Cereal Nitrogen Use Efficiency in Sub Saharan Africa

被引：26

作者：

Edmonds, Daniel E. ^{[1
]}

Abreu, Silvano L. ^{[1
]}

West, Adelheid ^{[1
]}

Caasi, Donna R. ^{[1
]}

Conley, Travis O. ^{[1
]}

Daft, Michael C. ^{[1
]}

Desta, Birehane ^{[1
]}

England, Brandon B. ^{[1
]}

Farris, Chelsea D. ^{[1
]}

Nobles, Tia J. ^{[1
]}

Patel, Nehaben K. ^{[1
]}

Rounds, Elliott W. ^{[1
]}

Sanders, Brennan H. ^{[1
]}

Shawaqfeh, Samar S. ^{[1
]}

Lakmini ^{[1
]}

Lokuralalage ^{[1
]}

Manandhar, Roji ^{[1
]}

Raun, W. R. ^{[1
]}

机构：

[1] Oklahoma State Univ, Dept Plant & Soil Sci, Stillwater, OK 74078 USA

来源：

JOURNAL OF PLANT NUTRITION | 2009年 / 32卷 / 12期

关键词：

nitrogen; rice; wheat; corn; nutrient uptake; fertilizers; soil fertility; SOIL-MANAGEMENT; FOOD SECURITY; FERTILITY; IMPACTS; SORGHUM; MAIZE; YIELD;

D O I：

10.1080/01904160903308184

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Cereal production in Sub Saharan Africa (SSA) is inadequate for supporting population nutritional demands. Nutrient mining of nitrogen (N) has taken place in all areas where cereals are produced in SSA. This review reports on the nitrogen use efficiency (NUE) of Sub Saharan Africa cereal grain production. For SSA, NUE's exceed 100%. In light of the low N application rates, high NUE's speak to a much bigger and potentially damaging situation for cereal production in SSA. Limited supplies of N, the continual rise in prices and elevated economic risk of N fertilization, combined with existing low yield levels of cereal production reiterates the importance of NUE in SSA and the importance of aiding this region in overcoming its dysfunctional agriculture production systems. High NUE's for SSA are a direct result of applying so little fertilizer N, at the ultimate expense of mining an already depleted soil resource.

引用

页码：2107 / 2122

页数：16

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