NDLI: Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

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Agronomy for Sustainable Development : Volume 37

Agronomy for Sustainable Development : Volume 36

Agronomy for Sustainable Development : Volume 36, Issue 4, December 2016

Erratum to: Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

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Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

Farming tactics to reduce the carbon footprint of crop cultivation in semiarid areas. A review

Agronomy for Sustainable Development : Volume 36, Issue 3, September 2016

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Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

Content Provider	Springer Nature Link
Author	Thilakarathna, Malinda S. McElroy, Michel S. Chapagain, Tejendra Papadopoulos, Yousef A. Raizada, Manish N.
Copyright Year	2016
Abstract	Nitrogen is the most limiting nutrient in most agro-ecosystems and thus critical for sustaining high yields. Conventional agricultural practices use synthetic fertilizers to ensure an adequate supply of nitrogen in soils, but fertilizers come at a significant monetary and environmental cost. A strategy to improve nitrogen supply in cropping systems is the inclusion of nitrogen-fixing legumes, which can provide nitrogen benefits to companion crops through belowground nitrogen transfer. However, a better understanding of the underlying mechanisms and factors that govern nitrogen transfer is important in order to determine potential areas for improving this association. Here, we review the mechanisms of belowground nitrogen transfer in managed herbaceous cropping systems, focusing on forage systems. We classify three major routes of nitrogen transfer from legumes to non-legumes: (1) decomposition of legume root tissues and uptake of mineralized nitrogen by neighboring plants, (2) exudation of soluble nitrogen compounds by legumes and uptake by non-legumes, and (3) transfer of nitrogen mediated by plant-associated mycorrhizae. Literature data shows that rates of nitrogen transfer range from 0 to 73 % from forage legumes to companion grasses in mixed stands, depending on the legume species and cultivar. We list the factors that affect nitrogen transfer including abiotic factors, e.g., water stress, temperature, light, soil available nitrogen, and application of nitrogen fertilizer, and biotic factors, e.g., root contact, plant density, growth stage, production year, defoliation, and root herbivores. While the rates of nitrogen transfer are often constrained by abiotic conditions, such as temperature and water availability, that are beyond the control of growers, agronomic practices, e.g., planting density and choice of species and cultivar, may help to increase nitrogen transfer. Ultimately, the selection of plant pairs with compatible traits offers the best path forward to improving nitrogen transfer in intercrops.
Starting Page	1
Ending Page	16
Page Count	16
File Format	PDF
ISSN	17740746
Journal	Agronomy for Sustainable Development
Volume Number	36
Issue Number	4
e-ISSN	17730155
Language	English
Publisher	Springer Paris
Publisher Date	2016-10-07
Publisher Institution	Institut National de la Recherche Agronomique (INRA)
Publisher Place	Paris
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nitrogen transfer Symbiotic nitrogen fixation Cropping system Legume Non-legume Root exudate Decomposition Mycorrhizae Mineralization Agriculture Soil Science & Conservation Sustainable Development
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Agronomy and Crop Science

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Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

Erratum to: Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

Erratum to: Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

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Belowground nitrogen transfer from legumes to non-legumes under managed herbaceous cropping systems. A review

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