Three dimensional characteristics of biopores and non-biopores in the subsoil respond differently to land use and fertilization

Zhongbin Zhang, Kailou Liu, Hu Zhou, Hangsheng Lin, Daming Li, Xinhua Peng

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)453-467
Number of pages15
JournalPlant and Soil
Volume428
Issue number1-2
DOIs
StatePublished - Jul 1 2018

Fingerprint

subsoil
land use
paddies
highlands
macropores
macropore
methodology
fertilizers
soil
tortuosity
NPK fertilizers
ecological function
chemical control
computed tomography
porosity
tomography
connectivity
manure
surface area
X-radiation

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Plant Science

Cite this

Zhang, Zhongbin ; Liu, Kailou ; Zhou, Hu ; Lin, Hangsheng ; Li, Daming ; Peng, Xinhua. / Three dimensional characteristics of biopores and non-biopores in the subsoil respond differently to land use and fertilization. In: Plant and Soil. 2018 ; Vol. 428, No. 1-2. pp. 453-467.
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abstract = "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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Three dimensional characteristics of biopores and non-biopores in the subsoil respond differently to land use and fertilization. / Zhang, Zhongbin; Liu, Kailou; Zhou, Hu; Lin, Hangsheng; Li, Daming; Peng, Xinhua.

In: Plant and Soil, Vol. 428, No. 1-2, 01.07.2018, p. 453-467.

Research output: Contribution to journalArticle

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, Hangsheng

AU - Li, Daming

AU - Peng, Xinhua

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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