Effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil

Abstract The sandy soil leaks water and fertilizer, and the ecological degradation is serious. The structural characteristics of soft rock and sandy soil are complementary, and the improvement of sandy soil by adding soft rock is of great significance to improve soil fertility, restore biodiversity,...

Full description

Bibliographic Details
Main Authors: Wan-ying Li, Zhen Guo, Juan Li, Ji-chang Han
Format: Article
Language:English
Published: Nature Publishing Group 2021-02-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-021-84177-x
id doaj-b8103d55d6434b44842247905f59e685
record_format Article
spelling doaj-b8103d55d6434b44842247905f59e6852021-03-11T12:21:56ZengNature Publishing GroupScientific Reports2045-23222021-02-0111111110.1038/s41598-021-84177-xEffects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soilWan-ying Li0Zhen Guo1Juan Li2Ji-chang Han3College of Land Engineering, Chang’an UniversityShaanxi Provincial Land Engineering Construction Group Co., Ltd.Shaanxi Provincial Land Engineering Construction Group Co., Ltd.College of Land Engineering, Chang’an UniversityAbstract The sandy soil leaks water and fertilizer, and the ecological degradation is serious. The structural characteristics of soft rock and sandy soil are complementary, and the improvement of sandy soil by adding soft rock is of great significance to improve soil fertility, restore biodiversity, and maintain sustainable development of the Mu Us sandy land region. In this study, total organic carbon (TOC), particulate organic carbon (POC), dissolved organic carbon (DOC), easily oxidized organic carbon (ROC), microbial biomass carbon (SMBC), bacterial community structure and crop yield were examined using soft rock:sand volume ratios of 0:1 (CK), 1:5 (C1), 1:2 (C2) and 1:1 (C3). Our results indicated that, compared with the CK treatment, TOC (9.66–22.34%), POC (85.65–120.41%) and ROC (114.12–192.31%) noticeably increased in C1, C2 and C3 treatments; SMBC in treatment C3 increased by 42.77%. The three dominant bacteria in the soil (Proteobacteria, Actinobacteria and Chloroflexi), as well as Proteobacteria abundance, greatly declined in the treatments with the addition of soft rock. Pseudarthrobacter was the dominant Genus in all treatments, having an abundance between 11.83 and 19.33%. Bacterial diversity, richness and evenness indices all recorded an increase under the treatments. POC, TOC and SMBC recorded the most significant effects on the bacterial community structure. The largest increases in wheat and corn yields were recorded in the C2 treatment (16.05% and 16.30%), followed by the C1 treatment (8.28% and 8.20%, respectively). Our findings indicate that a soft rock:sand ratio between 1:5 and 1:2 recorded the most improvement in the sandy soil environment.https://doi.org/10.1038/s41598-021-84177-x
collection DOAJ
language English
format Article
sources DOAJ
author Wan-ying Li
Zhen Guo
Juan Li
Ji-chang Han
spellingShingle Wan-ying Li
Zhen Guo
Juan Li
Ji-chang Han
Effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil
Scientific Reports
author_facet Wan-ying Li
Zhen Guo
Juan Li
Ji-chang Han
author_sort Wan-ying Li
title Effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil
title_short Effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil
title_full Effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil
title_fullStr Effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil
title_full_unstemmed Effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil
title_sort effects of different proportions of soft rock additions on organic carbon pool and bacterial community structure of sandy soil
publisher Nature Publishing Group
series Scientific Reports
issn 2045-2322
publishDate 2021-02-01
description Abstract The sandy soil leaks water and fertilizer, and the ecological degradation is serious. The structural characteristics of soft rock and sandy soil are complementary, and the improvement of sandy soil by adding soft rock is of great significance to improve soil fertility, restore biodiversity, and maintain sustainable development of the Mu Us sandy land region. In this study, total organic carbon (TOC), particulate organic carbon (POC), dissolved organic carbon (DOC), easily oxidized organic carbon (ROC), microbial biomass carbon (SMBC), bacterial community structure and crop yield were examined using soft rock:sand volume ratios of 0:1 (CK), 1:5 (C1), 1:2 (C2) and 1:1 (C3). Our results indicated that, compared with the CK treatment, TOC (9.66–22.34%), POC (85.65–120.41%) and ROC (114.12–192.31%) noticeably increased in C1, C2 and C3 treatments; SMBC in treatment C3 increased by 42.77%. The three dominant bacteria in the soil (Proteobacteria, Actinobacteria and Chloroflexi), as well as Proteobacteria abundance, greatly declined in the treatments with the addition of soft rock. Pseudarthrobacter was the dominant Genus in all treatments, having an abundance between 11.83 and 19.33%. Bacterial diversity, richness and evenness indices all recorded an increase under the treatments. POC, TOC and SMBC recorded the most significant effects on the bacterial community structure. The largest increases in wheat and corn yields were recorded in the C2 treatment (16.05% and 16.30%), followed by the C1 treatment (8.28% and 8.20%, respectively). Our findings indicate that a soft rock:sand ratio between 1:5 and 1:2 recorded the most improvement in the sandy soil environment.
url https://doi.org/10.1038/s41598-021-84177-x
work_keys_str_mv AT wanyingli effectsofdifferentproportionsofsoftrockadditionsonorganiccarbonpoolandbacterialcommunitystructureofsandysoil
AT zhenguo effectsofdifferentproportionsofsoftrockadditionsonorganiccarbonpoolandbacterialcommunitystructureofsandysoil
AT juanli effectsofdifferentproportionsofsoftrockadditionsonorganiccarbonpoolandbacterialcommunitystructureofsandysoil
AT jichanghan effectsofdifferentproportionsofsoftrockadditionsonorganiccarbonpoolandbacterialcommunitystructureofsandysoil
_version_ 1724224396780896256