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The impact of legumes relay-intercropped into maize at Domboshava, Zimbabwe

By: Jeranyama, P.
Contributor(s): Hesterman, O.B [coaut.] | Waddington, S.R [coaut.] | Waddington, S.R.|Murwira, H.K.|Kumwenda, J.D.T.|Hikwa, D.|Tagwira, F [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Harare (Zimbabwe) Soil Fert Net|CIMMYT : 1998ISBN: 970-648-006-4.Subject(s): Fertilizers | Intercropping | Legumes AGROVOC | Nitrogen content | Vigna unguiculata | Zimbabwe | CIMMYT | Soil Fert Net | Zea mays AGROVOC | Farming systems AGROVOCDDC classification: 631.45 Summary: The impact of relay-intercropping a food legume (cowpea, Vigna unguiculata L.) and a tropical forage legume (sunnhemp, Crotalaria juncea L.) into maize was evaluated at Domboshava in Zimbabwe. For both legumes the accumulation of dry matter was greatest at 75 days after relay-intercropping. Herbage biomass (averaged over two years) was 2.3 Mg ha-1 for cowpea and 3.1 Mg ha-1 for sunnhemp. Highest total nitrogen (N) accumulation in the legume biomass was 111 kg N ha-1 for sunnhemp and 59 kg N ha-1 for cowpea. Relay-intercropped maize fertilized with 60 kg N ha-1 had grain yields equal to or better than those of a sole maize crop at the same fertilizer rate. However at the other N rates, maize yields were reduced indicating competition between the maize and the legume. In the subsequent year, maize following maize relay-intercropped with the legume produced 20% more grain yield than the sole maize control. The grain N content of a subsequent maize crop was improved by 82% relative to the sole maize control. The legume replaced up to 36 kg N ha-1 of the N requirements in the subsequent maize crop.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 631.45 WAD (Browse shelf) 1 Available A628739
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The impact of relay-intercropping a food legume (cowpea, Vigna unguiculata L.) and a tropical forage legume (sunnhemp, Crotalaria juncea L.) into maize was evaluated at Domboshava in Zimbabwe. For both legumes the accumulation of dry matter was greatest at 75 days after relay-intercropping. Herbage biomass (averaged over two years) was 2.3 Mg ha-1 for cowpea and 3.1 Mg ha-1 for sunnhemp. Highest total nitrogen (N) accumulation in the legume biomass was 111 kg N ha-1 for sunnhemp and 59 kg N ha-1 for cowpea. Relay-intercropped maize fertilized with 60 kg N ha-1 had grain yields equal to or better than those of a sole maize crop at the same fertilizer rate. However at the other N rates, maize yields were reduced indicating competition between the maize and the legume. In the subsequent year, maize following maize relay-intercropped with the legume produced 20% more grain yield than the sole maize control. The grain N content of a subsequent maize crop was improved by 82% relative to the sole maize control. The legume replaced up to 36 kg N ha-1 of the N requirements in the subsequent maize crop.

English

9906|AGRIS 9902|R98-99PROCE

Jose Juan Caballero

CIMMYT Publications Collection

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