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UKAID Department for International Development (R4D) 1991

Fixation and cycling of nitrogen in dryland legume/cereal production (HOLDBACK FUNDS)

Nitrogen Legume/Cereal

UKAID Department for International Development (R4D)

Titre : Fixation and cycling of nitrogen in dryland legume/cereal production (HOLDBACK FUNDS)

Pays : Syrie

Projet de recherche pour le Développement : R4779

DFID Programme : CGIAR Competitive Research Facility and Holdback Funds

Organismes de mise en œuvre
Lead Institutes : Department of Soil Science, University of Reading
Managing Institutes : Rural Livelihoods Department, Department for International Development (UK) (RLD)

Durée : Start Date : 01-10-1991 End Date : 30-09-1995

Objectif
The overall objective is to assess the long-term sustainability of rainfed legume/cereal production systems in dry environments.
The specific objectives of this project are to use the existing ICARDA legume/cereal trial in order to : * measure the amounts of biologically fixed nitrogen by the various legumes using 15N techniques * measure the amounts of nitrogen being cycled in each of the treatments * measure the losses of nitrogen from each of the treatments * quantify the effects of management practices (such as animal grazing) on the amounts of nitrogen cycling and the nitrogen losses * determine the fate of applied nitrogen fertiliser using 15N techniques and assess the long-term sustainability of the various production systems * measure the changes in total carbon and nitrogen in the various treatments * determine the amounts of carbon and nitrogen in the soil biomass model the nitrogen and carbon cycles in the soil/plant/animal system and assess the long-term sustainability of the production systems in the trial.
The existing trial at ICARDA is well-suited for this study. The super-imposition of this work will not affect the existing experiments but will greatly enhance the amount and quality of the data that can be obtained from the trials. In addition, the long-term nature of the trial will provide valuable and scarce data on changes in levels of nitrogen and organic matter in this type of environment.

Total Cost to DFID : £259,457

Présentation : UKAID

Page publiée le 13 novembre 2015, mise à jour le 17 octobre 2017