Moisture movement, soil salt migration, and nitrogen transformation under different irrigation conditions: Field experimental research

Su, Fengmei; Wu, Jianhua; Wang, Dan; Zhao, Hanghang; Wang, Yuanhang; He, Xiaodong

doi:10.1016/j.chemosphere.2022.134569

Cited by 55 publications

(17 citation statements)

References 73 publications

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“…The elements C, N, and P are the basis for the composition of all living substances on earth ( Jordi et al., 2012 ). For plants, C constitutes the basic structure of plants, accounting for about 50% of their biomass ( Schade et al., 2003 ; Liu et al., 2011 ); N is the basic component of enzymes and plays a crucial role in plant production and photosynthesis ( Elser et al., 2000 ); P is an essential element for nucleic acids and cell membranes, responsible for the composition of cellular structural DNA and RNA ( Tilman, 2004 ; Bai et al., 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Ecological stoichiometry, salt ions and homeostasis characteristics of different types of halophytes and soils

Zhao

Liu

et al. 2022

Front. Plant Sci.

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Studying eco-stoichiometric and salt ions characteristics of halophytes and soils is helpful to understand the distribution mechanism of nutrients and salts in halophytes and their adaptation strategies to salinized habitats. In this study, three different types of halophytes (Phragmites communis-salt repellent, Suaeda salsa-salt accumulating, and Aeluropus sinensis- salt secreting) and soils were selected to analyze the differences and correlations of C, N, P stoichiometry and salt accumulation. Results showed that: (1) the total nitrogen (TN) and total phosphorus (TP) contents of the three halophytes’ leaves were significantly higher than those of the roots and stems, and the C: N ratios were contrary to the difference mentioned above. The growth of P. communis and S. salsa was mainly limited by P, whereas A. sinensis was limited by both N and P. S. salsa had a stronger absorption capacity for Na+ and Mg2+ than P. communis and A. sinensis. The interrelationship between salt ions and C, N and P ecological stoichiometry of halophyte organs was influenced by the type of halophytes. (2) The TC, TN, and N: P contents of the three halophyte communities in the surface soil (0-20 cm) were significantly higher than the other soil layers, while P did not differ significantly among soil layers. The planting of different halophytes affected the TC, TN, C: N, N: P values and the content of seven ions in the surface soil. SO42-was positively correlated with soil TC, TN, N:P, and Na+ were positively correlated with soil TC in three halophytes. (3) The P. communis TC and A. sinensis TN contents were negatively correlated with soil TC, TN, C: P, and N: P, whereas TC contents of S. salsa were positively correlated with the aforementioned soil indicators. The P. communis and A. sinensis TC contents were negatively correlated with soil K+, while this correlation was opposite between S. salsa and soil. (4) The homeostasis of C, N, and P elements in all three halophytes showed that C > N > P, the homeostasis was strongest in A. sinensis and weakest in S. salsa. The results provide a theoretical basis for the restoration of saline land in the Yellow River Delta.

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Section: Introductionmentioning

confidence: 99%

Ecological stoichiometry, salt ions and homeostasis characteristics of different types of halophytes and soils

Zhao

Liu

et al. 2022

Front. Plant Sci.

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“…As plants take up water and transpire, salts from the groundwater and lower soil layers migrate to the upper soil layers, resulting in a higher salt concentration in the surface soil layer. Consequently, the salt concentration at the soil surface serves as a critical indicator of saline soils (Su et al, 2022). Contrary to these findings, our result does not align with the variation pattern of four cation concentrations across different soil layers of three halophyte species and also deviates from the results of Zhao et al (2022) for medium salinity saline soils (Figure 5), which indicated that the cultivating of the three halophytes could reduce the K + , Ca 2+ , Na + , and Mg 2+ contents in the soil surface layer in scenarios with elevated salt concentrations.…”

Section: Discussionmentioning

confidence: 99%

Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

Zhao,

Li,

Sun

et al. 2023

Land Degrad Dev

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Ecological stoichiometric homeostasis represents the physiological and biochemical adaptations of organisms to variations in environmental conditions and plays a pivotal role in maintaining ecosystem stability. However, existing literature predominantly concentrates on the changes in plant homeostasis under different external environments. There is a paucity of comparative analyses focusing on the stoichiometric homeostasis attributes among different types of halophytes, particularly using these halophytes as a primary investigative lens. In this study, by analyzing the differences in organ and soil ecological stoichiometry as well as salt accumulation characteristics of three halophytes (Phragmites communis, Suaeda salsa, and Tamarix chinensis) in the Yellow River Delta, we revealed the salt ion enrichment capacity and stoichiometric homeostasis characteristics of the three halophytes and clarified the adaptive capacity of the three halophytes in saline soil environments. Our results indicated that S. salsa accumulated more Na+ and Mg2+, while P. communis maintained a low salt content in its surrounding soil. The soil C:N ratios of P. communis and S. salsa negatively correlated with most ions, while T. chinensis displayed a positive correlation with ions. S. salsa demonstrated the highest ion enrichment but the least homeostasis, whereas T. chinensis showed superior homeostasis. We hypothesize that T. chinensis might have experienced a faster growth rate during the study period, and P. communis' topsoil appears to be more conducive for plant growth. The different salt tolerance strategies of these plants influenced homeostasis, with S. salsa demonstrating greater adaptability to soil modifications and higher potential in saline land management. These insights enhance our understanding of the physiological and ecological adaptations of halophytes and their contribution to improving the quality of saline soils in the Yellow River Delta.

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“…However, the soil EC e did not accumulate linearly with years, although it was related closely to amounts of irrigation and rainfall [23]. EC e in FBS is lower than that in BS, which may be due to the rainfall being large and concentrated in FBS, and the infiltration of soil water caused the migration of soil salt from the plow layer to the deep layer [35]. Therefore, soil salinity is dynamic and does not stay in the topsoil.…”

Section: Effect Of Swi On Soil Physical and Chemical Propertiesmentioning

confidence: 92%

Impacts of Saline Water Irrigation on Soil Respiration from Cotton Fields in the North China Plain

et al. 2023

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Saline water irrigation has been widely used for crop production where agriculture is short of freshwater. However, information about the response of soil respiration to saline water irrigation is limited. To identify the effect of saline water irrigation on soil respiration, the experiment based on long-term saline water irrigation cotton fields (since 2006) was conducted in the Heilonggang area in 2021. Five salinity levels in irrigation water were tested (3.4 [S1], 7.1 [S2], 10.6 [S3], 14.1 [S4], and 17.7 dS m−1 [S5]), and deep ground water (1.3 dS m−1) was used as the control (CK). After 15 years of saline water irrigation, we monitored soil physicochemical properties and soil respiration. In addition, we developed a structural equation model of the relationship between them. The results demonstrated that saline water irrigation significantly reduced soil water-stable aggregate content and porosity by 4.42–45.33% and 6.52–14.10%, respectively, and attenuated soil cellulase, α-glucosidase, and alkaline phosphatase activity. Soil respiration under saline water irrigation was significantly reduced by 5.28–33.08%. Moreover, saline water irrigation with salinity below 10.6 dS m−1 had no significant effect on cotton yield. Moreover, soil salinity (62%), water-stable aggregate content (46%), and soil porosity (25%) had significant effects on soil respiration, and soil porosity had a significant positive effect on soil alkaline phosphatase activity according to the structural equation model. Overall, saline irrigation with salinity below 10.6 dS m−1 can alleviate water shortages and reduce soil carbon emissions without affecting cotton yield in the study area.

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Moisture movement, soil salt migration, and nitrogen transformation under different irrigation conditions: Field experimental research

Cited by 55 publications

References 73 publications

Ecological stoichiometry, salt ions and homeostasis characteristics of different types of halophytes and soils

Ecological stoichiometry, salt ions and homeostasis characteristics of different types of halophytes and soils

Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

Impacts of Saline Water Irrigation on Soil Respiration from Cotton Fields in the North China Plain

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