Ameliorative effect of poly-γ-glutamic acid biopreparation on coastal saline soil

被引:0
|
作者
Liu, Pei [1 ]
Chen, Lihua [1 ]
Hamoud, Yousef Alhaj [2 ]
Zheng, Jinhai [3 ]
Chang, Tingting [1 ]
Ali, Jawad [1 ]
Huang, He [1 ,4 ]
Shaghaleh, Hiba [5 ]
机构
[1] Hohai Univ, Coll Agr Sci & Engn, Nanjing 210098, Peoples R China
[2] Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Peoples R China
[3] Hohai Univ, Coll Harbour Coastal & Offshore Engn, Nanjing 210098, Peoples R China
[4] Nanjing Forestry Univ, Coll Forestry, Nanjing 210037, Peoples R China
[5] Hohai Univ, Coll Environm, Nanjing 210098, Peoples R China
关键词
Coastal silty saline soil; Poly-gamma-glutamic acid; Salt distribution; Bacillus amyloliquefaciens; Soil amelioration; WATER;
D O I
10.1016/j.heliyon.2024.e36762
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
To investigate the effect of poly<bold>-</bold>gamma<bold>-</bold>glutamic acid (gamma-PGA) biopreparation on ameliorating coastal saline soil, three treatments were established: soil salt washed treatment (CK), soil salt washed with added gamma<bold>-</bold>PGA (PGA), soil salt washed with added gamma<bold>-</bold>PGA biopreparation (PGAB). This study determined the effects of gamma-PGA on coastal saline soil by analyzing soil aggregate, soil evaporation, soil vertical water and salt distribution, and soil cation content, soil pH, soil nutrient content and soil microorganism quantity. Results showed that gamma-PGA had an ameliorative effect on saline soil, with the PGAB treatment exhibiting the most pronounced ameliorative effect compared to CK. Adding PGAB reduced soil evaporation by 30.45 %, soil salt content by 27.91 %, meanwhile increasing plant height by 33.86 %, plant fresh weight by 98.54 %, soil aggregate diameter by 6.68 times, soil water content by 26.47 % (P < 0.05). Additionally, soil total nitrogen was increased by 50.0 % in PGAB treatment, and available nitrogen and phosphorus contents were increased by 1.68 times and 85.83 % (P < 0.05), respectively. Populations of soil-culturable bacteria and fungi of PGAB treatment increased by 65.96 % and 1.23 times, respectively (P < 0.05). After salt-washing process, adding PGAB improved soil physicochemical properties, which altered the ecological environment of rhizosphere soil and promoted plant growth. The results can provide a practical approach for ameliorating coastal saline soils.
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页数:10
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