Effect of Water-Saving Irrigation on CH&lt;sub&gt;4&lt;/sub&gt; Emissions from Rice Fields

Li, Dao Xi

doi:10.4028/www.scientific.net/amr.396-398.1950

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…Leaf area index is the sum of total green leaf areas per unit land area. The method of determining chlorophyll content was as described by Li et al (2012), the total chlorophyll content was determined by the sum of chlorophyll a, chlorophyll b, and carotene content.…”

Section: 31mentioning

confidence: 99%

Nitrogen forms and irrigation regimes interact to affect rice yield by regulating the source and sink characteristics

et al. 2021

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The interaction betweennitrogen management and irrigation regimes plays important roles in regulating the rice (Oryza sativa L.) source, sink characteristic, and grain yield. However, if and how nitrogen forms could synergistically interact with irrigation methods in rice remain unclear. Herein, a soil-grown experiment was conducted with three nitrogen forms, namely, ammonium nitrogen (AN), ammonium, nitrate mixed (ANM), and nitrate nitrogen (NN), as well as three irrigation regimes, namely, submerged irrigation (0 kPa), alternate wetting and moderate drying (−20 kPa), and alternate wetting and severe drying (−40 kPa). Results demonstrated that grain yield was the highest in the ammonium nitrate and alternate wetting and moderate drying irrigation. Nitrate nitrogen application decreased grain yield in each irrigation regime. The alternate wetting and moderate drying and ammonium nitrate treatment had higher chlorophyll content, leaf nitrogen content, leaf area index (LAI), photosynthesis rate, and chlorophyll fluorescence, superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and sucrose-synthase activity and decreased leaf malondialdehyd (MDA) content than the other treatments at mid-tillering, panicle initiation, heading, and maturity stages. By contrast, AN treatment exhibited very small difference between AN and ANM treatment in submerged irrigation. Besides, grain yield was positively correlated with chlorophyll content, leaf nitrogen content, LAI, photosynthesis rate, antioxidant enzymes, and sucrose-synthase activity at main growth stages. Therefore, the adoption of ANM and alternate wetting and moderate drying can synergistically increase grain yield by promoting the leaf-source and grain-sink activity of rice. Results of the present investigation provided new ideas for increasing grain yield by nitrogen forms management in alternate wetting and drying irrigation.

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Section: 31mentioning

confidence: 99%

Nitrogen forms and irrigation regimes interact to affect rice yield by regulating the source and sink characteristics

et al. 2021

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“…In addition, it can be said that the use of efficient fertilizers positively affects the reduction of greenhouse gas emissions, since paddy production with drip irrigation is completely flooded production (Ramesh et al, 2019). Li (2012) compared the emission of methane gas (CH4) with conventional production in a watersaving method. In water-saving applications, methane emission was found 39-85% less than applications with flood irrigation.…”

Section: Introductionmentioning

confidence: 99%

Production Cost and Water Savings of Paddy Produced by Drip Irrigation

Taş¹

2021

CTNS

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Although there are different opinions on climate variability and global warming, it is a common idea in all hypotheses that water will become even more scarce. The water used in the production of paddy, which is one of the most important food sources for the majority of the population in the world, is too much due to the irrigation method. The average global water footprint of paddy production is reported as 1.391 billion m3/year. Considering this amount, it can be seen that paddy has an enormous environmental footprint. Excessive water use causes both waste of scarce resource water and numerous environmental problems during production. The most important reason for flooded production is the ability of paddy to grow/develop in water and to have a less competitive capacity with weeds. However, when rice is grown with drip irrigation, which is one of the irrigation methods that save water with high efficiency, significant increases in both yield and quality occur. Studies are showing that 50-74.6% water saving is achieved in paddy production with drip irrigation depending on the region, climate, soil, variety, producer habits, and similar situations. In addition, the cost of one kilogram of paddy produced in the drip irrigation system in the conditions of Canakkale province of Turkey has been calculated as 0.35 $. This value has been calculated as 0.44 $ in the flooded method. In addition, methane, carbon dioxide, and Nitrous oxide emissions are significantly reduced due to the transition from anaerobic to aerobic conditions. In this way, greenhouse gas emissions, other environmental negative effects, and especially groundwater pollution caused by paddy production can be reduced.

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Effect of Water-Saving Irrigation on CH<sub>4</sub> Emissions from Rice Fields

Cited by 2 publications

References 26 publications

Nitrogen forms and irrigation regimes interact to affect rice yield by regulating the source and sink characteristics

Nitrogen forms and irrigation regimes interact to affect rice yield by regulating the source and sink characteristics

Production Cost and Water Savings of Paddy Produced by Drip Irrigation

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