Study on the new dynamics and driving factors of soil pH in the red soil, hilly region of South China

Shen, Yuxuan; Zhang, Zhongqi; Xue, Yue

doi:10.1007/s10661-021-09080-4

Cited by 19 publications

(7 citation statements)

References 40 publications

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“…The application of N fertilizer in orchards tends to decrease soil pH and accelerate soil acidification (Chien et al, 2008;Guan et al, 2022;Zhu et al, 2018). In contrast, planting grass and cash crops in orchards could improve N utilization and increase soil organic matter, contributing to a higher soil buffering capacity and slowing down soil pH decline (Shen et al, 2021), which is also confirmed in the present study. These results further indicate that both biological and engineering measures have the potential to alleviate soil acidification in eroded orchards.…”

Section: Soil Physicochemical Properties Under Different Conservation...supporting

confidence: 87%

Biological conservation measures are better than engineering conservation measures in improving soil quality of eroded orchards in southern China

Qin

Zhang

et al. 2022

Soil Science Soc of Amer J

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Both biological and engineering measures have proven to be effective soil and water conservation practices for eroded environments, whereas how the soil quality varies with them remains unclear. In this study, we measured soil properties in the 0-to-100-cm soil layer of eroded orchards in southern China after 17-yr of application of different conservation measures. The purpose of the experiment was to examine the effect of biological (grass planting, intercropping) and engineering measures (terrace) on the soil quality of eroded orchards. We selected an orchard plot with traditional clean-tillage as control. In comparison, soil pH, organic carbon, total phosphorus, microbial carbon, available potassium, and available microelements contents increased significantly in orchards with biological measures, and the improvements were more dramatic in orchards planting grass in strips. However, biological measures significantly reduced the mean weight diameter of aggregates. Engineering measures significantly increased the soil pH of orchards but decreased the contents of available iron and available manganese. The soil quality index (SQI)

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Section: Soil Physicochemical Properties Under Different Conservation...supporting

confidence: 87%

Biological conservation measures are better than engineering conservation measures in improving soil quality of eroded orchards in southern China

Qin

Zhang

et al. 2022

Soil Science Soc of Amer J

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“…One part of soil was passed through a 2-mm sieve for the determination of pH, EH + , EAl 3+ and clay extraction, another part was passed through a 0.25 mm sieve for the determination of SOM, soil surface charge and SSA. Based on the pH value of the 0-20-cm soil layer, the 9 sampled sites were divided into three groups according to the soil acidity grading standards of the Second National Soil Census [22,23]: strongly acidic, pH < 4.5 (Group I); acidic, 4.5 < pH < 5.5 (Group II); and weakly acidic, 5.5 < pH < 6.5 (Group III).…”

Section: Soil Samplesmentioning

confidence: 99%

Effect of Acidification on Clay Minerals and Surface Properties of Brown Soil

et al. 2022

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Globally, soil acidification is becoming a serious environmental and ecological concern, posing a major threat to ecosystem functions and services. In order to clarifying the acidification mechanism, evaluating acidification risk, and reconditioning soil acidification, the effects of acidification on clay mineral composition and soil surface properties should be evaluated. In this study, the surface charge, specific surface area (SSA), species and content of clay minerals were investigated using the ion adsorption method, methylene blue method, and X-ray diffraction (XRD) for brown soil samples, which collected from Muping, Shandong Province, China. The results showed that the clay mineral species and content varied with the degree of acidification. A small amount of montmorillonite was found in weakly acidic soils, and gibbsite was found in strongly acidic soils. Furthermore, although illite, kaolinite, vermiculite, and chlorite were commonly found in soils with different acidification degrees, their content differed. The negative charge (CEC8.2), permanent negative charge (CECP), variable negative charge (CECV), and SSA values decreased with increasing acidification, while anion exchange capacity values (AEC) decreased. The change of CECV was caused by soil organic matter, and the change of CECP was caused by illite content, which accounted for the largest proportion in clay minerals of brown soil.

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“…However, another study reported that an increase in soil pH will promote the activity of methanogens (Liu et al 2011). There are also reports that the production of CH 4 is affected by a combination of various soil properties (Shen et al 2021). Therefore, effects of other soil properties should be considered when the effects of organic matters on CH 4 emissions are assessed.…”

Section: Ch 4 Emissionsmentioning

confidence: 99%

Effects of Drainage on Greenhouse Gas Emissions and Yields of Lowland Rice-Wheat Rotation System in East China

Hua

et al. 2021

Preprint

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The subtropical region of East China is characterized by abundant water and temperature resources conducive to crop cultivation, and large areas of lowland have been widely used for agricultural planting. To explore the feasible methods of greenhouse gases (GHGs) reduction for rice-wheat rotation system, shallow ditch (SD) and deep ditch (DD) treatments in the wheat season were set up for drainage to control the water content in soil, with the conventional non-ditching treatment as the control group (CG). Results showed that methane (CH4) emissions from paddy soil were in the majority in global warming potential (GWP) in rice-wheat rotation system. In the three years, compared with that of CG, the CH4 cumulative emissions of SD and DD were reduced by 65.80% and 63.42% (rice season), and 101.37% and 77.28% (wheat season), respectively; the nitrous oxide (N2O) cumulative emissions of SD and DD were reduced by 27.62% and 11.30% (rice season), and 1.53% and -37.40% (wheat season), respectively; the total GWP produced by SD and DD in the three years was reduced by 58.78% and 52.22%, respectively; GHG emission intensity (GHGI) of SD and DD declined by 60.67% and 53.85%, respectively; the CH4 emission flux was significantly positively correlated with atmospheric temperature and 5 cm ground temperature, but negatively correlated with soil Eh; when the soil Eh value was lower than -150 mV, the CH4 emission flux increased significantly, indicating that -150 mV was the key soil Eh value for CH4 emissions in this area; in addition, both SD and DD led to markedly decrease in soil organic matter content and an increase in soil pH. The findings indicate that SD and DD not only ensure stably increasing production, but also effectively reduce GHG emissions.

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Study on the new dynamics and driving factors of soil pH in the red soil, hilly region of South China

Cited by 19 publications

References 40 publications

Biological conservation measures are better than engineering conservation measures in improving soil quality of eroded orchards in southern China

Biological conservation measures are better than engineering conservation measures in improving soil quality of eroded orchards in southern China

Effect of Acidification on Clay Minerals and Surface Properties of Brown Soil

Effects of Drainage on Greenhouse Gas Emissions and Yields of Lowland Rice-Wheat Rotation System in East China

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