Carbon accumulation in the roots of grassland /
2023
Toleikienė, Monika, | Arlauskienė, Aušra, | Šarūnaitė, Lina, | Kadžiulienė, Žydrė, | Jamil, Yasha,
The important role of SOC sequestration in grassland could be assigned to the roots of plants. However, root derived C sequestration is investigated much less than total SOC stocks in the soil. In our study, different grassland systems were investigated for biomass output and C accumulation in the roots. According to our investigations, the composition of grasslands significantly affects the biomass of roots in the soil. Results showed that the most productive mixture was red clover with festulolium, which accumulated 8,763 DM kg ha-1. The carbon accumulated in the roots of grassland species mixtures differed from 3,299 to 4,388 kg C ha-1. The highest C amount was found in the roots of red clover and festulolium mixture, at 4,388 kg C ha-1, while for monoculture red clover it was 3,563 kg C ha-1 and for festulolium 3,299 kg C ha-1. Meanwhile, C accumulated in the shoots varied from 2,914 to 5,134 kg C ha-1 and this was mostly removed from the system for livestock. All these data give important reasons to state that species diversification and the choice of the specific species can significantly elevate carbon sequestration in the roots of grasslands and thereby contribute climate change mitigation.
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