Effects of organic fertilizer addition on dissolved organic carbon in coastal saline soils

doi:10.12302/j.issn.1000-2006.202012010

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (1): 15-24.doi: 10.12302/j.issn.1000-2006.202012010

Special Issue: "双碳”视域下的土壤碳

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Effects of organic fertilizer addition on dissolved organic carbon in coastal saline soils

FAN Zhixin(), WANG Genmei^*(), ZHANG Huanchao, CHEN Jie

Co-Innovation Center for the Sustainable Forestry in Southern China, College of Forestry,Nanjing Forestry University, Nanjing 210037, China

Received:2020-12-04 Accepted:2021-04-15 Online:2022-01-30 Published:2022-02-09
Contact: WANG Genmei E-mail:fanzhixin_fzx@163.com;wanggenmei@njfu.edu.cn

Abstract

Abstract:

【Objective】 To establish a theoretical basis to improve coastal saline soil and its carbon sink function, this study investigated the effects of organic fertilizer on the dissolved organic carbon (DOC) content and component sources in coastal saline soil, alongside the stability of the soil carbon pool. 【Method】 Two types of saline soil with differing salinities (i.e., high and low salt content) in the Jiangsu coastal area, China, were selected to explore changes in soil DOC content and its ultraviolet-visible (UV-Vis) spectrum and three-dimensional (3D) fluorescence spectrum by UV-Vis spectroscopy and 3D fluorescence spectroscopy. This was carried out alongside parallel factor analysis following the addition of organic cow manure fertilizer.【Result】 The results showed that the DOC content and degree of DOC humification for soils treated with organic cow manure fertilizer increased significantly(P<0.05), compared with the control treated with no organic cow manure fertilizer. The extent of DOC humification in the soil samples collected on days 15 and 60 following the addition of cow manure from the high-salt soil was obvious higher than its low-salt counterpart. The DOC in soil was mainly sourced from the addition of organic cow manure fertilizer; following this, the 3D fluorescence spectrum showed that the DOC fulvic acid peak was clearer. The parallel factor analysis identified four fluorescence components in the soil DOC: (1) C1 was the exogenous short-wave humic-like component (including UV region fulvic-like acid and marine fulvic-like acid); (2) C2 was the exogenous humic-like component (including UV region fulvic-like acid and visible region fulvic-like acid); (3) C3 was the endogenous protein-like component (including tryosine-like acid and tryptophan-like acid); (4) C4 was the endogenous protein-like component (only tryptophan-like acid). The proportion of each component in the soil DOC varied with time. 【Conclusion】 This study demonstrated that the addition of organic cow manure fertilizer to coastal saline soil increased the degree of DOC humification and the proportion of humic-like components in soil, while it significantly reduced the proportion of ammonia-like components (P<0.05). This indicates that the organic cow manure fertilizer is conducive to the stability of the active carbon pool in saline soil. However, as many factors affect soil DOC, the effects of organic cow manure fertilizer on soil DOC may different in other areas.

Key words: organic fertilizer, coastal saline soil, dissolved organic carbon, ultraviolet-visible (UV-Vis) spectrum, three-dimensional (3D) fluorescence spectrum, parallel factor analysis

CLC Number:

S714

FAN Zhixin, WANG Genmei, ZHANG Huanchao, CHEN Jie. Effects of organic fertilizer addition on dissolved organic carbon in coastal saline soils[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2022, 46(1): 15-24.

Figures/Tables 7

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Effects of organic fertilizer addition on dissolved organic carbon in coastal saline soils

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[1]	LIAO Yining, GUO Sujuan, WANG Fangfang, MA Yali, LIU Yabin. Effects of combined application of organic and inorganic fertilizers on soil fertility and root functional traits in chestnut orchards [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(5): 84-92.
[2]	YANG Ruizhen, ZHANG Huanchao, HU Lihuang, FAN Zhixin. Effects of AMF inoculation and nitrogen application on nitrogen mineralization of coastal saline soil [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(2): 145-153.
[3]	WANG Aibin, SONG Huifang, ZHANG Liuyang, ZHANG Ming, YANG Shiwen, ZHANG Lingyun. Effects of bio-organic and microbial fertilizers on growth and soil nutrients of Vaccinium spp. seedlings [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(6): 63-70.
[4]	XU Menglu, WU Wei, YAN Zhengming, CAO Guohua, SHEN Caiqin, RUAN Honghua. Content and vertical distribution of soil labile organic carbons in different land use types in the tidal flat area [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(4): 167-175.
[5]	FAN Hongwang, BUI Van Thang, TAO Xiao, GUAN Zhiwei, XU Kefu. Effects of spatial difference between urban and rural areas on soil active organic carbon in Quercus acutissima forests [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(4): 151-158.
[6]	PU Huimei, WANG Genmei. Mechanism of dissolved organic carbon adsorption in soils under different poplar plantation management patterns [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2019, 43(02): 55-63.
[7]	LI Yuanyuan, XU Ziqian, XU Hanmei, CHEN Yueqin, RUAN Honghua. Review of the effect of fertilizer application on the soil fauna in soil ecosystems [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2018, 42(05): 179-184.
[8]	XU Yiqian, XUE Jianhui, WU Yongbo, BU Xiaoli. Effects of rice husk biochar application on nitrogen and phosphorus leaching and microbial biomass carbon and nitrogen content in yellow brown soil [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2017, 41(03): 22-28.
[9]	HE Dongmei, WANG Lei, FENG Yuqing, RUAN Honghua. Effects of land use type on soil dissolved organic carbon in a land reclamation area from lake [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2016, 40(06): 15-19.
[10]	GE Zhiwei, PENG Sai, XU Kai, XU Yu, YU Shuiqiang, RUAN Honghua, XU Changbai, CAO Guohua. Effects of short term nitrogen addition on dissolved organic carbon in topsoil of poplar plantation [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2014, 38(06): 23-27.
[11]	ZHU Yi. Effect of coastal saline soils inoculated with silicate bacteria to growth of Festuca arundinacea and topsoil leaching desalination [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2012, 36(02): 106-110.
[12]	WANG Limin, CHEN Jinlin, LIANG Zhenhai, Chen Feiran, WANG Lina, ZHAO Hao, XUE Dan. Effects of jute straw and organic fertilizer on the biological properties of the coastal saline soil [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2010, 34(01): 39-42.
[13]	YU Yuan-chun1, HE Sheng1, LI Bing-kai2, LI Shu-fen3, JIANG De-feng1. The Dissolved Organic Carbon (DOC) Adsorption and Its Influence Factor on the Soil of Chinese Fir Plantation [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2005, 29(02): 15-18.