Role of Targeted Breeding to Improve Wheat Production on the Marginal Lands of Africa

Roopnarain, A.; Kidson, M. V.; Mndzebele, B.; Hernandez-Soriano, M. C.; Ndaba, B.

doi:10.1007/978-3-031-55185-7_12

The Marginal Soils of Africa 2024

DOI: 10.1007/978-3-031-55185-7_12

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Role of Targeted Breeding to Improve Wheat Production on the Marginal Lands of Africa

A. Roopnarain,

M. V. Kidson,

B. Mndzebele

et al.

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2024

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Fodder oats as catch crop: potential to reduce nitrogen losses from soil

Kidson,

Hernandez-Soriano,

Mndzebele

et al. 2024

Preprint

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Reducing nitrogen (N) losses and associated nitrate (NO3-) leaching and nitrous oxide emissions from agricultural land is a critical target worldwide. This is particularly urgent in areas with low fertility soils and a climate that increases the risk of N loss, such as the arid and temperate regions of South Africa. Here, we assessed the potential of fodder oats (Avena sativa) as a winter catch crop to deplete residual N in a field laid fallow for the previous four years, where vetch had proliferated. The soil presented a high clay content (34-44%), with the main exchangeable bases being calcium and magnesium hence, ammonium (NH4+) deposited by the vetch was expected to be rapidly adsorbed and slowly released. A significant decrease in the concentrations of NO3-(49%) and NH4+(30%) throughout the soil profile (0-90 cm) was observed following harvest of the oats compared to the concentrations measured before sowing. The effectiveness of the oats to uptake both forms of N from top and deep soil layers enhances their potential to reduce N losses. Our results are useful to fill current knowledge gaps on N dynamics in understudied, vulnerable soils such as agricultural land in South Africa, and to advance crop rotation strategies that reduce risk of N leaching.

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Fodder oats as catch crop: potential to reduce nitrogen losses from soil

Kidson,

Hernandez-Soriano,

Mndzebele

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

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Role of Targeted Breeding to Improve Wheat Production on the Marginal Lands of Africa

Cited by 1 publication

References 76 publications

Fodder oats as catch crop: potential to reduce nitrogen losses from soil

Fodder oats as catch crop: potential to reduce nitrogen losses from soil

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