Subsoiling during summer fallow in rainfed winter-wheat fields enhances soil organic carbon sequestration on the Loess Plateau in China

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Date: Jan. 27, 2021
From: PLoS ONE(Vol. 16, Issue 1)
Publisher: Public Library of Science
Document Type: Report
Length: 7,873 words
Lexile Measure: 1510L

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Abstract :

Scientific management of the soil organic carbon (SOC) pool, e.g., through a reasonable tillage system, is a potential way to mitigate global climate change. There is scarce information about the effect of tillage during the summer fallow period on the SOC pool in rainfed winter-wheat fields. The present study was designed to evaluate the effects of tillage practices, i.e., plow tillage (PTF), subsoiling (STF) and no tillage (NTF), during the summer fallow period on SOC sequestration in winter-wheat fields in the rainfed area of the eastern Loess Plateau of China. The SOC, mineral-associated organic carbon (MOC), permanganate-oxidizable organic carbon (POxC) and particulate organic carbon (POC) concentrations were determined after four years of tillage implementation during the summer fallow period. Our results showed that in comparison to the adoption of NTF, the adoption of STF significantly increased POxC, POC and MOC concentrations by 56.6-111.2%, 45.7-118.7% and 26.2-29.4%, respectively, at the 10-20 and 30-40 cm soil depths before sowing (P

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Gale Document Number: GALE|A649826446