Abindaw Thomas, Hanyabui Emmanuel, Atiah Kofi, Akwasi Edward Ampofo, Ziblim Imoro Abukari
Department of Soil Science, University of Cape Coast, Cape Coast, Ghana.
Department of Biodiversity, Faculty of Natural Resource, Nyankpala, University for Development Studies, Ghana.
Heliyon. 2023 Feb 28;9(3):e14002. doi: 10.1016/j.heliyon.2023.e14002. eCollection 2023 Mar.
Globally, efforts are being made to identify land use types that could potentially improve carbon sequestration to mitigate climate change and global warming and ensure sustainable agriculture. The study was conducted at the University of Cape Coast Teaching and Research Farm to evaluate the influence of different land use types on the distribution of SOC at different soil depths. A stratified random sampling technique was used to collect a total of 180 soil samples at 0-15 cm, 15-30 cm and 30-45 cm depths from arable, fallow, pasture and plantation fields, covering about 24.52 ha. The physico-chemical properties of the soil samples were determined using standard laboratory methods and the data generated was analysed using Minitab 19. The results showed that land use systems significantly (p ≤ 0.05) affected the distribution of the physico-chemical properties of the soil. The SOC content under the different land use types was in the order; of plantation (2.57%) > arable (1.99%) > pasture (1.55%) > fallow (1.14%). The plantation field significantly (p ≤ 0.05) had higher SOC compared to the other land use types and that could be adopted as a better carbon store that can help in mitigating climate change. The mean values of SOC content and most of the other physico-chemical properties determined were generally concentrated in the topsoil (0-15 cm depth) but decreased with depth, so managing these fields properly can equally improve the availability of these nutrients towards sustainable agriculture.
在全球范围内，人们正在努力确定能够潜在提高碳固存以缓解气候变化和全球变暖并确保可持续农业的土地利用类型。该研究在开普敦大学教学与研究农场进行，以评估不同土地利用类型对不同土壤深度有机碳分布的影响。采用分层随机抽样技术，从耕地、休耕地、牧场和种植园田地中，在0 - 15厘米、15 - 30厘米和30 - 45厘米深度共采集了180个土壤样本，覆盖面积约24.52公顷。使用标准实验室方法测定土壤样本的物理化学性质，并使用Minitab 19对生成的数据进行分析。结果表明，土地利用系统对土壤物理化学性质的分布有显著影响（p≤0.05）。不同土地利用类型下的有机碳含量顺序为：种植园（2.57%）＞耕地（1.99%）＞牧场（1.55%）＞休耕地（1.14%）。与其他土地利用类型相比，种植园田地的有机碳含量显著更高（p≤0.05），可作为更好的碳储存地，有助于缓解气候变化。所测定的有机碳含量平均值和大多数其他物理化学性质通常集中在表土（0 - 15厘米深度），但随深度降低，因此妥善管理这些田地同样可以提高这些养分对可持续农业的有效性。
