¯straw input into upper subsoil had a positive short-term influence on soil physical properties, potential plant-available water and grain yield. Straw addition prolonged the positive effect of loosening.
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
Gizachew Tarekegn Getahun, Thomas Kätterer, Lars Juhl Munkholm, Mohammed Masud Parvage, Thomas Keller, Katrin Rychel, Holger Kirchmann,