Effects of elevated O3 on soil respiration in a winter wheat - soybean rotation cropland

Soil Research ◽  
2012 ◽  
Vol 50 (6) ◽  
pp. 500 ◽  
Author(s):  
Shutao Chen ◽  
Yong Zhang ◽  
Haishan Chen ◽  
Zhenghua Hu
Keyword(s):  
Soil Respiration ◽  
Winter Wheat ◽  
Growing Season ◽  
Co2 Production ◽  
Soil Co2 ◽  
Production Rates ◽  
Elevated O3 ◽  
Respiration Rates ◽  
Nitrification And Denitrification ◽  
Soil Co2 Production

The increasing tropospheric ozone (O3) concentration has been reported to have negative effects on ecosystems. However, few investigations have focussed on the impacts of elevated O3 on soil respiration in cropland. This study aimed to examine the responses of soil respiration to elevated O3 with open-top chambers (OTCs) in a winter wheat (Triticum aestivum L.)–soybean (Glycine max (L.) Merr) rotation. The experiment was performed in the cropland near Nanjing city, south-east China. Seasonal changes in soil respiration rates, soil CO2 production rates, and nitrification and denitrification rates in ambient air (control) and elevated O3 (100 ppb) treatments were investigated in the 2009–10 winter wheat and 2010 soybean growing seasons. Seasonal mean soil respiration rates for the control and 100 ppb treatments were 3.16 and 2.66 μmol/m2.s, respectively, in the winter wheat growing season, and they were 3.59 and 2.51 μmol/m2.s, respectively, in the soybean growing season. Mean soil respiration rate in the control was ~29% higher than that in the 100 ppb treatment across the whole winter wheat–soybean rotation season. Elevated O3 significantly decreased soil respiration in both crops, with a larger effect observed in soybean. Mean soil CO2 production rates were reduced by ~42% in the 100 ppb O3 treatment compared with the control. No O3 effects were observed on soil nitrification and denitrification during the period monitored. A further analysis of covariance showed that soil respiration was significantly correlated with both soil temperature and moisture, and no interaction effects of O3 treatment and covariate (temperature or moisture) were observed.

scholarly journals The Effect of Soil Coverings on Soil Respiration in Sandy Soil

2003 ◽  
pp. 21-25
Author(s):  
Csaba Varga
Keyword(s):  
Soil Respiration ◽  
Moisture Content ◽  
Sandy Soil ◽  
The Other ◽  
Co2 Production ◽  
Favourable Effect ◽  
Control Soil ◽  
Soil Co2 ◽  
The Difference ◽  
Soil Co2 Production

The purpose of our experiments is to study effect of different soil coverings (porous black polyethylene called agroszövet and black polyethylene) on CO2 production in sandy soil. The CO2 production was measured in our laboratory according to Witkamp (1966 cit. Szegi, 1979), after 5 days’ incubation period. Samples were taken off four times (March, May, July, September) in every year of the experiment. In May, July and September of 2000, the CO2 production was significantly higher in the control than in the treatment soil. With the exception of September, the value of CO2 production was significantly higher under black polyethylene than under agroszövet. In March and May of 2001, the soil under black polyethylene, and in July and September the control soil produced the greatest quantity of CO2. With the exception of July, significantly more CO2 was produced under black polyethylene than under agroszövet. To study the dynamic of CO2 production there was find a significantly higher value May and September of 2001 than 2000. Similarly significant higher CO2 production was detected in September than in the other months In average of two experimental years the difference between the produced CO2 under different coverings was occasionally. Explicit upward tendency in soil CO2 production was detected only in case of control soil. There was a medium (r=0,413) relationship observed between the moisture content and the CO2 producing ability of soil. To sum up the soil coverings had favourable effect on soil CO2 production very rearly, but they could help to conserve the moisture content of soil.

scholarly journals Inversely Estimating the Vertical Profile of the Soil CO2 Production Rate in a Deciduous Broadleaf Forest Using a Particle Filtering Method

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0119001 ◽  
Author(s):  
Gen Sakurai ◽  
Seiichiro Yonemura ◽  
Ayaka W. Kishimoto-Mo ◽  
Shohei Murayama ◽  
Toshiyuki Ohtsuka ◽  
...  
Keyword(s):  
Production Rate ◽  
Particle Filtering ◽  
Vertical Profile ◽  
Co2 Production ◽  
Soil Co2 ◽  
Broadleaf Forest ◽  
Filtering Method ◽  
Soil Co2 Production ◽  
Deciduous Broadleaf Forest

Analysis of Observed and DNDC Modeled Soil Respiration of Winter Wheat in Guanzhong Plain

2014 ◽  
Vol 1073-1076 ◽  
pp. 1216-1221
Author(s):  
Xiao Long Zhang ◽  
Xue Yang ◽  
Kai Di Tian ◽  
Bing Shen ◽  
Quan Quan
Keyword(s):  
Seasonal Variation ◽  
Soil Respiration ◽  
Winter Wheat ◽  
Significant Variation ◽  
Root Respiration ◽  
Growing Season ◽  
Dndc Model ◽  
Experimental Station ◽  
Soil Heterotrophic Respiration ◽  
Planting Season

The application of the DeNitrification-DeComposition (DNDC) model in soil respiration of winter wheat at the Ecological Experimental Station of Fuping County, China is researched for the year 2013-2014. The applied results indicate that DNDC is available to research soil respiration in cropland agroecosystems of Guanzhong Plain, China. Also the cumulative and seasonal variation emissions of soil respiration and components (root respiration, soil heterotrophic respiration) are estimated. Based on the simulated results, it can be seen that a significant variation appears in winter wheat growing season, where a downward trend starts from planting season to wintering season, and a steady low level at about 8.3 kg C·hm-2·d-1 keeps until the overwintering, then a significant upward to harvest, where the top point is almost 101.84 kg C·hm-2·d-1, with the total amount is 8342.35 kg C·hm-2. The seasonal amount of root respiration is 5345.47 kg C·hm-2, occupies 61.1% of soil respiration emissions.

Effects of sieving on estimations of microbial biomass, and carbon and nitrogen mineralization, in soil under pasture

Soil Research ◽  
1985 ◽  
Vol 23 (2) ◽  
pp. 319 ◽  
Author(s):  
DJ Ross ◽  
TW Speir ◽  
KR Tate ◽  
VA Orchard
Keyword(s):  
Microbial Biomass ◽  
Biochemical Properties ◽  
Co2 Production ◽  
Soil Co2 ◽  
Mineral N ◽  
Carbon And Nitrogen ◽  
Four Seasons ◽  
Net Mineralization ◽  
Biochemical Indices ◽  
Soil Co2 Production

Biochemical indices of microbial biomass and other biochemical properties of a Typic Haplaquoll, sampled under pasture over four seasons, were compared in intact cores and soil sieved through a 6 mm and a 2 mm mesh. Sieving had an inconsistent influence on biomass C estimates, which tended, however, to be higher in <2 mm-mesh than in <6 mm-mesh soil. Sieving had no deleterious effect on mineral-N flush values, and no significant effect on biomass P, and generally adenosine 5'-triphosphate (ATP), contents. Judged by the values of biomass C/ATP and biomass C/mineral-N flush ratios, the biomass C estimates of winter samples, collected under water-logged conditions, were unrealistically low, particularly in sieved soil. CO2 production by soil at a standardized water potential tended to be lowest in <2 mm-mesh samples. In contrast, net mineralization of N, in all except the winter <2 mm-mesh soil, was highest in sieved soil, as generally were extractable inorganic and organic P contents. Overall, sieving is considered preferable to the use of intact cores for measurements of these biochemical properties in soil under pasture.

scholarly journals Contribution of Winter Wheat and Barley Cultivars to Climate Change via Soil Respiration in Continental Croatia

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2127
Author(s):  
Darija Bilandžija ◽  
Željka Zgorelec ◽  
Nikola Bilandžija ◽  
Zvonimir Zdunić ◽  
Tajana Krička
Keyword(s):  
Climate Change ◽  
Soil Respiration ◽  
Winter Wheat ◽  
Seasonal Pattern ◽  
Morphological Characteristics ◽  
Bare Soil ◽  
Total Carbon ◽  
Barley Cultivars ◽  
Respiration Rates ◽  
Significant Difference

Agricultural greenhouse gas emissions can be reduced by the cultivation of cultivars with lower carbon footprint. Considering the hypothesis that there are differences in soil respiration, due to differences in physiological and morphological characteristics of wheat and barley, the aim of this study is an assessment of soil respiration rates and microclimate under different cover (bare soil, wheat, and barley) and cultivar (four barley and four wheat) types. Soil respiration was determined by in situ closed static-chamber method in continental Croatia, during the 2020/2021 season. The seasonal pattern of the soil respiration was similar for all cultivars, respiration was increasing with crop development stages until maturity, when it decreased until the harvest. Cover type did not have influence on soil microclimate but did have on soil respiration. Bare soil had significantly lower annual respiration rates, compared to the barley/wheat covers. Average annual respiration rates were similar between the barley and wheat covers, as well as between all studied barley cultivars. A significant difference between winter wheat cultivars have only been determined between the Renata (9.78 kg C-CO2 ha−1 day−1) and El Nino (12.67 kg C-CO2 ha−1 day−1) cultivars. However, the determination of the total carbon budget is needed, in order to determine the most suitable cultivar, in the light of climate change.

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