Nitrogen Use in Maize (Zea mays)–Pigeonpea (Cajanus cajans) Intercrop in Semi-arid Conditions of Kenya

Show simple item record Mburu, Mary W. K. Wanderi, S. W. Silim, S. N. Kihanda, F. M. 2014-12-10T12:04:26Z 2014-12-10T12:04:26Z 2011
dc.identifier.citation Innovations as Key to the Green Revolution in Africa 2011, pp 563-570 en_US
dc.identifier.isbn 978-90-481-2541-8
dc.identifier.isbn 978-90-481-2543-2
dc.description DOI 10.1007/978-90-481-2543-2_58 en_US
dc.description.abstract A field experiment was conducted at Jomo Kenyatta University of Agriculture and Technology between 2001 and 2002 to determine nitrogen use in maize–pigeonpea intercrop system. The experiment was laid out as a randomized complete block design replicated four times. Treatments included two pigeonpea maturity types: two long-duration types (erect and semi-erect) and one medium-duration type intercropped with maize (Katumani Composite) or sole crop. Data on plant total N uptake, litter fall, N fixed and soil mineral N at key phenological stages were determined. Results showed that intercropping maize and pigeonpea increased maize grain N concentration compared to sole maize, an indication of nutritional quality improvement. Long-duration cultivars had the highest plant N uptake and contributed high amount of N through litter fall and biological fixation compared to medium duration. Soil mineral N increased over time, probably due to soil N mineralization or pigeonpea N contribution through litter fall decomposition which ranged from 3.9 to 7.6 t/ha. Maize yield and N uptake in subsequent season after pigeonpea were higher in plots previously planted with pigeonpea than those planted continuously with maize. In conclusion, this study showed that long-duration pigeonpeas may play an important role in low-input maize production systems primarily through N cycling (probably through capture of deep soil N pool and litter) and through biological nitrogen fixation and this improves maize yield and quality. en_US
dc.language.iso en en_US
dc.publisher Springer Netherlands en_US
dc.subject Nitrogen uptake en_US
dc.subject N fixation en_US
dc.subject Maize–pigeonpea intercrop en_US
dc.subject Residual effect en_US
dc.subject Soil mineral N en_US
dc.title Nitrogen Use in Maize (Zea mays)–Pigeonpea (Cajanus cajans) Intercrop in Semi-arid Conditions of Kenya en_US

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