Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production

Hou, Pengfu; Xue, Lian; Wang, Jing; Petropoulos, Evangelos; Xue, Lihong; Yang, Linzhang

doi:10.3390/agronomy12071548

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…The results highlight that it is soil substrates such as carbon sources, rather than microorganisms, that are the key factors affecting methane emissions under warming. In a green manure amendment experiment, Hou et al also highlighted the decisive role of soil LOC in paddy methane emissions [ 43 ]. In another study, Deng et al pointed out that the components of LOC (e.g., MBC, DOC) showed different responses to warming [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Hou

Deng

Wang

et al. 2023

IJERPH

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Introduction: This study aimed to assess the influence of experimental warming and fertilization on rice yield and paddy methane emissions. Methods: A free-air temperature increase system was used for the experimental warming treatment (ET), while the control treatment used ambient temperature (AC). Each treatment contained two fertilization strategies, (i) normal fertilization with N, P and K fertilizers (CN) and (ii) without N fertilizer input (CK). Results: The yield was remarkably dictated by fertilization (p < 0.01), but not warming. Its value with CN treatment increased by 76.24% compared to CK. Also, the interactive effect of warming and fertilization on CH4 emissions was insignificant. The seasonal emissions from warming increased by 36.93% compared to AC, while the values under CN treatment increased by 79.92% compared to CK. Accordingly, the ET-CN treatment obtained the highest CH4 emissions (178.08 kg ha−1), notably higher than the other treatments. Also, the results showed that soil fertility is the main driver affecting CH4 emissions rather than soil microorganisms. Conclusions: Fertilization aggravates the increasing effect of warming on paddy methane emissions. It is a daunting task to optimize fertilization to ensure yield and reduce methane emissions amid global warming.

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Section: Discussionmentioning

confidence: 99%

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Hou

Deng

Wang

et al. 2023

IJERPH

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“…Dhaincha green manuring was at par with 40 kg N ha -1 as urea in increasing the yield of direct-seeded and transplanted crops [7]. Green manure amendment is a profitable manipulation for enhancing carbon sequestration without increasing paddy CH 4 emissions [8]. Compared with the fallow-rice practice, the GM-rice practice increased the soil C stock at a rate of 1.62 Mg CO 2 -eq ha -1 yr -1 and reduced chemical N application by 40% with no loss in the rice yield [9].…”

Section: Introductionmentioning

confidence: 99%

Low Cost Zero till In situ Green Manuring for Kharif Rice-A Success Story

Ghorai¹,

Ghorai

2023

IJECC

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Low cost zero till in situ green manuring using plant species like dhaincha (Sesbania aculeata) and sunnhemp (Crotalaria juncea) will eliminate the age old problems of large scale adoption of green manuring across the farming community. These two species germinated and grown well when sown before (as paira crop during last irrigation) or after rice harvest under zero till condition, with assured nor western rain/monsoon rain or with one post sowing irrigation (7.5 cm). The zero till paira dhaincha green manuring process opened up the scope of producing green manuring at lower cost and saves up to Rs.15000/ha over conventional rain fed green manuring system. Green manuring by dhaincha produced 50-60 tonnes of biomass at 35-40 DAS in alluvial (North 24 PGS), lateritic (Purulia) and clay soils (Paschim Medinipur), produced 30-50 q raw rice /ha and saved 20-27 kg (30 per cent) chemical nitrogen/ha. This green manure will help in quicker decomposition of rice straw left after combined harvest (3.5- 6,0 t/ha), minimise its field burning, sequester enough carbon to the soil. Fifty tonnes green biomass of dhaincha/sunnhemp, has the potential to absorb 15 tonnes CO2 from the atmosphere, sequesters 2 tonnes of carbon in soil, minimise environmental pollution, improve soil health, its structure and water holding capacity. This technique can be adopted in rice growing countries across the globe without difficulty. Seed production dhaincha and sunnhemp is possible by growing it as paira crop (40 kg/ha) within kharif rice which grows up to 45 cm height, produces healthy pods and matures by 70 days which otherwise takes 5-8 months in normal season. If the seed crop is not harvested in rice fallows, from shattered seeds, self-seeded zero till and rain fed dhaincha manure can be obtained in rice fallows.

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The effect of winter crop incorporation on greenhouse gas emissions from double rice-green manure rotation in South China

Tang,

Liu,

et al. 2023

Environ Sci Pollut Res

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Green Manure Amendment in Paddies Improves Soil Carbon Sequestration but Cannot Substitute the Critical Role of N Fertilizer in Rice Production

Cited by 8 publications

References 36 publications

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Fertilization and Global Warming Impact on Paddy CH4 Emissions

Low Cost Zero till In situ Green Manuring for Kharif Rice-A Success Story

The effect of winter crop incorporation on greenhouse gas emissions from double rice-green manure rotation in South China

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