Response of soil nutrients and stoichiometric ratios to short-term land use conversions in a salt-affected region, northeastern China

Yu, Pujia; Liu, Shiwei; Xu, Qiao; Fan, Genghua; Huang, Yingxin; Zhou, Daowei

doi:10.1016/j.ecoleng.2019.01.005

Cited by 24 publications

(15 citation statements)

References 34 publications

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“…Interestingly, using the new method, the respective predictive ability of SA tolerance was lower than that of Ca 2+ (Table 3). This finding suggests a minor role of shoot Na + or K + in SA tolerance under SA field conditions at our site, probably because the soil available K under SA field conditions is relatively high and adequate for uptake by alfalfa roots (Table 1) [86]. Consequently, the SATC of shoot K + /Na + might not serve as a reliable marker for plant tolerance to SA under field conditions.…”

Section: Identification Of the Best Markers For Predicting The Salinementioning

confidence: 83%

Ca2+/Na+ Ratio as a Critical Marker for Field Evaluation of Saline-Alkaline Tolerance in Alfalfa (Medicago sativa L.)

et al. 2020

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Current indices of saline-alkaline (SA) tolerance are mainly based on the traditional growth and physiological indices for salinity tolerance and likely affect the accuracy of alfalfa tolerance predictions. We determined whether the inclusion of soil alkalinity-affected indices, particularly Ca2+, Mg2+, and their ratios to Na+ in plants, based on the traditional method could improve the prediction accuracy of SA tolerance in alfalfa, determine important indices for SA tolerance, and identify suitable alfalfa cultivars in alkaline salt-affected soils. Fifty alfalfa cultivars were evaluated for their SA tolerance under SA and non-SA field conditions. The SA-tolerance coefficient (SATC) for each investigated index of the alfalfa shoot was calculated as the ratio of SA to non-SA field conditions, and the contribution of SATC under different growth and physiological indices to SA tolerance was quantified based on the inclusion/exclusion of special alkalinity-affected indices. The traditional method, excluding the special alkalinity-affected indices, explained nearly all of the variation in alfalfa SA tolerance, and the most important predictor was the SATC of stem length. The new method, which included these special alkalinity-affected indices, had similar explanatory power but instead identified the SATC of shoot Ca2+/Na+ ratio, followed by that of stem length, as key markers for the field evaluation of SA tolerance. Ca2+, Mg2+, and their ratios to Na+ hold promise for enhancing the robustness of SA-tolerance predictions in alfalfa. These results encourage further investigation into the involvement of Ca2+ in such predictions in other plant species and soil types under more alkaline salt-affected conditions.

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Section: Identification Of the Best Markers For Predicting The Salinementioning

confidence: 83%

Ca2+/Na+ Ratio as a Critical Marker for Field Evaluation of Saline-Alkaline Tolerance in Alfalfa (Medicago sativa L.)

et al. 2020

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“…Phragmites australis (a perennial C 3 plant), Chloris virgata (an annual C 4 plant) and Kalimeris integrifolia (a perennial C 3 plant) are also abundant [26]. The vegetation coverage ranged from 50% to 90%, with 100–360 g m -2 of aboveground biomass in the peak biomass season [27]. The soil in the study area is saline-alkaline, which is equivalent to an Aqui-Alkalic Halosol based on the Chinese soil classification or a Salic Solonetz in the World Reference Base for Soil Resources (WRB) [28].…”

Section: Methodsmentioning

confidence: 99%

“…The available soil phosphorus content was 2.5 mg kg - 1 . The soils contained high contents of free sodium bicarbonate (NaHCO 3 ) and sodium carbonate (Na 2 CO 3 ) [27].…”

Section: Methodsmentioning

confidence: 99%

Grazing offsets the stimulating effects of nitrogen addition on soil CH4 emissions in a meadow steppe in Northeast China

Ren

Zhao

et al. 2019

PLoS ONE

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Grazing is the most common land use type for grasslands, and grazing may alter the impacts of the predicted enhancement of nitrogen deposition on soil CH4 flux. To understand the effects of nitrogen addition, grazing, and their interactions on soil CH4 flux, we conducted a field study on CH4 flux in a meadow steppe in Northeast China from 2017 to 2018. We measured the soil CH4 flux and soil physiochemical and vegetation parameters. The studied meadow steppe soil acted as a CH4 source due to the legacy effects of an extreme rainfall event. During the experimental period, the average CH4 fluxes were 7.8 ± 1.0, 5.8 ± 0.5, 9.3 ± 0.9 and 7.6 ± 0.6 μg m-2 h-1 for the CK (control), G (grazing), N (nitrogen addition) and NG (grazing and nitrogen addition) treatments, respectively. The cumulative CH4 fluxes were 24.9 ± 2.6, 11.5 ± 4.9, 28.8 ± 4.2 and 17.8 ± 3.5 μg m-2 yr-1 for the CK, G, N and NG treatments, respectively. The N addition increased the average CH4 flux by 19%, and the grazing treatment reduced it by 25%. The soil CH4 flux was positively correlated with the 0–10 cm soil water filled pore space (P < 0.01), soil NH4+-N (P < 0.01) and soil NO3--N (P < 0.01), but negatively correlated with the 0–10 cm soil temperature (P < 0.01), except for the sampling dates that were strongly influenced by the extreme rainfall event. The average CH4 flux was significantly (P < 0.05) affected by the grazing and N addition treatments with the N addition treatment significantly (P < 0.05) increased the CH4 flux, whereas grazing significantly (P < 0.05) decreased the CH4 flux. Grazing offset the stimulating effects of N addition on CH4 flux, and there was no difference (P = 0.79) in the CH4 flux between the CK and NG plots. In summary, moderate grazing has the potential to reduce the negative impacts of N addition on CH4 flux and can increase the capacity of the soil CH4 sink in the studied meadow steppe.

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“…Natural succession and afforestation were the two main ways of local ecological restoration. Many researchers have studied the effects of land conversion on soil quality improvement, for example, soil nutrients (Yu et al, 2019), structure (Wu, Liu, Fang, Deng, & Shi, 2016), and microbial community compositions Tian et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The response of soil microbial communities to soil erodibility depends on the plant and soil properties in semiarid regions

et al. 2021

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Natural succession and afforestation are the two main restoration methods of degraded soil in semiarid and arid regions. Up to now, the soil microbial communities and their roles in soil erodibility have been unclear. Our work aimed to evaluate the effects of ecological restoration on the diversity and composition of soil microbial communities at depths of 0-20 cm and their interaction with soil erodibility. Four main restoration types, natural succession land and Pinus tabuliformis, Armeniaca sibirica, and Robinia pseudoacacia plantations were chosen. Restoration with different vegetation communities decreased the soil erodibility K-factor (K) by 13.37-20.64%. Proteobacteria, Acidobacteria, and Actinobacteria were dominant bacterial phyla at all sites. The dominant fungal phyla were Basidiomycota, Ascomycota, and Zygomycota. However, there were obvious differences in bacterial and fungal communities among restoration types due to variations in plant and soil properties.Redundancy analysis showed that the soil microbial communities explained 67.30%

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Response of soil nutrients and stoichiometric ratios to short-term land use conversions in a salt-affected region, northeastern China

Cited by 24 publications

References 34 publications

Ca2+/Na+ Ratio as a Critical Marker for Field Evaluation of Saline-Alkaline Tolerance in Alfalfa (Medicago sativa L.)

Ca2+/Na+ Ratio as a Critical Marker for Field Evaluation of Saline-Alkaline Tolerance in Alfalfa (Medicago sativa L.)

Grazing offsets the stimulating effects of nitrogen addition on soil CH4 emissions in a meadow steppe in Northeast China

The response of soil microbial communities to soil erodibility depends on the plant and soil properties in semiarid regions

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