Soil Aggregation and Associated Organic Carbon Fractions as Affected by Tillage in a Rice–Wheat Rotation in North India | Zendy

Kumari Mamta | Zendy; Chakraborty Debashis | Zendy; Gathala Mahesh K. | Zendy; Pathak H. | Zendy; Dwivedi B.S. | Zendy; Tomar Rakesh K. | Zendy; Garg R.N. | Zendy; Singh Ravender | Zendy; Ladha Jagdish K. | Zendy

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Soil Aggregation and Associated Organic Carbon Fractions as Affected by Tillage in a Rice–Wheat Rotation in North India

Author(s) -

Kumari Mamta,

Chakraborty Debashis,

Gathala Mahesh K.,

Pathak H.,

Dwivedi B.S.,

Tomar Rakesh K.,

Garg R.N.,

Singh Ravender,

Ladha Jagdish K.

Publication year - 2011

Publication title -

soil science society of america journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.836

H-Index - 168

eISSN - 1435-0661

pISSN - 0361-5995

DOI - 10.2136/sssaj2010.0185

Subject(s) - loam , tillage , agronomy , soil carbon , particulate organic carbon , crop rotation , total organic carbon , oryza sativa , soil structure , chemistry , environmental science , soil water , crop , soil science , environmental chemistry , biology , nutrient , organic chemistry , biochemistry , phytoplankton , gene

Soil samples were obtained from a long‐term trial conducted on a silty loam at Sardar Vallabhbhai Patel University of Agriculture & Technology, Modipuram (Meerut), in 2007–2008 to study the effects of various combinations of conventional and zero‐tillage (ZT) and raised‐bed systems on soil aggregation and associated organic C fractions in the 0‐ to 5‐cm and 5‐ to 10‐cm depth in a rice–wheat ( Orysa sativa L.– Triticum aestivum L.) rotation. Macroaggregates increased under a ZT rice (direct‐seeded or transplanted) and wheat rotation with the 2‐ to 4‐mm fraction greater than that of the 0.25‐ to 2‐mm fraction. Bulk and aggregate associated C increased in ZT systems with greater accumulation in macroaggregates. The fine (0.053–0.25 mm) intra‐aggregate particulate organic C (iPOM‐C), in 0.25‐ to 2‐mm aggregates, was also higher in ZT than conventional tillage. A higher amount of macroaggregates along with greater accumulation of particulate organic C indicates the potential of ZT for improving soil C over the long‐term in rice‐wheat rotation.

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