Effect of Tillage Practices and Rice Straw Management on Soil Environment and Carbon Dioxide Emission

Rahman²,

et al. 2019

SAARC J Agric

Under the changing climate documentation of soil carbon and nutrients is indispensable for sustainable crop production which is scarce in the agro-ecological zone (AEZ) of Northern and Eastern Piedmont Plains in Bangladesh. Therefore, the study was conducted collecting and analyzing a total of 240 soil samples considering 0-20 cm soil depth from two upazilas viz. Purbadhola and Akhaura under the mentioned AEZ to quantity carbon stock and nutrient contents of soils. Organic carbon stocks in soils of Purbadhola and Akhaura upazila were 45.97 and 97.04 Gg, respectively, while in the Northern and Eastern Piedmont Plains was 8.56 Tg. The soil pH was very strongly acidic to slightly acidic (4.4-5.8), organic carbon contents (0.53-1.31%) were very low to medium, while the overall soil fertility rated as very low to medium. Balanced fertilization using organic and inorganic sources in general and liming for upland crops might improve fertility and productive capacity of soils in the study area. The study opens up avenues to find out means and ways of increasing carbon contents in soils of Northern and Eastern Piedmont Plains and might help the policy makers to debate on future global carbon trading issues. SAARC J. Agri., 16(2): 61-72 (2018)

Section: Carbon Stock In Soils Of Purbadhola and Akhaura Upazila And mentioning

confidence: 99%

Assessment of carbon stock and nutrient contents in soils of Northern and Eastern piedmont plains of Bangladesh

Rahman²,

et al. 2019

SAARC J Agric

Int.J.Curr.Microbiol.App.Sci

“…Water imponding and no water imponding were not much differed in emission of CO 2 from field throughout crop period and observed higher emission in initial first 15 days after transplanting which was higher with water imponding of 40 days, 10 days after transplanting (2465.31 g day -1 ha -1 ) being at par to hand weeding twice (2409.14 g day -1 ha -1 ) and no water imponding (2284.81 g day -1 ha -1 ) (Table 4). Rahman et al, (2017) observed that reduced tillage also can play an important role in accumulating carbon in the soil. The soil is a major source of emission for atmospheric CO 2 content.…”

Section: Effect Of Agronomical Manipulations On Co 2 Emissionmentioning

confidence: 99%

Effect of Agronomical Manipulations on Carbon Dioxide Emission from Transplanted Rice (Oryza sativa L.) Field under Midland

Kumar¹,

Pradhan²,

Chandrakar³

et al. 2019

Block Design) with four replications. The treatment combinations were Ambika paddy weeder at 20 and 40 day after transplanting, Bispyribac-sodium @ 80g ha -1 at 15 day after transplanting, hand weeding twice at 20 and 40 day after transplanting, water imponding of 40 days, 10 days after transplanting, no water imponding alongwith one control (no weeding). Plant height, LAI at 60 DAT, Tiller hill -1 , Panicle hill -1 , Penicle length (cm), Grains panicle -1 , CGR (g plant -1 day -1 ) at 60-90 DAT, RGR (g plant -1 day -1 ) at 60-90 DAT were recorded higher value in hand weeding twice @ 20 and 40 days after transplanting than remaining treatments except bispyribac-sodium @ 80 g ha -1 at 15 DAT which was at par to that of hand weeding twice. Maximum number of panicle hill -1 , panicle length, seeds panicle -1 , and test weight were recorded with hand weeding twice @ 20 and 40 days after transplanting which was significantly superior over rest of treatments, being on par to application of bispyribac-sodium @ 80 g ha -1 at 15 days after transplanting. Hand weeding twice at 20 and 40 days after transplanting produced significantly higher grain yield (42.79 q ha -1 ) than rest of treatments except application of bispyribac-sodium @ 80 g ha -1 at 15 days after transplanting (40.31 q ha -1 ) which were 40.94% and 32.77% increased in yield over control. Among the treatments, the highest quantity of CO2 emission from rice field was with hand weeding twice at 20 and 40 DAT (2465.31 g day -1 ha -1 ) at 35 DAT and the lowest was recorded when applied bispyribacsodium @ 80 g ha -1 at 15 DAT (202.98 g day -1 ha -1 ) at 45 DAT, which was highest and lowest level of agronomical manipulations in respective treatments reflecting on emission.

“…Management of home garden in the form of tillage, mulching, and soil compaction may be another driving force for C exchange 48 – 50 . The variation in SOC stock is influenced by addition and removal of biomass due to management activities, an underlying processes in the soil 51 , 52 .…”

Section: Introductionmentioning

confidence: 99%

Carbon stocks of homestead forests have a mitigation potential to climate change in Bangladesh

Baul

Peuly

Nandi

et al. 2021

Sci Rep

A total of 176 homestead forests at three altitudes in the Chittagong Hill Tracts, Bangladesh were randomly surveyed to estimate carbon (C) stocks and how stand structure affects the biomass C. All woody vegetations were measured, and litter and soil (0–30 cm depth) were sampled. The tree biomass C stock in the top two altitude forests was up to 37–48% higher than in low altitude, owing to significantly higher tree density and species diversity. An increase in species diversity index by one unit increased the biomass stock by 23 Mg C ha−1. The C stock of litterfall in low altitude forests was 22–28% higher than in the top two altitude due to the deposition of litters downslope and deliberate use of mulch for soil improvement and conservation, resulting in up to 5% higher total soil C. The topsoil C was 10–25% higher than the deeper soil, depending on the altitude. The forest stored 89 Mg C ha−1, indicating a potential for C sequestration in trees outside forest. This study would help policymakers to strengthen the recognition of small-scale forests for mitigation in REDD + (reducing emissions from deforestation and forest degradation, the role of conservation, sustainable management of forests, and enhancement of forest carbon stocks) and support owners through C credits from sustainably managed forests.