Soil calcium prompts organic carbon accumulation after decadal saline-water irrigation in the Taklamakan desert

Feng, Wenjie; Jiang, Jiang; Lin, Litao; Wang, Yugang

doi:10.1016/j.jenvman.2023.118421

Cited by 6 publications

(4 citation statements)

References 53 publications

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“…Cao Chengyou et al found that the restoration and construction of artificial vegetation under artificial brackish drip irrigation conditions in the flowing dunes of the Horqin Sandland benefited the improvement of soil nutrient levels and biological activity [51][52][53]. Organic matter is one of the most important indicators of soil fertility [54]. It is the difference between soil organic matter inputs and their utilization by plants and microorganisms.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, the protective forest belt deep in the desert hinterland has deteriorating soil quality, with the lowest rating in Sample Site 7 (SQI = 0.254). Although the protective forest is irrigated and receives consistent nutrient inputs, damage from sand and wind is caused by the harsh environment in the Tarim Desert's hinterland [62,63], resulting in soil structure destruction, topsoil loss, plant death, cover loss, soil resanding and salinization, soil water and nutrient loss, decreased enzyme activity, and rapid soil quality degradation [47,48,54,64]. In the southern part of the research region, the soil quality of the protection forest is notably high, averaging 0.493.…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Soil Quality and Analysis of Barriers of Protection Forests along Tarim Desert Highway Based on a Minimum Data Set

Liu,

Li,

et al. 2024

Land

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To gain a thorough grasp of the soil quality conditions in the preservation forests along the Tarim Desert Highway, a detailed assessment of the research area’s soil quality is necessary, along with the identification of any potential obstacles. This evaluation should identify any potential obstacles and provide a theoretical basis for the sustainable utilization and precise management of protection forest soils. This paper examines the protection forest along the Tarim Desert Highway as the study area. To characterize the features of the soil quality, thirteen indicators of the chemical, physical, and biological composition of the soil were examined. The principal component analysis method was used to construct the minimum dataset (MDS) for soil quality evaluation. The diagnostic model for obstacle factors was combined with the MDS to explore the soil quality characteristics and obstacle factors in the study region. The findings indicated that (1) the constructed indexes of the MDS of protection forest soil in the study area included soil ammonium nitrogen (NH4+-N); quick-acting phosphorus (AvP); organic carbon (SOC); alkaline phosphatase (AP); and total salt (SS); (2) soil quality based on the MDS and the total dataset (TDS) showed a significant positive correlation (R2 = 0.748; p < 0.05), and the research region’s soil quality were all in the medium and below level (100% of SQI ≤ 0.6), showing the status quo of high soil quality in the two ends of the shelterbelt forest and the tower center area, while the other areas were relatively low; (3) according to the findings of the soil barrier analysis, the two main obstacles influencing the soil quality of the shelterbelt forest at this time are NH4+-N and SOC, and that the soil quality of the shelterbelt forest could be improved by artificially increasing the inputs of nutrients and precise conservation measures, promoting the overall function of artificial protective forests on desert highways. In addition to providing a solid scientific foundation for the sustainable use and maintenance of shelterbelt forests along the Tarim Desert Highway, this study is also an invaluable resource for researching the soil quality of artificial shelterbelt forests in arid regions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Evaluation of Soil Quality and Analysis of Barriers of Protection Forests along Tarim Desert Highway Based on a Minimum Data Set

Liu,

Li,

et al. 2024

Land

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“…Meanwhile, our research offers evidence for the advantageous effect of soil Ca 2+ on the buildup of organic carbon in paddy soils but not in maize upland soils. High Ca 2+ in paddy soils could affect SOC by altering soil Ca 2+ , which stabilises organic matter via cation bridging; however, this process is often overlooked [93,94]. The higher pH in paddy soil results in aggregates, and the carbon associated with them is more stable as soil aggregates than maize; however, the monovalent cations (i.e., K and Na) from both land types did not show significant stabilisation of carbon in the soil.…”

Section: Cation Exchangeable Capacity (Cec)mentioning

confidence: 99%

Decreasing Soil Organic Carbon in Maize Cultivated Soil in Lowland Northern Thailand: Evidenced by the Interactions between Nutrients and Dissolved Organic Carbon

Aumtong,

Chotamonsak,

Lapyai

2024

Preprint

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.Maize cultivation in Thailand faces challenges owing to climate change and soil organic carbon (SOC) loss. This highlights the importance of comparing maize soil with paddy soil in terms of the role of dissolved organic carbon (DOC) and nutrient availability, as they influence SOC content. Soil samples from Chiang Mai province, primarily Fluvisol, were collected for the cultivation of paddy rice and maize, analysed for carbon fractions and chemical properties, and categorised into layers. Comparative analysis revealed that maize soils had lower levels of labile carbon components and organic carbon than paddy soils (P

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“…Next, the suspensions were left for 4 h for filtering and extracting, and finally, the extracted data were used to evaluate the relationship between the EC and salt content of eight soil salinity types. At present, in Xinjiang, soil samples are usually collected using the conventional extraction method of passing through a 2 mm sieve, configuring the leaching solution with a 5:1 water-soil ratio, shaking for 3 min, and then filtering to obtain data on the soil water-soluble salts or salt ions [22][23][24], which are mainly used for saline soil research, especially for assessing the degree of soil salinization. Compared to saline soils, there are fewer studies on soil salinity and salt analyses in other aridisol types.…”

Section: Introductionmentioning

confidence: 99%

Using Different Extraction Methods to Estimate Soil Salinity and Salt Type Changes and Their Effects on Soil Inorganic Carbon in Plowed Desert–Sierozem Soil

Peng,

Zhang,

Shao

2024

Land

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Understanding the actual soil salt ion content and salt type is one of the important prerequisites for determining the nature of saline soils and their development and utilization in drylands. Desert–sierozem soils are widely distributed in the plains between the northern piedmont of the Tianshan Mountains and the Gurbantunggut Desert in Xinjiang, Northwest China, which contain abundant calcium sulfate (gypsum) and calcium carbonate and are high-quality arable land resources for agriculture. These soils have been extensively reclaimed for farmland in recent decades. In this study, 10 plots of desert–sierozem soils with different tillage years in the Qitai Oasis plain area in the northern piedmont of Tianshan Mountain were studied. Three soil profiles were excavated in each sample plot with a depth of 1.2 m. A total of 30 farmland profiles were dug up and sampling was conducted according to the soil occurrence layers of the farmland. All the soil samples were predominantly sandy in texture, with more than 92% of the soil particles distributed between 0.05 and 0.25 mm, and less than 8% between 0.002 and 0.05 mm. Conventional water extraction (CWE) and intensified water extraction (IWE) were adopted to extract the water-soluble salt ions content of K+, Na+, Ca2+, Mg2+, Cl−, SO42−, HCO3− and CO32−, and this study compared the extraction results using two different methods with varying extraction strengths. Additionally, the calcium sulfate and calcium carbonate contents were obtained using the chemical extraction and mineral assay methods, respectively. Differences in the salts and salt types in desert–sierozem soils with different tillage years were analyzed, and the effect of calcium sulfate on the inorganic carbon sinks in plowed desert–sierozem soil was demonstrated. The findings indicated that the standard conventional extraction procedure involving a 5:1 water–soil ratio and 3 min of shaking was inadequate for accurately measuring the soil salt content in high calcium sulfate content desert–sierozem soils. With the IWE method, by increasing the water–soil ratio, prolonging the shaking time, and grinding the particles finer, the amount of water-soluble salts extracted using the IWE method was 5.83 times higher than that of the conventional method. Among them, the average content of IWE-Mg2+ increased by 123.41 mg kg−1 compared to CWE-Mg2+, the average content of IWE-Ca2+ was 3.82 times higher than CWE-Ca2+, with an average increase of 2931.59 mg kg−1, and the IWE-SO42− content was 5.96 times higher than CWE-SO42−, with an average increase of 8658.95 mg kg−1. A markedly negative correlation (p < 0.01) was observed between calcium carbonate and calcium sulfate in desert–sierozem soils after tillage. The calcium sulfate content consistently decreased and calcium carbonate increased with an increasing number of tillage years. The pedogenic calcium carbonate content in desert–sierozem soils increased by an average of 10.86 g kg−1 after more than 40 years of cultivation, and the transfer of Ca2+ from calcium sulfate to calcium carbonate was identified as the cause of the increase in the soil inorganic carbon sink. Overall, a new method for extracting water-soluble salts was utilized for aridisols, which commonly consist of complex salt types. The results elucidate the changes in salinity within plowed desert–sierozem soils as well as the impact of soil salt on soil inorganic carbon sinks. Based on our research, desert–sierozem soils are well suited for agricultural farming because they contain high levels of sulfate, which is one of the important inorganic nutrients essential for crops, and it also provides a source of calcium for increasing inorganic carbon sinks. This study serves as a reference and scientific basis for soil carbon cycles in arid zones.

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Soil calcium prompts organic carbon accumulation after decadal saline-water irrigation in the Taklamakan desert

Cited by 6 publications

References 53 publications

Evaluation of Soil Quality and Analysis of Barriers of Protection Forests along Tarim Desert Highway Based on a Minimum Data Set

Evaluation of Soil Quality and Analysis of Barriers of Protection Forests along Tarim Desert Highway Based on a Minimum Data Set

Decreasing Soil Organic Carbon in Maize Cultivated Soil in Lowland Northern Thailand: Evidenced by the Interactions between Nutrients and Dissolved Organic Carbon

Using Different Extraction Methods to Estimate Soil Salinity and Salt Type Changes and Their Effects on Soil Inorganic Carbon in Plowed Desert–Sierozem Soil

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