TY - JOUR
T1 - Three dimensional characteristics of biopores and non-biopores in the subsoil respond differently to land use and fertilization
AU - Zhang, Zhongbin
AU - Liu, Kailou
AU - Zhou, Hu
AU - Lin, Henry
AU - Li, Daming
AU - Peng, Xinhua
N1 - Funding Information:
Acknowledgements This National Natural Science Foundation of China (NSFC 41401245, 41771264 and 41571130053), Innovation Program of the Institute of Soil Science CAS, China (No. ISSASIP1610) and State Key Laboratory of Soil and Sustainable Agriculture (Y20160012) provided financial support for this study. Xinhua Peng is grateful to the National Science Foundation for Distinguished Young Scholars (41725004). The authors thank the staff at Jiangxi Institute of Red Soil who conducted and maintained the two long-term field experiments.
Funding Information:
This National Natural Science Foundation of China (NSFC 41401245, 41771264 and 41571130053), Innovation Program of the Institute of Soil Science CAS, China (No. ISSASIP1610) and State Key Laboratory of Soil and Sustainable Agriculture (Y20160012) provided financial support for this study. Xinhua Peng is grateful to the National Science Foundation for Distinguished Young Scholars (41725004). The authors thank the staff at Jiangxi Institute of Red Soil who conducted and maintained the two long-term field experiments.
Publisher Copyright:
© 2018, Springer International Publishing AG, part of Springer Nature.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - Background and aims: Soil macropores consist of biopores and non-biopores, which are different in morphological features and ecological functions. We aimed to separate biopores and non-biopores and investigate the response of their three-dimensional (3D) characteristics to land use and fertilization. Methods: Intact soil cores sampled from the subsoil (20–30 cm) under a combination of two land uses, paddy and upland fields, and three fertilization treatments, no fertilizer (Control), chemical fertilizer (NPK), and chemical fertilizer plus organic manure (NPKM), were scanned with X-ray computed tomography (CT). A methodology was proposed to separate biopores and non-biopores and the 3D characteristics of the pores were quantified. Results: Based on the proposed methodology, soil biopores were well isolated from non-biopores. The volume of the biopores contributed 30.1–58.0% and 66.3–74.1% of the volume of the total macropores in the upland and paddy subsoils, respectively. The biopores in the paddy subsoil had a lower mean pore volume (MPV) and mean branch number (MBN), but a larger branch angle than those of the biopores found in the upland subsoil. The porosity, MPV, surface area (SA) and connectivity of non-biopores were significantly higher in the upland subsoil than those in the paddy subsoil. The NPKM treatment significantly increased the volume of the large-sized biopores in the upland subsoil and the tortuosity of the biopores in the paddy subsoil, whereas the fertilization effect on non-biopores was minor. Conclusions: Our results demonstrate that subsoil biopores and non-biopores can be effectively distinguished according to the proposed methodology and that their 3D characteristics respond differently to land use and fertilization.
AB - Background and aims: Soil macropores consist of biopores and non-biopores, which are different in morphological features and ecological functions. We aimed to separate biopores and non-biopores and investigate the response of their three-dimensional (3D) characteristics to land use and fertilization. Methods: Intact soil cores sampled from the subsoil (20–30 cm) under a combination of two land uses, paddy and upland fields, and three fertilization treatments, no fertilizer (Control), chemical fertilizer (NPK), and chemical fertilizer plus organic manure (NPKM), were scanned with X-ray computed tomography (CT). A methodology was proposed to separate biopores and non-biopores and the 3D characteristics of the pores were quantified. Results: Based on the proposed methodology, soil biopores were well isolated from non-biopores. The volume of the biopores contributed 30.1–58.0% and 66.3–74.1% of the volume of the total macropores in the upland and paddy subsoils, respectively. The biopores in the paddy subsoil had a lower mean pore volume (MPV) and mean branch number (MBN), but a larger branch angle than those of the biopores found in the upland subsoil. The porosity, MPV, surface area (SA) and connectivity of non-biopores were significantly higher in the upland subsoil than those in the paddy subsoil. The NPKM treatment significantly increased the volume of the large-sized biopores in the upland subsoil and the tortuosity of the biopores in the paddy subsoil, whereas the fertilization effect on non-biopores was minor. Conclusions: Our results demonstrate that subsoil biopores and non-biopores can be effectively distinguished according to the proposed methodology and that their 3D characteristics respond differently to land use and fertilization.
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U2 - 10.1007/s11104-018-3689-3
DO - 10.1007/s11104-018-3689-3
M3 - Article
AN - SCOPUS:85047482091
SN - 0032-079X
VL - 428
SP - 453
EP - 467
JO - Plant and Soil
JF - Plant and Soil
IS - 1-2
ER -