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Nitrogen management and biological nitrogen fixation in sorghum / pigeonpea intercropping on Alfisols of the semi-arid tropics

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Title Nitrogen management and biological nitrogen fixation in sorghum / pigeonpea intercropping on Alfisols of the semi-arid tropics
 
Creator Adu-Gyamfi, J J
Ito, O
Yoneyama, T
Katayama, K
 
Subject Pigeonpea
Sorghum
 
Description Pigeonpea (Cajanus cajan L. Millsp) and sorghum (Sorghum bicolor L. Moench), are grown as intercrops on soils typified by low nitrogen (N), particularly Alfisols and Vertisols of the semi-arid tropical areas of India and East Africa. Proper management of fertilizer N in sorghum / pigeonpea intercropping systems is essential to enhancing biological nitrogen fixing ability of pigeonpea, and to increasing grain yields of sorghum. In a 3-year study, we examined the effect of time and rates of fertilizer N application on biological N fixation (BNF) and fertilizer N recovery by pigeonpea and sorghum grown as a sole crop, and as an intercrop on an Alfisol in India. In 1993, N (50 kg N ha ^ ) was all applied at planting ( basal) or at 40 days after sowing (delayed). During 1994-1995, four N rates 0, 25, 50, and 100 kg ha ^ were applied (i) 100% at planting (basal) or (ii ) 67% at 40 days, and 33% at 60 days after sowing (delayed). Delaying N fertilization until 40 days after sowing (DAS), rather than applying at sowing significantly increased (p
 
Publisher Japanese Society of Soil Science and Plant Nutrition
 
Date 1997
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/4767/1/Soil_Sc_Plant_Nutrition_43_1061-1066_1997.pdf
Adu-Gyamfi, J J and Ito, O and Yoneyama, T and Katayama, K (1997) Nitrogen management and biological nitrogen fixation in sorghum / pigeonpea intercropping on Alfisols of the semi-arid tropics. Soil Science and Plant Nutrition, 43. pp. 1061-1066.