Soil Carbon and Nitrogen Stock as Affected by Agricultural Wastes in a Typic Haplusult of Owerri, Southeastern Nigeria

We evaluated the effect of saw dust ash (SDA) and poultry droppings (PD) on soil physico-chemical properties, soil carbon and nitrogen stock and their effects on the growth and yield of okra (Abelmoshus esculentus) on a typic haplusult in Owerri, Imo State Southeastern Nigeria. The experiment was a factorial experiment consisted of saw dust ash applied at the rates of 0, 5 and 10 t/ha and poultry droppings applied at the rates of 0, 5 and 10 t/ha. The treatments were laid out in a randomized complete block design and replicated four times. Results showed that plots amended with 10 t/ha PD + 10 t/ha SDA significantly reduced soil bulk density from 1.37 – 1.07 g/cm3, increased soil total porosity from 48.4 – 59.7% and the percentage of soil weight that is water (soil gravimetric moisture content) was increased by 68.4%. There were significant improvements on soil chemical properties with plots amended with 10 t/ha PD + 10 t/ha SDA recording the highest values on soil organic carbon, soil total nitrogen and exchangeable bases. Plots amended with 10 t/ha PD + 10 t/ha SDA significantly increased soil carbon stock by 24% and soil nitrogen stock by 49.5% more than other treatments. There was significant increase in the growth of okra when compared to the un-amended soil with application of 10 t/ha PD + 10 t/ha SDA increasing the fresh okra pod yield by 78.5%. Significant positive correlation existed between SCS and organic carbon (r = 0.6128), exchangeable Mg (r= 0.5035), total nitrogen (r = 0.6167) and soil pH (r = 0.5221). SNS correlated positively with organic carbon (r = 0.5834), total nitrogen (r= 0.6101) and soil pH (r = 5150). Therefore applications of these agro-wastes are effective in improving soil properties, increasing soil carbon and nitrogen stock. From the results of the work, application of 10 t/ha PD + 10 t/ha SDA which was the treatment combination that improved soil properties and growth performances of okra than other treatments studied is hereby recommended for soil carbon and nitrogen stock improvement and okra production in the region.

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Soil carbon and nitrogen stock of the Japanese agricultural land estimated by the national soil monitoring database (2015–2018)

Soil Science & Plant Nutrition ◽

10.1080/00380768.2021.2000324 ◽

2021 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Kayo Matsui ◽

Yusuke Takata ◽

Yuji Maejima ◽

Hideo Kubotera ◽

Hiroshi Obara ◽

...

Keyword(s):

Soil Carbon ◽

Agricultural Land ◽

Soil Monitoring ◽

Carbon And Nitrogen ◽

Soil Carbon And Nitrogen ◽

Nitrogen Stock

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Species diversity and chemical properties of litter influence non-additive effects of litter mixtures on soil carbon and nitrogen cycling

PLoS ONE ◽

10.1371/journal.pone.0180422 ◽

2017 ◽

Vol 12 (7) ◽

pp. e0180422 ◽

Cited By ~ 2

Author(s):

Bing Mao ◽

Rong Mao ◽

De-Hui Zeng

Keyword(s):

Species Diversity ◽

Soil Carbon ◽

Nitrogen Cycling ◽

Chemical Properties ◽

Additive Effects ◽

Carbon And Nitrogen ◽

Carbon And Nitrogen Cycling ◽

Litter Mixtures ◽

Soil Carbon And Nitrogen ◽

And Chemical Properties

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Soil organic carbon and nitrogen content of density fractions and effect of meadow degradation to soil carbon and nitrogen of fractions in alpine Kobresia meadow

Science in China Series D Earth Sciences ◽

10.1007/s11430-009-0056-5 ◽

2009 ◽

Vol 52 (5) ◽

pp. 660-668 ◽

Cited By ~ 21

Author(s):

WenYing Wang ◽

QiJi Wang ◽

ZiYu Lu

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Nitrogen Content ◽

Soil Carbon ◽

Density Fractions ◽

Carbon And Nitrogen ◽

Soil Carbon And Nitrogen ◽

Kobresia Meadow ◽

Carbon And Nitrogen Content ◽

Meadow Degradation

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Spatial Variability of Soil Organic Carbon and Total Nitrogen in Desert Steppes of China’s Hexi Corridor

Frontiers in Environmental Science ◽

10.3389/fenvs.2021.761313 ◽

2021 ◽

Vol 9 ◽

Author(s):

Xuyang Wang ◽

Yuqiang Li ◽

Yulong Duan ◽

Lilong Wang ◽

Yayi Niu ◽

...

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Soil Carbon ◽

Total Nitrogen ◽

Vegetation Index ◽

Normalized Difference Vegetation Index ◽

Elevation Gradient ◽

Dominant Factor ◽

Desert Steppe ◽

Carbon And Nitrogen

Stock estimates are critical to quantifying carbon and nitrogen sequestration, quantifying greenhouse gas emissions, and understanding key biogeochemical processes (i.e., soil carbon and nutrient cycling). Many studies have assessed soil organic matter and nutrients in different ecosystems. However, the spatial distribution of carbon and nitrogen and the key influencing factors in arid desert steppe remain unclear. Here, we investigated the soil organic carbon (SOC) and soil total nitrogen (STN) to a depth of 100 cm at 126 sites in a desert steppe in northwestern China. SOC and STN contents decreased with increasing depth; the highest average SOC and STN contents were 12.70 and 0.65 g kg−1 in the surface 5 cm, and the lowest were from 80 to 100 cm (4.49 and 0.16 g kg−1, respectively). SOC density (SOCD) and STN density (STND) to a depth of 100 cm averaged 8.94 and 0.45 kg m−2, respectively. The top 1 m of the soils stored approximately 1,041 Tg SOC and 52 Tg STN in the study area. Geostatistical analysis showed strong and moderate spatial autocorrelation for SOCD in different soil layers, but the autocorrelation for STND gradually weakened with increasing depth. SOCD and STND decreased from southwest to northeast in the study area, along an elevation gradient. Both were significantly positively correlated with topographic variables, precipitation, and the normalized-difference vegetation index, but negatively correlated with temperature and aridity. More than 40% of the SOCD and STND spatial variation was explained by elevation, which was the dominant factor. The data and high-resolution maps from this study will support future soil carbon and nitrogen analyses.

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