Contribution of Nitrogen to Growth of Maize in Legume-maize Rotation on Limed Ultisols
Liming of soils and the use of legume residues in a crop rotation are considered good approaches to reduce the constraints of high aluminium and low native nitrogen affecting annual food crop production in Ultisols. Using this approach the values of nitrogen contributed to maize in three groundnut...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Universiti Putra Malaysia Press
1994
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| Online Access: | http://psasir.upm.edu.my/id/eprint/3203/ http://psasir.upm.edu.my/id/eprint/3203/1/Contribution_of_Nitrogen_to_Growth_of_Maize_in_Legume-maize_Rotation.pdf |
| Summary: | Liming of soils and the use of legume residues in a crop rotation are considered good approaches to reduce the
constraints of high aluminium and low native nitrogen affecting annual food crop production in Ultisols. Using
this approach the values of nitrogen contributed to maize in three groundnut (L)-maize (M) sequences (LMLM,
MLLM and LLLM) in an intensive rotational cropping system were estimated. The estimates were made by
subtracting the total N-uptake by maize in the zero N-fertilized monocropping from the total N-uptake by maize
under the respective legume-maize rotation. The results showed that it is possible to sustain an increased yield of
groundnut and maize on limed Ultisols. In the groundnut-maize cropping system, the average N contribution
was after one, two and three successive groundnut crops was 19, 33, and 56 kg N ha-1. The latter estimate is
about one-third of the newly recommended total N requirement of maize, 159 kg N ha-1. |
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