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Spatial trends in the nitrogen budget of the African agro-food system over the past five decades
Faculty
Agriculture
Year:
2019
Type of Publication:
ZU Hosted
Pages:
Authors:
Mohamed Kamal Abdelfatah Mohamed
Staff Zu Site
Abstract In Staff Site
Journal:
Environmental Research Letters IOP Publishing
Volume:
Keywords :
Spatial trends , , nitrogen budget , , African agro-food
Abstract:
Low nitrogen (N) fertilization is a dominant cause of malnutrition in Africa, but the spatial and temporal variability of N cycling patterns in Africa remain unclear. This study is the first to perform a detailed analysis of the N cycling patterns of 52 African countries from 1961 to 2016. We calculated the N use efficiency (NUE) in crop production, country-specific N fertilization trends, and the impacts of N fertilization on human protein demand and the environment. Over the past five decades, total N input to African croplands increased from 20 to 35 kg N ha−1 yr−1, while the application of synthetic N fertilizers (SNF) increased from 4.0 to 15 kg N ha−1 yr−1. N contributions from animal manure and biological N fixation remained lower than 10 kg N ha−1 yr−1 and 20 kg N ha−1 yr−1, respectively. The total N crop production increased from 15 to 22 kg N ha−1 yr−1 from 1961 to 2016. Total N surplus in Africa increased from 5 to 13 kg N ha−1 yr−1, while estimated gaseous losses increased from 4.0 to 11 kg N ha−1 yr−1. However, NUE declined from 74% to 63% during the past five decades, and protein consumption increased from 2.99 to 3.78 kg N capita−1 yr−1.
Author Related Publications
Mohamed Kamal Abdelfatah Mohamed, "تأثير مصدر الكالسيوم على تعديل خواص الأراضي الملحية الصودية", Egypt. J. Soil Sci., 2014
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Mohamed Kamal Abdelfatah Mohamed, "تقييم نوعية المياه العادمة لمصارف بحر البقر، القليوبية وبلبيس في شرق الدلتا - مصر لإستخدامها في أغراض الري", Cairo, A.R.E. : National Information and Documentation Centre, 2016
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Mohamed Kamal Abdelfatah Mohamed, "تأثير المصادر المختلفة للأسمدة النيتروجينية المخلوطة مع الفيرميكوليت على إنتاجية القمح وتيسر النيتروجين في أرض رملية في مصر", Academic Journals Inc., 2013
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Mohamed Kamal Abdelfatah Mohamed, "Improving productivity and nutrient uptake of wheat plants using Moringa Oleifera leaf extract in sandy soil", Taylor & Francis Group, 2017
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Mohamed Kamal Abdelfatah Mohamed, "تأثير أحجام حبيبات الجبس على استصلاح الأراضي الملحية الصودية في مصر", Taylor & Francis Group, LLC, 2014
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Department Related Publications
Ayman Mahmoud Helmy Mohamed Abozied, "RESPONSE OF SEED IRRADIATION WITH GAMMA RAY, N-FERTILIZATION AND BIO FERTILIZATION OF BARLEY (Hordeum vulgare L.) GROWN ON A SAND SOIL", J. Soil Sci. and Agric. Eng., Mansoura Univ, 2014
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Mohammed Ahmed Said Mettwally, "Evaluation fertility of some soils using chemical and thermodynamic method", مجلة الزقازيق للبحوث الزراعية, 2016
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Mohamed Kamal Abdelfatah Mohamed, "اتجاه لاستصلاح وتحسين خصوبة الأراضي المتأثرة بالأملاح", Cairo, A.R.E. : National Information and Documentation Centre, 2013
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Sarah Alsayed Elsayed Elsayed Foda, "The effects of the conjunctive use of compost tea and inorganic fertilization on radish (Raphanus sativus L) plant nutrient uptake and soil microorganisms", المجلة المصرية لعلوم الاراضى, 2016
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Mohammed Saied Dosoki Abohashim, "Impact of land-use and land-management on the water infiltration capacity of soils on a catchment scale", , GermanyISBN: 978-3-930037-74-2 , Julius Kühn Institute (JKI, 2011
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