Nitrogen and light partitioning in a maize/soybean intercropping system under a humid subtropical climate

Clément, Alain; Chalifour, François-P.; Gendron, G.; Bharati, Maheshwar P.

doi:10.4141/cjps92-008

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…Gardiner and Craker (1981) found that photosynthetically active radiation (PAR, 400–700 nm wavelength) incident on bean ( Phaseolus vulgaris L.) decreased as maize ( Zea mays L.) density increased, significantly depressing bean dry matter and seed yield compared to the unshaded monocrop. Clement et al. (1992) measured incident photosynthetic photon flux density (PPFD) in a maize–soybean ( Glycine max L.) intercrop at ‘various moments during the growth cycle.’ Percentage PPFD reaching the soybean was minimal (59 %) at 66 days after planting (DAP).…”

Section: Introductionmentioning

confidence: 99%

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Diurnal and Seasonal Light Transmission to Cowpea in Sorghum–Cowpea Intercrops in Mali

Gilbert¹,

Heilman²,

Juo³

2003

J Agronomy Crop Science

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Tall cereal-short legume intercropping is ubiquitous in the semiarid tropics of West Africa, yet little is known regarding the dynamics of light interception in these systems. A field study was conducted in Cinzana, Mali, to characterize light transmission to cowpea in sorghum [Sorghum bicolor (L.) Moench]-cowpea [Vigna unguiculata (L.) Walp] intercropping systems. Different sorghum-cowpea planting configurations were used to examine photosynthetically active radiation (PAR) incident on the cowpea. The 4-m tall sorghum cultivar CSM 219E intercepted > 60 % of incoming PAR from 2 m height to harvest (50 days). Consequently, total seasonal PAR received by intercropped cowpea was 60-66 % that of the unshaded monocrop. Thirty-minute averages of PAR transmitted around solar noon had poor agreement (R 2 ¼ 0.53) with fractional daily light interception and overestimated seasonal PAR received by cowpea by 17 % in the north-south row orientation used. Thirtyminute averages at 1100 h (R 2 ¼ 0.93) and 1430 h (R 2 ¼ 0.91) had the closest correlation to diurnal average PAR incident on cowpea. This study indicates that tall guineense sorghum captures significant amounts of light at low leaf area index (LAI) (< 2.0). Row orientation, time of measurement, plant height and LAI should be considered in calculating light interception in these intercropping systems.

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Section: Introductionmentioning

confidence: 99%

“…While PAR has been measured sporadically in a few intercropping studies (Clement et al. 1992, Prasad et al.…”

Section: Introductionmentioning

confidence: 99%

Diurnal and Seasonal Light Transmission to Cowpea in Sorghum–Cowpea Intercrops in Mali

Gilbert¹,

Heilman²,

Juo³

2003

J Agronomy Crop Science

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“…However, N fertilization can affect this equilibrium between the two species. At higher mineral N availability (e.g., with fertilization of the intercrop), the legume may make greater use of mineral N rather than fixed N, therefore decreasing the %Ndfa (Andersen et al, 2005; Baker and Blamey, 1985; Cardoso et al, 2007; Shisanya and Gitonga, 2007), although some studies have shown that the %Ndfa is highest at intermediate rates of N fertilization (Clement et al, 1992a; Ghaley et al, 2005).…”

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confidence: 99%

Meta‐Analysis of the Effect of Nitrogen Fertilization on Annual Cereal–Legume Intercrop Production

et al. 2014

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Numerous studies have been performed to study the e ect of N fertilization on cereal-legume intercrops, and their results are sometimes con icting. Our objective was to do a meta-analysis on cereal-legume intercrops testing the e ects of N fertilization on land equivalent ration (LER; partial and total LER), yield ratio, and proportion of legume in the mixture of crop grains. is analysis was based on 17 published studies reporting the results of experiments performed in 15 countries on six species of cereals and 10 species of legumes. Experiments were generally based on replacement (50-50, i.e., in the intercrop, each species is sown at half the sowing rate used for the sole crop) or full substitutive (100-100, i.e., the sowing rate for each crop in the intercrop is identical to that for sole crops) designs. Nitrogen fertilization rates ranged from 0 to 180 kg N ha -1 . e e ect of N fertilization and its inter-study variability were analyzed with mixed-e ect statistical models, including study as a random e ect. Results showed that N fertilization had non-signi cant e ects on average LER and average yield ratio but that the inter-study variability of these e ects was large. Nitrogen fertilization was found to signi cantly decrease the grain proportion of the legume in the mixture and the partial LER of the legume in studies based on C 3 cereal intercrops. e database used for the meta-analysis is freely available (http://www6.versailles-grignon.inra.fr/agronomie/Meta-analysis-in-agronomy/Datasets/Dataset-Intercrop).

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“…High amounts of N are removed by harvested soybean seeds (144 and 169 kg N ha −1 , Clement et al, 1992; 150–200 kg N ha −1 , Varvel and Peterson, 1992). This can result in a net N balance (total N fixed − total N removed by harvested seeds) ranging from −74 to +80 kg N ha −1 for soybean and from −44 to +136 kg N ha −1 in other legumes (Peoples and Herridge, 1990; Beck et al, 1991).…”

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confidence: 99%

Effect of Soybean Plant Populations in a Soybean and Maize Rotation

Ennin¹,

Clegg

2001

Agronomy Journal

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findings that, when available, soil N is the main source of N for soybean growth rather than N fixation (Her-Plant population of soybean [Glycine max (L.) Merr.] may influridge and Brockwell, 1988). Thus, growing soybean can ence the residual N contribution to a cropping system and yield beneresult in a net depletion of soil N (Zapata et al., 1987). fits to following cereals. Field studies were conducted from 1994 to 1996 on a N-depleted Sharpsburg silty clay loam soil at Mead, NE High amounts of N are removed by harvested soybean to: (i) determine soybean yield at different plant populations; (ii) seeds (144 and 169 kg N ha Ϫ1 , Clement et al., 1992; investigate residual N, chlorophyll-N-yield relations, and yield bene-150-200 kg N ha Ϫ1 , Varvel and Peterson, 1992). This fits from these different soybean populations to a following maize 12678. Work supported in part by the Canadian Int. Dev. Agency (CIDA).

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Nitrogen and light partitioning in a maize/soybean intercropping system under a humid subtropical climate

Cited by 8 publications

References 9 publications

Diurnal and Seasonal Light Transmission to Cowpea in Sorghum–Cowpea Intercrops in Mali

Diurnal and Seasonal Light Transmission to Cowpea in Sorghum–Cowpea Intercrops in Mali

Meta‐Analysis of the Effect of Nitrogen Fertilization on Annual Cereal–Legume Intercrop Production

Effect of Soybean Plant Populations in a Soybean and Maize Rotation

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