Do grazing systems and species composition affect root biomass and soil organic matter dynamics in temperate grassland swards?
| Autor: | Jeroen C.J. Groot, Evert Jan Bakker, Martin K. van Ittersum, M.J.J. Hoogsteen, Egbert A. Lantinga, Nick van Eekeren, Pablo Tittonell |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Carbon sequestration
010504 meteorology & atmospheric sciences Perennial plant Geography Planning and Development lcsh:TJ807-830 lcsh:Renewable energy sources Grassland species Land-use change Management Monitoring Policy and Law 01 natural sciences Wiskundige en Statistische Methoden - Biometris Grazing Mathematical and Statistical Methods - Biometris lcsh:Environmental sciences 0105 earth and related environmental sciences lcsh:GE1-350 Biomass (ecology) Renewable Energy Sustainability and the Environment Soil organic matter lcsh:Environmental effects of industries and plants Farm Systems Ecology Group 04 agricultural and veterinary sciences PE&RC Manure lcsh:TD194-195 Agronomy Plant Production Systems Loam Plantaardige Productiesystemen Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Monoculture Sampling depth |
| Zdroj: | Sustainability (Switzerland), 12(3) Sustainability, Vol 12, Iss 3, p 1260 (2020) Sustainability Volume 12 Issue 3 Sustainability (Switzerland) 12 (2020) 3 |
| ISSN: | 2071-1050 |
| Popis: | Elevating soil organic matter (SOM) levels through changes in grassland management may contribute to lower greenhouse gas concentrations in the atmosphere and mitigate climate change. SOM dynamics of grassland soils may be affected by grazing systems and plant species composition. We analyzed the effects of simulated grazing systems (continuous (CG), rotational (RG), and lenient strip grazing (LG)) and species composition (monocultures of perennial ryegrass fertilized (LP+) and unfertilized (LP&minus )), tall fescue (fertilized, FA+), and a mixture of these two species with white clover (fertilized, LFT+)) on root biomass and SOM dynamics in field experiments on loamy and sandy soils in the Netherlands. Dried cattle manure was added to all fertilized treatments. We hypothesized that SOM accumulation would be highest under CG and LG, and FA+ and LFT+ as a consequence of greater belowground biomass production. SOM was monitored after conversion from arable land for a period of two years (loamy and sandy soil) and five years (sandy soil). We found that management practices to increase SOM storage were strongly influenced by sampling depth and length of the grassland period. SOM increased significantly in nearly all fertilized treatments in the 0&ndash 60 cm layer. No differences between species compositions were found. However, when only the 30&ndash 60 cm soil layer was considered, significantly higher SOM increases were found under FA+, which is consistent with its greater root biomass than the other species. SOM increases tended to be higher under LG than RG. The results of this study suggest that it seems possible to comply with the 4-thousandth initiative during a period of five years with fertilized perennial ryegrass or tall fescue in monoculture after conversion from arable land. It remains to be investigated to which extent this sequestration of carbon can be maintained after converting grassland back to arable land. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|