scholarly journals WATER MANAGEMENT AND METHANE EMISSION FROM RICE CULTIVATION: A CASE STUDY IN AN GIANG PROVINCE, VIET NAM

2018 ◽  
Vol 54 (2A) ◽  
pp. 91
Author(s):  
Duong Mai Linh
Keyword(s):  
Water Management ◽  
Global Warming ◽  
Rice Yield ◽  
Soil Surface ◽  
Water Levels ◽  
Rice Cultivation ◽  
Viet Nam ◽  
Ch4 Emission ◽  
Wetting And Drying

Rice cultivation causes the emission of CH4 consequenced to the global warming. Reduction of irrigation in rice cultivation is not only saving water resources but also reducing greenhouse gases emission. The objectives of this study was to determine impacts of water management on the emission of CH4 and rice yield. Experiment was conducted in field conditions in An Giang province, Viet Nam with three treatments as continuous flooding (CF), An Giang Alternative Wetting and Drying (AAWD) which is mostly applied by farmers in An Giang province-Viet Nam, and Alternate Wetting and Drying (AWD). Water levels in the field +5 cm, ± 5 cm and -15 cm were controlled higher, fluctuated and lower than soil surface, respectively for CF, AAWD and AWD. CH4 emission determined every week during 13 weeks of the experiment. Rice yield was determined in 1 m2 at the end of the experiment. The results showed that AWD and AAWD, respectively decreased 78.7 % (p < 0.05) and 6.8 % (p > 0.05) CH4 emission compared to the CF 11.9 mg CH4/m2/h. The rice yield of CF was 6.32 ton/ha lower than AAWD 7.8 ton/ha (p < 0.05) but not different with AWD 6.67 ton/ha. AAWD had higher rice yield but same emission than the CF. Farmers in An Giang province should consider application of AWD in rice cultivation in term of saving water and reduction of CH4 emission.

scholarly journals WATER MANAGEMENT AND METHANE EMISSION FROM RICE FIELDS IN AN GIANG PROVINCE, VIET NAM

2018 ◽  
Vol 56 (2C) ◽  
pp. 140-147 ◽  
Author(s):  
Tran Thi Thanh Thuy
Keyword(s):  
Water Management ◽  
Rice Yield ◽  
Chemical Properties ◽  
Soil Surface ◽  
Viet Nam ◽  
Ch4 Emission ◽  
Wetting And Drying ◽  
Ch4 Emissions ◽  
Physico Chemical ◽  
Better Than

This study was carried out to investigate the effects of irrigated water management to CH4 emission from the paddy fields. It was designed with (1) continuous flooding (CF) and (2) alternate for wetting and drying (AWD) which the water level was controlled + 5 cm and ± 5 cm than the soil surface, respectively at Cho Moi, Chau Thanh, Thoai Son and Tri Ton districts of An Giang province. The soil samples were collected to determine their physico-chemical properties. CH4 was collected weekly during the rice cultivation, and the rice yield was determined at the harvest. The results showed that pH 4.55 – 5.93, EC 105 – 175 µS.cm-1, organic matter 3.21 – 3.94 %, CEC 25.05 – 33.33 cmol.kg-1 of the soil were suitable for rice growth. The average rice yield was about 4.5 - 6.52 ton.ha-1. CH4 emissions of the AWD decreased 59.1 % compared to the CF which was 14.6 mg C-CH4.m-2.h-1. Therefore, the AWD is better than the CF in term of reducing CH4 emissions to the environment.

Super Rice Cropping Will Enhance Rice Yield and Reduce CH4 Emission: A Case Study in Nanjing, China

Rice Science ◽  
2013 ◽  
Vol 20 (6) ◽  
pp. 427-433 ◽  
Author(s):  
Yu JIANG ◽  
Li-li WANG ◽  
Xiao-jun YAN ◽  
Yun-lu TIAN ◽  
Ai-xing DENG ◽  
...  
Keyword(s):  
Rice Yield ◽  
Ch4 Emission

scholarly journals Mitigation Potential and Yield-Scaled Global Warming Potential of Early-Season Drainage from a Rice Paddy in Tamil Nadu, India

Agronomy ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 202 ◽  
Author(s):  
Aung Zaw Oo ◽  
Shigeto Sudo ◽  
Kazuyuki Inubushi ◽  
Umamageswari Chellappan ◽  
Akinori Yamamoto ◽  
...  
Keyword(s):  
Global Warming ◽  
Global Warming Potential ◽  
Tamil Nadu ◽  
Rice Yield ◽  
Ghg Emissions ◽  
Paddy Rice ◽  
Wet Season ◽  
Wetting And Drying ◽  
Early Season ◽  
Ch4 Emissions

Water-intensive systems of rice cultivation are facing major challenges to increase rice grain yield under conditions of water scarcity while also reducing greenhouse gas (GHG) emissions. The adoption of effective irrigation strategies in the paddy rice system is one of the most promising options for mitigating GHG emissions while maintaining high crop yields. To evaluate the effect of different alternate wetting and drying (AWD) irrigation strategies on GHG emissions from paddy rice in dry and wet seasons, a field experiment was conducted at the Tamil Nadu Rice Research Institute (TRRI), Aduthurai, Tamil Nadu, India. Four irrigation treatments were included: One-AWD (one early drying period), Two-AWD (two early drying periods), Full-AWD (wetting and drying cycles throughout the rice season), and CF (continuous flooding). Different rice varieties were also tested in the experiment. In this study, we emphasized one factor (irrigation effect) that affects the dependent variable. The results show that early AWD treatments reduced methane (CH4) emissions by 35.7 to 51.5% in dry season and 18.5 to 20.1% in wet season, while full-AWD practice reduced CH4 emissions by 52.8 to 61.4% compared with CF. Full-AWD in dry season not only significantly reduced CH4 emission during that season, it also resulted in the decline of the early season emission in the succeeding wet season. Global warming potential (GWP) and yield-scaled GWP were reduced by early or full season AWD in both rice seasons. The GWP value from nitrous oxide (N2O) was relatively low compared to that from CH4 in both rice seasons. Rice yield was not affected by irrigation treatments although varietal differences in grain and straw yields were observed in both rice seasons. This study demonstrated that early season water managements are also effective in reducing CH4 and total GHG emissions without affecting rice yield.

scholarly journals Impact of Water Management on the Arsenic Content of Rice Grain and Cultivated Soil in an Arsenic Contaminated Area of Bangladesh

2015 ◽  
Vol 7 (2) ◽  
pp. 43-46 ◽  
Author(s):  
MS Rahman ◽  
MN Islam ◽  
MZ Hassan ◽  
SA Islam ◽  
SK Zaman
Keyword(s):  
Water Management ◽  
Natural Resources ◽  
Ground Water ◽  
Rice Yield ◽  
Arsenic Content ◽  
Rice Grain ◽  
Wetting And Drying ◽  
Standing Water ◽  
Rice Roots ◽  
Contaminated Area

A study was conducted in an arsenic (As) contaminated area of Faridpur, Bangladesh with a view to observe the effect of reduced irrigation on the As concentration of rice grain. Rice yield of BRRI dhan28 was found to be slightly higher in alternate wetting and drying (AWD) method than in continuous standing water (CSW) method of irrigation although not significant. The highest grain As conc. (0.65 mg/kg) was observed in the plots irrigated with ground water by CSW method. Significant reduction in grain As conc. was observed in AWD plots irrigated with contaminated ground water. Partial aeration of soil in AWD may have hindered the entrance of water As to rice roots. No significant reduction of soil As conc. was observed due to the application of AWD method. Reduction in grain As in AWD method implies that this technique can be devised as tool for mitigation of As in the As contaminated areas for irrigation of rice.DOI: http://dx.doi.org/10.3329/jesnr.v7i2.22202 J. Environ. Sci. & Natural Resources, 7(2): 43-46 2014

scholarly journals Legal and water management policy during climate warming in Poland

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Michał Marszelewski ◽  
Adam Piasecki
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Global Warming ◽  
Climate Warming ◽  
Underground Water ◽  
Water Levels ◽  
Management Policy ◽  
Legal Provisions ◽  
Agricultural Areas

Abstract The article discusses some of the effects of global warming on rivers, lakes and underground water in Poland. It documents serious difficulties in river shipping and energy, as well as the exposing of areas previously occupied by lakes as a result water levels lowering. It is pointed out that the rapid increase in intensive irrigation of agricultural areas is causing excessive exploitation of underground water. The analysis takes into account the relevant data. The presentation of the effects of global warming is expanded upon with the legal provisions applicable in these situations. In the absence of climate change law, these are general regulations that face a number of difficulties in application. The detailing of areas of law and hydrology leads to the conclusion that Poland lacks a coherent policy on climate warming.

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