Effects of land management on CO2 flux and soil C stock in two Tanzanian croplands with contrasting soil texture

Sugihara, Soh; Funakawa, Shinya; Kilasara, Method; Kosaki, Takashi

doi:10.1016/j.soilbio.2011.10.013

Cited by 51 publications

(45 citation statements)

References 54 publications

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“…Feiziene et al (2011), in an 11 year experiment on different management systems, observed that CO 2 emission rates were 13 % higher in treatments under no-till in sandy soil compared with clay soil. Sugihara et al (2012) also observed lower efficiency in converting C from plant residues into SOM in a sandy soil compared with a clay soil, which indicates a high probability of loss of C-CO 2 in soils with low clay contents. In addition to the greater capacity to store carbon in the soil, low CO 2 emission in the TR experiment, even with high C/N plant residues, can be due to low macroporosity also (Calonego and Rosolem, 2010), limiting gas exchange and soil respiration.…”

Section: Effect Of Crop Residues On Ecomentioning

confidence: 85%

Cover crop rotations in no-till system: short-term CO2 emissions and soybean yield

Rigon

Calonego

Rosolem

et al. 2018

Sci. agric. (Piracicaba, Braz.)

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In addition to improving sustainability in cropping systems, the use of a spring and winter crop rotation system may be a viable option for mitigating soil CO 2 emissions (ECO 2 ). This study aimed to determine short-term ECO 2 as affected by crop rotations and soil management over one soybean cycle in two no-till experiments, and to assess the soybean yields with the lowest ECO 2 . Two experiments were carried out in fall-winter as follows: i) triticale and sunflower were grown in Typic Rhodudalf (TR), and ii) ruzigrass, grain sorghum, and ruzigrass + grain sorghum were grown in Rhodic Hapludox (RH). In the spring, pearl millet, sunn hemp, and forage sorghum were grown in both experiments. In addition, in TR a fallow treatment was also applied in the spring. Soybean was grown every year in the summer, and ECO 2 were recorded during the growing period. The average ECO 2 was 0.58 and 0.84 g m 2 h −1 with accumulated ECO 2 of 5,268and 7,813 kg ha -1 C-CO 2 in TR and RH, respectively. Sunn hemp, when compared to pearl millet, resulted in lower ECO 2 by up to 12 % and an increase in soybean yield of 9% in TR. In RH, under the winter crop Ruzigrazz+Sorghum, ECO 2 were lower by 17%, although with the same soybean yield. Soil moisture and N content of crop residues are the main drivers of ECO 2 and soil clay content seems to play an important role in ECO 2 that is worthy of further studies. In conclusion, sunn hemp in crop rotation may be utilized to mitigate ECO 2 and improve soybean yield.

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Section: Effect Of Crop Residues On Ecomentioning

confidence: 85%

Cover crop rotations in no-till system: short-term CO2 emissions and soybean yield

Rigon

Calonego

Rosolem

et al. 2018

Sci. agric. (Piracicaba, Braz.)

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“…In humid areas (A dM > 50, Table ), however, drying poses a stress situation to soil microbes, which may not be adapted to low moisture contents and consequently may die during drying and re‐wetting (Zornoza et al ., ). Nonetheless, the simulated precipitation resulted in significantly different CO 2 effluxes, which are similar to trends observed in field measurements (Iqbal et al ., ; Abera, ), and our CO 2 efflux values are in general comparable with other studies (Nouvellon et al ., ; Sugihara et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Land Use and Precipitation Affect Organic and Microbial Carbon Stocks and the Specific Metabolic Quotient in Soils of Eleven Ecosystems of Mt. Kilimanjaro, Tanzania

et al. 2015

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Tropical ecosystems are under increasing pressure of land‐use changes, strongly affecting the carbon cycle. Conversion from natural to agri‐cultural ecosystems is often accompanied by a decrease in the stocks of organic and microbial carbon (Corg, Cmic) as well as changes in microbial activity and litter decomposition. Eleven ecosystems along an elevation gradient on the slopes of Mt. Kilimanjaro were used to investigate impacts of land‐use changes on Corg and Cmic stocks as well as the specific metabolic respiration quotient (qsCO2) in surface soils. Six natural, two semi‐natural and three intensively used agricultural ecosystems were investigated on an elevation gradient from 950 to 3,880 m asl. To estimate the effects of precipitation, rainfall regimes of 3·6 and 20·0 mm were simulated. Corg stocks were controlled by water availability, temperature and net primary production. Agricultural management resulted in decreases of Corg and Cmic stocks by 38% and 76%, respectively. In addition, agricultural systems were characterized by low Cmic:Corg ratios, indicating a decline in available substrate. Enhanced land‐use intensity leads to increased qsCO2 (agricultural > semi‐natural > natural). The traditional homegardens stood out as a sustainable land‐use form with high substrate availability and microbial efficiency. Soil CO2 efflux and qsCO2 generally increased with precipitation level. We conclude that soils of Mt. Kilimanjaro's ecosystems are highly sensitive to land‐use changes and are vulnerable to changes in precipitation, especially at low elevations. Even though qsCO2 was measured under different water contents, it can be used as an indicator of ecosystem disturbances caused by land‐use and management practices. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Coarse-textured soil in this area also led to low soil water holding capacity and good soil water infiltration, reducing the microbial population and enzymatic activity [57]. All of these factors would consequently lead to lower soil respiration [58].…”

Section: Forest Type and Soil Respirationmentioning

confidence: 92%

Soil Respiration at Different Stand Ages (5, 10, and 20/30 Years) in Coniferous (Pinus tabulaeformis Carrière) and Deciduous (Populus davidiana Dode) Plantations in a Sandstorm Source Area

Zhao

Zhang

et al. 2016

Forests

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Understanding the effects of stand age and forest type on soil respiration is crucial for predicting the potential of soil carbon sequestration. Thus far, however, there is no consensus regarding the variations in soil respiration caused by stand age and forest type. This study investigated soil respiration and its temperature sensitivity at three stand ages (5, 10, and 20 or 30 years) in two plantations of coniferous (Pinus tabulaeformis Carrière) and deciduous (Populus davidiana Dode) species using an automated chamber system in 2013 in the Beijing-Tianjin sandstorm source area. Results showed that mean soil respiration in the 5-, 10-, and 20/30-year-old plantations was 3.37, 3.17, and 2.99 µmol¨m´2¨s´1 for P. tabulaeformis and 2.92, 2.85, and 2.57 µmol¨m´2¨s´1 for P. davidiana, respectively. Soil respiration decreased with stand age for both species. There was no significant difference in soil respiration between the two plantation species at ages 5 and 10 years (p > 0.05). Temperature sensitivity of soil respiration, which ranged from 1.85-1.99 in P. tabulaeformis and 2.20-2.46 in P. davidiana plantations, was found to increase with stand age. Temperature sensitivity was also significantly higher in P. davidiana plantations and when the soil water content was below 12.8%. Temperature sensitivity incorporated a combined response of soil respiration to soil temperature, soil water content, soil organic carbon, and fine root biomass and, thus, provided an ecological metric for comparing forest carbon dynamics of these species.

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Effects of land management on CO2 flux and soil C stock in two Tanzanian croplands with contrasting soil texture

Cited by 51 publications

References 54 publications

Cover crop rotations in no-till system: short-term CO2 emissions and soybean yield

Cover crop rotations in no-till system: short-term CO2 emissions and soybean yield

Land Use and Precipitation Affect Organic and Microbial Carbon Stocks and the Specific Metabolic Quotient in Soils of Eleven Ecosystems of Mt. Kilimanjaro, Tanzania

Soil Respiration at Different Stand Ages (5, 10, and 20/30 Years) in Coniferous (Pinus tabulaeformis Carrière) and Deciduous (Populus davidiana Dode) Plantations in a Sandstorm Source Area

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