Effects of fine roots on the distribution of soil water and soil organic carbon in a shelterbelt modified agricultural system

<p>Shelterbelts, also termed windbreaks, play a significant role in reducing soil erosion, sand drift, and protecting crops, livestock and farmstead. Cropland shelterbelts are known to improve the microclimate and provide protection against sand-related damages to crops. However, the protection of shelterbelts to crops may be complicated by fine roots near the edge of the shelterbelt, which directly affects the absorption of soil water and the accumulation of soil organic carbon. In this study, we investigated the effects of shelterbelt fine roots on farmland soil water content (SWC) and soil organic carbon density in an agricultural system located in northern China. The distribution characteristics of fine-root biomass density, soil water content and soil organic carbon density were measured at the 0-200 cm soil depth in a farmland shelterbelt system at distances of 0.3H (H is the windbreak height), 0.5H, and 0.7H from the shelterbelt with three replicates. Soil samples were randomly collected in the center of the cropland. The results showed that fine roots of shelterbelts concentrated at the depth of the 20-60 cm soil layer, whereas the fine roots of the crop summer squash (Cucurbita pepo L.) were mainly found within the top 20 cm of the soil profile. With the presence of shelterbelt fine roots, strong SWC deficiency that occurred up to100 cm in the soil profile was observed. The SWC was deficient at all sampling points, the overall shallow layer deficient was larger than the deep layer. In contrast, the soil organic carbon was cumulative, and the overall deep accumulation was greater than the shallow layer. The effects of fine roots on SWC and soil organic carbon density variations in different soil layers were inconsistent. The information accrued in this study can be used to evaluate the effect of farmland shelterbelt on soil water and soil carbon in the Hetao irrigation area of Inner Mongolia, northern China.</p>

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Spatial variability of soil organic carbon density under different land covers and soil types in a sub-humid terrestrial ecosystem

EURASIAN JOURNAL OF SOIL SCIENCE (EJSS) ◽

10.18393/ejss.486582 ◽

2019 ◽

Vol 8 (1) ◽

pp. 35-43 ◽

Cited By ~ 1

Author(s):

Orhan Dengiz ◽

Fikret Saygın ◽

Ali İmamoğlu

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Spatial Variability ◽

Terrestrial Ecosystem ◽

Soil Types ◽

Carbon Density ◽

Soil Organic Carbon Density ◽

Land Covers

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Soil organic carbon density and influencing factors in tropical virgin forests of Hainan Island, China

Chinese Journal of Plant Ecology ◽

10.17521/cjpe.2015.0314 ◽

2016 ◽

Vol 40 (4) ◽

pp. 292-303 ◽

Cited By ~ 3

Author(s):

YANG Huai ◽

◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Influencing Factors ◽

Hainan Island ◽

Carbon Density ◽

Soil Organic Carbon Density

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Soil organic carbon storage in moutain grasslands of the Lake Plateau at Mt. Durmitor in Montenegro

Glasnik Sumarskog fakulteta ◽

10.2298/gsf1206113k ◽

2012 ◽

pp. 113-128 ◽

Cited By ~ 3

Author(s):

Ratko Kadovic ◽

Snezana Belanovic ◽

Dragica Obratov-Petkovic ◽

Ivana Bjedov ◽

Veljko Perovic ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Average Density ◽

Mean Annual Temperature ◽

Carbon Density ◽

Mountain Areas ◽

Organic C ◽

C Storage ◽

Soil Variables ◽

Soil Organic Carbon Density

Soil organic C storage in mountain areas is highly heterogeneous, mainly as a result of local-scale variability in the soil environment and microclimate. The aims of the present study were to estimate soil organic carbon density (SOCD) and stocks in leptosol on morainic deposits of high-altitude grasslands of the Lake Plateau of Mt. Durmitor National Park in Montenegro, and determine the soil variables that can be used as factors to determine the SOCD at 28 soil profiles. Our results indicated that SOC storage in the top 40 cm of the alpine grasslands were estimated at 560 414.86 t C, or 152.66 t?ha-1, with an average density of 15.27 kg?m-2. The soil organic carbon density increased significantly with soil moisture, clay and silt content, but only moderately with mean annual temperature. In conjunction, these variables could explain approximately 51% of the total variation in SOC density.

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Spatial Distribution and Reserves Estimation of Soil Organic Carbon Based on GIS in Maiji Area of Tianshui

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.316-317.299 ◽

2013 ◽

Vol 316-317 ◽

pp. 299-306

Author(s):

Ai Hong Gai ◽

Ren Zhi Zhang ◽

Fang Chen ◽

Xiao Long Wang

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Average Density ◽

Soil Survey ◽

Soil Conditions ◽

Carbon Density ◽

Deep Soil ◽

Soil Organic Carbon Density ◽

Secondary Survey ◽

Organic Carbon Storage

The soil organic carbon density and storage of Maiji Area of Tianshui was estmiated, using the data of 6060 soil profile from the second soil survey of China and formulating fertilization for soil conditions in 2008. Integrating the soil map, land use status map and district map of Maiji Area of Tianshui, the index of the characteristic of soil organic distribution in different soil and soil layers were analyzed. Results showed: the soil of Maiji area have low average density, when soil secondary census, depths of 5cm,20cm,1m average density of organic carbon are 0.92kg•m-2,3.31kg•m-2,7.79kg•m-2 respectively, average density of organic carbon at depth of 20cm is 2.43 kg•m-2 in 2008 years, As a standard of Yu Dongsheng’s (2005) estimation of average density of 9.60 kg•m-2 in the depth of 1m all over the China, Maiji area 1m deep soil organic carbon density is lower 1.91kg•m-2 than the average density of whole country; The calculation of the secondary survey, reserves of organic carbon in surface soil (0-5cm) is about 4.83×106t, reserves of organic carbon in fall (0-20cm) is about 12.46×106t, reserves of soil organic carbon in 1m depth is about 45.17×106t, reserves of soil organic carbon in fall (0-20cm) is about 18.55×106t in 2008 years. In a word, the soil organic carbon storage was relatively indigent in Maiji Area of Tianshui.

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Regional pattern of soil organic carbon density and its influence upon the plough layers of cropland

Land Degradation and Development ◽

10.1002/ldr.3610 ◽

2020 ◽

Vol 31 (16) ◽

pp. 2461-2474

Author(s):

Liangxia Duan ◽

Zhenwei Li ◽

Hongxia Xie ◽

Hong Yuan ◽

Zhiming Li ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Carbon Density ◽

Regional Pattern ◽

Soil Organic Carbon Density

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Simulated Soil Organic Carbon Density Changes from 1980 to 2016 in Shandong Province Dry Farmlands Using the CENTURY Model

Sustainability ◽

10.3390/su12135384 ◽

2020 ◽

Vol 12 (13) ◽

pp. 5384

Author(s):

Min Tang ◽

Shihang Wang ◽

Mingsong Zhao ◽

Falyu Qin ◽

Xiaoyu Liu

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Atmospheric Carbon Dioxide ◽

Soil Layer ◽

Co2 Concentration ◽

Shandong Province ◽

Initial Increase ◽

Century Model ◽

Carbon Density ◽

Soil Organic Carbon Density

The changes in cultivated soil organic carbon (SOC) have significant effects on soil fertility and atmospheric carbon dioxide (CO2) concentration. Shandong Province is an important agricultural and grain production area in China. Dry farmland accounts for 74.15% of the province’s area, so studies on dynamic SOC changes would be helpful to understand its contribution to the Chinese national carbon (C) inventory. Using the spatial overlay analysis of the soil layer (1:10,000,000) and the land use layer (1:10,000,000), 2329 dry farmland soil polygons were obtained to drive the CENTURY model to simulate SOC dynamics in Shandong Province from the period 1980 to 2016. The results showed that the CENTURY model can be used to simulate the dry farmland SOC in Shandong Province. From the period 1980 to 2016, the soil organic carbon storage (SOCS) and soil organic carbon density (SOCD) showed an initial increase and then decreased, especially after reaching a maximum in 2009. In 2016, the SOCS was 290.58 × 106 t, an increase of 26.99 × 106 t compared with 1980. SOCD in the dry farmland increased from 23.69 t C ha−1 in 1980 to 25.94 t C ha−1 in 2016. The dry farmland of Shandong Province was a C sink from 1980 to 2016. Among the four soil orders, inceptisols SOCD dominated, and accounted for 47.81% of the dry farmland, followed by >entisols > vertisols > alfisols. Entisols SOCD growth rate was the highest (0.23 t C ha−1year−1). Compared to 1980, SOCD in 2016 showed an increasing trend in the northeast, northwest and southeast regions, while it followed a downward trend in the southwest.

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