scholarly journals Methane emission from a flooded rice field under pre-germinated system

2019 ◽  
Vol 49 (11) ◽  
Author(s):  
Magda Aparecida de Lima ◽  
Rosana Faria Vieira ◽  
Rosa Toyoko Shiraishi Frighetto ◽  
Alfredo José Barreto Luiz ◽  
Omar Vieira Villela
Keyword(s):  
Methane Emission ◽  
Flow Measurement ◽  
Gas Flow ◽  
Rice Field ◽  
Ch4 Emission ◽  
Global Level ◽  
Irrigated Rice ◽  
Rice Plantation ◽  
Flooding Period ◽  
Flooded Rice Field

ABSTRACT: Local greenhouse gas flow measurement studies have been encouraged at a global level as a subsidy for national and state inventories. This study aimed to evaluate the seasonal methane emission during the 2008/2009 harvest, from an irrigated rice plantation, under pre-germinated system, in the municipality of Tremembé, State of São Paulo, using the static chamber technique and gas chromatography. The study showed high seasonal emission of methane (CH4) for the studied area, probably due to the long flooding period. It was estimated the CH4 emission factor (6.2 kg CH4 ha-1 dia-1), the partial global warming potential (pGWP, 26.2 Mg CO2eq growing season-1 ha-1) and the yield-scaled pGWP (YpGWP, 3.9 kg CO2eq kg grain).

Effect of the herbicide butachlor on methane emission and ebullition flux from a direct-seeded flooded rice field

2001 ◽  
Vol 33 (3) ◽  
pp. 175-180 ◽  
Author(s):  
S. R. Mohanty ◽  
K. Bharati ◽  
B. T. S. Moorthy ◽  
B. Ramakrishnan ◽  
V. R. Rao ◽  
...  
Keyword(s):  
Methane Emission ◽  
Rice Field ◽  
Flooded Rice ◽  
Direct Seeded ◽  
Flooded Rice Field

scholarly journals Methane emission and dynamics of methanotrophic and methanogenic communities in a flooded rice field ecosystem

2014 ◽  
Vol 88 (1) ◽  
pp. 195-212 ◽  
Author(s):  
Hyo Jung Lee ◽  
Sang Yoon Kim ◽  
Pil Joo Kim ◽  
Eugene L. Madsen ◽  
Che Ok Jeon
Keyword(s):  
Methane Emission ◽  
Rice Field ◽  
Flooded Rice ◽  
Field Ecosystem ◽  
Flooded Rice Field

scholarly journals Pendugaan Emisi Metana pada Sistem Pengelolaan Tanaman Padi di Kabupaten Minahasa (The Estimation of Methane Emission in The Rice Management System in Minahasa Rregency)

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Susan Marlein Mambu
Keyword(s):  
Methane Emission ◽  
Rice Fields ◽  
Soil Types ◽  
Wetland Rice ◽  
Calculation Formula ◽  
Ch4 Emission ◽  
Irrigated Rice ◽  
Ch4 Emissions ◽  
Ch4 Production ◽  
Over Time

AbstrakPemanasan bumi secara global karena emisi gas rumah kaca ke atmosfir yang disebabkan oleh kegiatan manusia, cenderung mengalami peningkatan dari waktu ke waktu. Pertanian padi sawah, khususnya sawah teririgasi juga merupakan penyumbang terbesar gas metana ke atmosfer. Oleh karena itu, perlu adanya upaya pengurangan emisi CH4 dari kegiatan budidaya tanaman padi sawah. Penelitian dilakukan untuk mengetahui emisi CH4 dari budidaya padi sawah di kabupaten Minahasa, dengan melakukan estimasi emisi CH4 menggunakan model perhitungan formula untuk estimasi emisi CH4 pada padi sawah. Hasil penelitian ini memberikan informasi keberadaan CH4 dan jumlah produksi emisi CH4 dari lahan padi sawah di Kabupaten Minahasa, yang cenderung mengalami peningkatan dari tahun ke tahun (data tahun 2002 – 2010). Peningkatan emisi CH4 dari lahan padi sawah di Kabupaten Minahasa disebabkan oleh beberapa faktor yaitu luas panen, jenis tanah, jenis varietas, jenis pengairan dan kegiatan budidaya lainnya seperti pemupukan dan pemberian bahan organik (jerami).Kata kunci: emisi metana, padi sawahAbstractGlobal warming from greenhouse gas emissions to the atmosphere that is caused by human activities tends to be increased over time. Fields of wetland rice, particularly irrigated rice, are also the largest contributor to methane gas to the atmosphere. Therefore, CH4 emissions should be reduced from paddy rice cultivation. This research aimed to measure the production of CH4 emission in the wetland rice fields of Minahasa, using a model calculation formula to estimate CH4 emissions in the rice fields. The results informed the existence and the amount of CH4 production resulted from wetland rice fields in Minahasa, which tended to be increased from year to year (data of year 2002 to 2010). The increment of CH4 emission from wetland rice fields in Minahasa was caused by several factors, i.e. the harvested area, soil types, types of variety, types of irrigation and other cultivation activities such as fertilization and providing organic material (straw).Keywords: methane emission, wetland rice

Options for mitigating methane emission from a permanently flooded rice field

2002 ◽  
Vol 9 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Zucong Cai ◽  
Haruo Tsuruta ◽  
Ming Gao ◽  
Hua Xu ◽  
Chaofu Wei
Keyword(s):  
Methane Emission ◽  
Rice Field ◽  
Flooded Rice ◽  
Flooded Rice Field

Invariant method for measuring wet gas flow rate

2021 ◽  
pp. 13-19
Author(s):  
Zhanat А. Dayev ◽  
Gulzhan E. Shopanova ◽  
Bakytgul А. Toksanbaeva
Keyword(s):  
Flow Rate ◽  
Measurement System ◽  
Flow Measurement ◽  
Gas Flow ◽  
Test Results ◽  
Invariant System ◽  
Rate Measurement ◽  
Gas Flow Rate ◽  
Flow Rate Measurement ◽  
Wet Gas

The article deals with one of the important tasks of modern flow measurement, which is related to the measurement of the flow rate and the amount of wet gas. This task becomes especially important when it becomes necessary to obtain information about the separate amount of the dry part of the gas that is contained in the form of a mixture in the wet gas stream. The paper presents the principle of operation and structure of the invariant system for measuring the flow rate of wet gas, which is based on the combined use of differential pressure flowmeters and Coriolis flowmeters. The operation of the invariant wet gas flow rate measurement system is based on the simultaneous application of the multichannel principle and the partial flow measurement method. Coriolis flowmeters and the differential pressure flowmeter are used as the main elements of the system. The proposed measurement system does not offer applications for gases with abundant drip humidity. The article provides information about the test results of the proposed invariant system. The estimation of the metrological characteristics of the invariant system when measuring the flow rate of wet gas is given. The obtained test results of the invariant wet gas flow rate measurement system are relevant for natural gas production, transportation, and storage facilities.

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