Seasonal changes of microbial biomass carbon related to climatic factors in soils from karst areas of southwest China

Piao, He-Chun; Hong, Youwei; Yuan, Zi‐Qiang

doi:10.1007/s003740050006

Cited by 43 publications

(29 citation statements)

References 22 publications

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“…The SOM and POXC, which are indicators of the soil organic carbon, were the highest in winter and fall, and may have accumulated because of a low soil temperature, lack of soil disturbance that would expose the organic matter to oxidation, and lower microbial activity resulting in less consumption of soil organic products for energy. This result is confirmed by other studies that have found a significantly higher SOM and microbial biomass carbon in winter compared with summer [10,11]. Although the decomposition rate is slower during this period, the enzyme and microbial activities in early fall, and the plant carbon inputs and litter chemistry in winter may have increased the soil's carbon concentration [26][27][28].…”

Section: Sampling Season Effectssupporting

confidence: 80%

“…In addition, soil measurements that are highly variable during the season would be unsuitable as indicators of soil quality [11]. Some of the most variable indicators in this study, including NO3-N and Zn (CV of 47% and 101% respectively), are measurements that were significantly impacted by the application of fertilizers, especially in cotton and pecans.…”

Section: Implications Of This Studymentioning

confidence: 99%

“…Previous studies have shown the variability that could exist, as soil quality indicators are sampled during the different months of the year within a given growing season [8][9][10][11]. Moebius et al [8] studied the temporal variations of many soil physical quality indicators within a season, in different tillage and crop rotation trials, and found that the indicators vary significantly with the sampling dates and in the different soil types.…”

Section: Introductionmentioning

confidence: 99%

“…Moebius et al [8] studied the temporal variations of many soil physical quality indicators within a season, in different tillage and crop rotation trials, and found that the indicators vary significantly with the sampling dates and in the different soil types. Piao et al [11] studied the seasonal response of soil to microbial biomass carbon. They found an inverse relation between the soil microbial biomass carbon and the atmospheric temperature over one year of sampling.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

et al. 2018

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Abstract:Improving the soil quality in arid agro-ecosystems requires a greater understanding of how the time-of-sampling and management affect the soil measurements. We evaluated the selected soil quality indicators on samples collected at a 0-0.15 m depth, and at various sampling dates of the year, corresponding to the fall of 2015, winter of 2015/2016, spring of 2016, and the summer of 2016. The three crop management systems sampled included alfalfa (Medicago sativa), upland cotton (Gossypium hirsutum), and pecan (Carya illinoinensis). The soil properties measured included the wet aggregate stability (WAS), mean weight diameter of dry aggregates (MWD), dry aggregates greater than 2 mm (AGG >2 mm), dry aggregates less than 0.25 mm (AGG <0.25 mm), available water capacity (AWC), soil organic matter (SOM), permanganate oxidizable carbon (POXC), soil bulk density (BD), soil electrical conductivity (EC), pH, nitrate-nitrogen (NO3-N), extractable potassium (K), extractable phosphorus (P), calcium (Ca), magnesium (Mg), sodium adsorption ratio (SAR), and micronutrients (zinc, iron, copper, and manganese). Out of the 21 soil measurements, 15 varied significantly with the time-of-sampling within a year, although there were no consistent trends in variability. However, only a few measurements differed significantly with the crop management practices tested. Wet aggregate stability, MWD, AWC, and BD were significantly higher in the summer, while POXC and SOM were significantly higher in the fall and winter, respectively. Soil quality indicators such as NO3-N, K, and P decreased significantly during the spring. This study shows that the seasonal variability of the soil measurements can be significant in the arid agro-ecosystems, with the magnitude of variation depending on the measurement type. The soil managers in the region need to account for this variability, in order to be able to assess the changes in the soil quality. Also, because of the variability that can occur across the different sampling dates within a year, it is advisable to sample during the same period every year, for a consistent interpretation of the directional changes of the soil quality indicators.

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Section: Sampling Season Effectssupporting

confidence: 80%

Section: Implications Of This Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

et al. 2018

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“…Therefore, dissolved soil organic carbon is intensively related to soil microbial biomass (Matlou and Haynes, 2006). Piao et al (2000) found soil microbial biomass was negatively correlated with extractable DOC by K 2 SO 4 solution. Mo et al (2004Mo et al ( , 2006 had shown that nitrogen addition significantly inhibited litter decomposition in the MEBF, which confirms that extractable DOC increases with the addition of nitrogen to the MEBF.…”

Section: Effects Of N Deposition On Forest Soil Organic Carbon Sequesmentioning

confidence: 98%

Effects of elevated nitrogen deposition on soil microbial biomass carbon in major subtropical forests of southern China

Wang

et al. 2009

Front. For. China

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Spatial heterogeneity of soil organic carbon in a karst region under different land use patterns

2020

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Citation: Zhang, Z., X. Huang, and Y. Zhou. 2020. Spatial heterogeneity of soil organic carbon in a karst region under different land use patterns. Ecosphere 11(3):Abstract. Using the grid-based sampling method, 2755 soil profiles consisting of 22,057 soil samples were sampled and analyzed to study the spatial distribution and storage of soil organic carbon (SOC) in the Houzhai River Basin in Guizhou Province, a typical karst region in southwestern China. The results suggest that the total levels of SOC stored in the 0-10, 0-20, 0-30, and 0-100 cm soil layers of the Houzhai River Basin are approximately 1.48 9 10 8 , 2.65 9 10 8 , 3.44 9 10 8 , and 5.39 9 10 8 kg C, respectively. SOC content and soil bulk density levels were found to vary depending on the land use. In the 0-50 cm soil layer, forest SOC content levels (including arbor forests, arbor-shrub mixed forests, shrubland, and shrub grassland) are generally higher than those of uncultivated land, followed by grassland and cropland (including paddy fields, arid land, sloping cropland, and abandoned cropland), gardens, and orchard. It is believed that land use is a vital factor directly affecting carbon storage patterns in the study area. Soil thickness, rock outcrop, and slope gradients are the main factors in arrangement of land use by local governments and peasants. This study has established a feasible method for assessment of SOC stock in karst mountainous areas. The findings of this study are applicable to other karst mountainous regions globally.

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Seasonal changes of microbial biomass carbon related to climatic factors in soils from karst areas of southwest China

Cited by 43 publications

References 22 publications

Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

Seasonal Changes of Soil Quality Indicators in Selected Arid Cropping Systems

Effects of elevated nitrogen deposition on soil microbial biomass carbon in major subtropical forests of southern China

Spatial heterogeneity of soil organic carbon in a karst region under different land use patterns

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