Chemical-Structural Changes of Organic Matter in a Semi-Arid Soil After Organic Amendment

Abstract. Soil coarseness is the main process decreasing soil organic matter and threatening the productivity of sandy grasslands. Previous studies demonstrated negative effect of soil coarseness on soil carbon storage, but less is known about how soil base cations (exchangeable Ca, Mg, K, and Na) and available micronutrients (available Fe, Mn, Cu, and Zn) response to soil coarseness. In a semi-arid grassland of Northern China, a field experiment was initiated in 2011 to mimic the effect of soil coarseness on soil base cations and available micronutrients by mixing soil with different mass proportions of sand: 0 % coarse elements (C0), 10 % (C10), 30 % (C30), 50 % (C50), and 70 % (C70). Soil coarseness significantly increased soil pH in three soil depths of 0–10, 10–20 and 20–40 cm with the highest pH values detected in C50 and C70 treatments. Soil fine particles (smaller than 0.25 mm) significantly decreased with the degree of soil coarseness. Exchangeable Ca and Mg concentrations significantly decreased with soil coarseness degree by up to 29.8 % (in C70) and 47.5 % (in C70), respectively, across three soil depths. Soil available Fe, Mn, and Cu significantly decreased with soil coarseness degree by 62.5, 45.4, and 44.4 %, respectively. As affected by soil coarseness, the increase of soil pH, decrease of soil fine particles (including clay), and decline in soil organic matter were the main driving factors for the decrease of exchangeable base cations (except K) and available micronutrients (except Zn) through soil profile. Developed under soil coarseness, the loss and redistribution of base cations and available micronutrients along soil depths might pose a threat to ecosystem productivity of this sandy grassland.

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Crop Production and Soil Organic Matter in Long-Term Crop Rotations in the Semi-Arid Northern Great Plains of Canada

Soil Organic Matter in Temperate Agroecosystems ◽

10.1201/9780367811693-23 ◽

2019 ◽

pp. 317-334 ◽

Cited By ~ 1

Author(s):

C.A. Campbell ◽

R.P. Zentner

Keyword(s):

Organic Matter ◽

Soil Organic Matter ◽

Great Plains ◽

Crop Production ◽

Crop Rotations ◽

Northern Great Plains ◽

Semi Arid

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Above and Belowground Growth of Corymbia maculata in a Constructed Soil: The Effect of Profile Design and Organic Amendment

Arboriculture & Urban Forestry ◽

10.48044/jauf.2010.002 ◽

2010 ◽

Vol 36 (1) ◽

pp. 11-17

Author(s):

Karen Smith ◽

Peter May ◽

Robert White

Keyword(s):

Organic Matter ◽

Root Length ◽

Organic Amendment ◽

Root Length Density ◽

Dry Weight ◽

Nutrient Status ◽

Fertilizer Treatment ◽

Coir Fiber ◽

Growth Responses ◽

Profile Design

Spotted gum (Corymbia maculata (Hook.) K.D. Hill & L.A.S. Johnson), a common street tree in southern Australian cities, was used to assess growth responses to variations in profile design and organic amendment of constructed soils. Aboveground growth responses were total stem dry weight and foliar nutrient content. The belowground response was root length density. Soil profiles were constructed of sand, amended with either coir fiber, composted biosolids or composted green waste, at rates of 0, 5, 10 or 20% by volume. The profiles were either layered, with a 150 mm (6 in) organic-amended surface layer, or uniform, with amendment of the entire profile. A single fertilizer treatment was applied to all profiles. Shoot dry weight was only affected by organic matter type with the greatest growth in sand amended with composted biosolids. Foliage P and K content were affected by amendment but foliage N was not. Profile design affected root length density and distribution. Trees in uniform profiles had greater root length density, and a more uniform distribution of roots, especially with compost amendments. Above- and belowground growth increases are thought to be due to increased nutrient status resulting from organic matter mineralization.

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Comparison of wheat and safflower cultivation areas in terms of total carbon and some soil properties under semi-arid climate conditions

Solid Earth Discussions ◽

10.5194/sed-7-1007-2015 ◽

2015 ◽

Vol 7 (1) ◽

pp. 1007-1024

Author(s):

B. Turgut

Keyword(s):

Organic Matter ◽

Physical Properties ◽

Organic Matter Content ◽

Aggregate Stability ◽

Soil Physical Properties ◽

Matter Content ◽

Total Carbon ◽

Arid Climate ◽

Soil Layers ◽

Semi Arid

Abstract. The aim of this study was to compare the soils of the wheat cultivation area (WCA) and the safflower cultivation area (SCA) within semi-arid climate zones in terms of their total carbon, nitrogen, sulphur contents, particle size distribution, aggregate stability, organic matter content, and pH values. This study presents the results from the analyses of 140 soil samples taken at two soil layers (0–10 and 10–20 cm) in the cultivation areas. At the end of the study, it has been established that there were significant differences between the cultivation areas in terms of soil physical properties such as total carbon (TC), total nitrogen (TN), total sulphur (TS) contents and pH, while only the TN content resulted in significantly different between the two soil layers. Moreover significant differences were identified in the cultivation areas in terms of soil physical properties including clay and sand contents, aggregate stability and organic matter content, whereas the only significant difference found among the soil layers was that of their silt content. Since safflower contains higher amounts of biomass than wheat, we found higher amounts of organic matter content and, therefore, higher amounts of TN and TS content in the soils of the SCA. In addition, due to the fact that wheat contains more cellulose – which takes longer to decompose – the TC content of the soil in the WCA were found to be higher than that of the SCA. The results also revealed that the WCA had a higher carbon storage capacity.

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Spatial Variability of Organic Matter Dynamics in the Semi-Arid Croplands of Northern Kazakhstan

Soil Science & Plant Nutrition ◽

10.1111/j.1747-0765.2005.tb00030.x ◽

2005 ◽

Vol 51 (2) ◽

pp. 261-269 ◽

Cited By ~ 18

Author(s):

Junta Yanai ◽

Azusa Mishima ◽

Shinya Funakawa ◽

Kanat Akshalov ◽

Takashi Kosaki

Keyword(s):

Organic Matter ◽

Spatial Variability ◽

Northern Kazakhstan ◽

Organic Matter Dynamics ◽

Semi Arid

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Aspergillus fuscicans (Aspergillaceae, Eurotiales), a new species in section Usti from Argentinean semi-arid soil

Phytotaxa ◽

10.11646/phytotaxa.343.1.6 ◽

2018 ◽

Vol 343 (1) ◽

pp. 67 ◽

Cited By ~ 2

Author(s):

STELLA M. ROMERO ◽

RICARDO M. COMERIO ◽

VIVIANA A. BARRERA ◽

ANDREA I. ROMERO

Keyword(s):

New Species ◽

Sequence Analysis ◽

Sequence Data ◽

Arid Soil ◽

Physiological Studies ◽

A New Species ◽

Semi Arid ◽

Aspergillus Section ◽

Β Tubulin

Aspergillus fuscicans, a new species within Aspergillus section Usti from Argentinean semi-arid soil is introduced. Molecular, morphological and physiological studies were conducted, based on sequence analysis of partial β-tubulin and calmodulin sequence data. Aspergillus fuscicans formed a distinct, well-defined clade related to A. calidoustus and A. pseudodeflectus. In addition, A. fuscicans was able to grow and sporulate at 37 ºC, and had a negative Ehrlich reaction. Morphological and physiological features could be used to differentiate the new species from its phylogenetically related taxa.

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Pruning residues incorporation and reduced tillage improve soil organic matter stabilization and structure of salt-affected soils in Citrus tree orchard under semi-arid climate conditions

10.5194/egusphere-egu21-7839 ◽

2021 ◽

Author(s):

Noelia Garcia-Franco ◽

Martin Wiesmeier ◽

Luis Carlos Colocho Hurtarte ◽

Franziska Fella ◽

María Martínez-Mena ◽

...

Keyword(s):

Organic Matter ◽

Drip Irrigation ◽

Management Practices ◽

Reduced Tillage ◽

Citrus Tree ◽

Climate Conditions ◽

The World ◽

Pruning Residues ◽

Salt Affected Soils ◽

Semi Arid

<p>Arid and semiarid regions represent about 47% of the total land area of the world and around 40% of the world&#8217;s food is produced there. In these areas, soil salinization is an emerging problem due to unsustainable land management practices and climate change. However, the use of sustainable land management practices in salt-affected soils can offset the negative effects of salinization and increase soil carbon stocks. In a Citrus tree orchard under semi-arid climate conditions, we evaluated the effect of (i) intensive tillage along with flood irrigation (IT); (ii) combination of no-tillage with pruning residues (branches and leaves) as mulch, and drip-irrigation (NT+PM); and (iii) combination of reduced tillage with the incorporation of pruning residues and drip-irrigation (RT+PI), on aggregate stability, amount and quality of organic matter fractions and soil organic carbon (OC) sequestration. Our results showed that the incorporation of pruning residues through reduced tillage decreased bulk density and salinity while soil porosity, soil OC and N stocks, and percentage of OC-rich macroaggregates increased compared to the IT system.&#160; However, the positive effects of the NT+PM system on soil properties were limited to the topsoil. The IT management system showed the highest values of bulk density and salinity and lower amounts of macroaggregates and soil OC stocks. In conclusion, the combination of pruning residues through the reduced tillage and drip-irrigation was the most effective systems to improve soil structure and OC sequestration and reduced the salt content under Citrus tree orchard in semi-arid soils</p>

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