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The International Journal of Life Cycle Assessment

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01.09.2014 | CARBON FOOTPRINTING

Assessment of carbon sustainability under different tillage systems in a double rice cropping system in Southern China

verfasst von: Jian-Fu Xue, Sheng-Li Liu, Zhong-Du Chen, Fu Chen, Rattan Lal, Hai-Ming Tang, Hai-Lin Zhang

Erschienen in: The International Journal of Life Cycle Assessment | Ausgabe 9/2014

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Abstract

Purpose

Adoption of the carbon (C)-friendly and cleaner technology is an effective solution to offset some of the anthropogenic emissions. Conservation tillage is widely considered as an important sustainable technology and for the development of conservation agriculture (CA). Thus, the objective of this study was to assess the C sustainability of different tillage systems in a double rice (Oryza sativa L.) cropping system in southern China.

Methods

The experiment was established with no-till (NT), rotary tillage (RT), and conventional tillage (CT) treatments since 2005. Emission of greenhouse gasses (GHG), C footprint (CF), and ecosystem service through C sequestration in different tillage systems were compared.

Result and discussion

Emission of GHG from agricultural inputs (Mg CO₂-eq ha⁻¹ year⁻¹) ranged from 1.81 to 1.97 for the early rice, 1.82 to 1.98 for the late rice, and 3.63 to 3.95 for the whole growing season, respectively. The CF (kg CO₂-eq kg⁻¹ of rice year⁻¹) in the whole growing seasons were 1.27, 1.85, and 1.40 [excluding soil organic carbon (SOC) storage] and 0.54, 1.20, and 0.72 (including SOC storage) for NT, RT, and CT, respectively. The value of ecosystem services on C sequestration for the whole growing seasons ranged from ¥3,353 to 4,948 ha⁻¹ year⁻¹ and followed the order of NT > CT > RT. The C sustainability under NT was better than that under RT for the late, but reversed for the early rice. However, NT system had better C sustainability for the whole cropping system compared with CT.

Conclusions

Therefore, NT is a preferred technology to reduce GHG emissions, increase ecosystem service functions of C sequestration, and improve C sustainability in a double rice cropping region of Southern China.

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Titel: Assessment of carbon sustainability under different tillage systems in a double rice cropping system in Southern China
verfasst von: Jian-Fu Xue
Sheng-Li Liu
Zhong-Du Chen
Fu Chen
Rattan Lal
Hai-Ming Tang
Hai-Lin Zhang
Publikationsdatum: 01.09.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: The International Journal of Life Cycle Assessment / Ausgabe 9/2014
Print ISSN: 0948-3349
Elektronische ISSN: 1614-7502
DOI: https://doi.org/10.1007/s11367-014-0768-4

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Abstract

Purpose

Methods

Result and discussion

Conclusions

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