สืบค้นงานวิจัย
Comparison of Carbon Budget in Paddy Field with Different Cultivation Practices
Tassanee Jiaphasu-anan - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Comparison of Carbon Budget in Paddy Field with Different Cultivation Practices
ผู้แต่ง / หัวหน้าโครงการ (EN): Tassanee Jiaphasu-anan
บทคัดย่อ (EN): Rice cultivation in flooded ecosystems emits approximately 13 percent of the national total of greenhouses gases (GHG) in Thailand. Common cultivation practices often deal with field burning of rice straw to ease land preparation before tillage. In order to abate the air pollution occurred from straw burning, Thai government has launched the policy to prohibit rice straw burning while promote incorporated rice straw as the alternative. It is known that high organic amendment in the field increases methane emission. However, long term impact on soil carbon storage of these straw management is still an unclear issue. This studies deals with the approach to control methane and nitrous oxide emission in the controversial rice straw management with co-activities of draining water system during flowering period and looks at its soil carbon change using two consecutive crops carbon budget estimation. The experimental design consisted of rice straw burning (B), stubble incorporated (S) and rice straw and stubble incorporated (I) plots applied with two different water drainage period, local (vegetative period) and mid-season (vegetative and flowering period) drainage. The experiment was conducted in rice fields located in Samutsakorn province, in the central part Thailand, throughout the first and the second crop seasons in 2007. Although the rice yield of first and second crops were different due to the seasonal cultivation and disturbance of weedy rice, pattern of seasonal methane flux were in the same manner. The effect of rice straw incorporate showed higher methane emission in both first and second crops (18.03 and 20.07 gCH4/m2 in I plot) while lower emission were recorded from burning plots (15.63 and 6.84 gCH4/m2 in B plot). Application of water drainage during flowering period of unburned rice fields (S and I plot) lead to significant amount of emission reduction particularly in the second crop. The total GHGs reduction from the drainage in rice cultivation were 23.83%, 14.51% and 10.98% in S, I and B plots, respectively. The results suggested that mitigation in the organic amendment field can be persuaded by applying water drainage at suitable cultivation period. However, drainage did not show strong effect on nitrous oxide reduction. This paper recommends rice cultivation with stubble incorporated with mid-season drainage as the suitable cultivation practice for methane mitigation and rice production. Regardless to effect of water drainage, carbon mass balance during the two cultivation was established for carbon budget in stubble plot (S), burning plot (B), straw and stubble incorporate plot (I). Results showed that repeating incorporate residues tend to increase the potential for carbon storage in soil as seen in the carbon budgets of I plot which was negative in first crop and then step up positive value in second crop (-52 and 9 gC/m2) On the other hand, those burning field ( B plot) carbon budget showed negative value with both crops (-180 gC/m2 and -150 gC/m2, respectively), which indicated more carbon loss from the soil than unburned practice. Consequently, in order to maintain sustainable cultivation of rice field with straw management, it is recommended to consider not only CH4 emissions, but also the potential of the carbon budget.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): http://dcms.thailis.or.th/dcms/dccheck.php?Int_code=54&RecId=13414&obj_id=37896
เผยแพร่โดย (EN): มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
คำสำคัญ (EN): CH4 emission
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
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Tassanee Jiaphasu-anan. "Comparison of Carbon Budget in Paddy Field with Different Cultivation Practices". ไม่ระบุหน่วยงาน. ม.ป.ป.

Tassanee Jiaphasu-anan. "Comparison of Carbon Budget in Paddy Field with Different Cultivation Practices". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Comparison of Carbon Budget in Paddy Field with Different Cultivation Practices
Tassanee Jiaphasu-anan
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี
ไม่ระบุวันที่เผยแพร่
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