Studies on the Productivity of Egyptian Clover and Oats under Intercropping

Singh, Virendra; Joshi, Yadav Prasad; Verma, S. S.

doi:10.1017/s0014479700015167

Cited by 11 publications

(12 citation statements)

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“…Intercropping berseem clover with small grain cereals can increase total dry‐matter (DM) yield and forage quality, reduce fertilizer needs and increase subsequent crop yields (Singh et al. , 1989; Reynolds et al.…”

Section: Introductionmentioning

confidence: 99%

The productivity of oats and berseem clover intercrops. I. Primary growth characteristics and forage quality at four densities of oats

Ross

King

O’Donovan

et al. 2005

Grass and Forage Science

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Berseem clover (Trifolium alexandrinum L.) was sown as an intercrop with oats (Avena sativa L.) at 0, 30, 60, 90 and 240 oats plants m )2 in May in 1999 and 2000 in Alberta, Canada. Forage yield and quality were measured at 10-d intervals between 35 and 88 d after planting (DAP). Yield is defined as the biomass above 6 cm of the soil surface. The dry-matter (DM) yield of berseem clover in sole crops increased by 5-10 g m )2 d )1 between 35 and 55 DAP and then increased by 21-28 g m )2 d )1 between 55 and 75 DAP. The DM yields of oats sown at 240 plants m )2 increased by 26-28 g m )2 d )1 over the whole period from 35 to 75 DAP. Oats were the dominant component in the intercrops, even at low densities of oats. Berseem clover grown with 60 oats plants m )2 received only 0AE24 of the incident light when shading by oats peaked at 65 DAP. DM yields of berseem clover in intercrops with 60 oats plants m )2 averaged 0AE14-0AE32 of the yields of berseem clover sole crops. Between 35 and 88 DAP in 2000, the crude protein (CP) concentration of berseem clover sole crops declined linearly from 310 to 180 g kg )1 DM, and the CP concentration of oats exhibited a quadratic response, declining from 350 g kg )1 DM at tillering to 110 g kg )1 DM at the soft dough stage. The mean CP concentration of berseem clover in intercrops with 60 oats plants m )2 was 25 g kg )1 less than in berseem clover sole crops, indicating that competition by oats reduced the CP concentration of berseem clover. At later sampling dates, CP and DM yields of intercrops with oats at 60 plants m )2 equalled those with oats at 240 plants m )2 . The addition of berseem clover to oats in intercrops at 60 oats plants m )2 reduced the neutraldetergent fibre concentration by 30 g kg )1 DM compared with oats alone. Oats were very competitive as a companion crop for berseem clover. Adding berseem clover to oats increased forage quality and may provide for increased intake and digestibility of forage to support higher livestock productivity.

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Section: Introductionmentioning

confidence: 99%

The productivity of oats and berseem clover intercrops. I. Primary growth characteristics and forage quality at four densities of oats

Ross

King

O’Donovan

et al. 2005

Grass and Forage Science

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“…A late single cut of spring cereals produced greater forage yield than a double cut in Quebec, Canada (McElroy and Gervais, 1983) and in Spain (Royo, 1999). Harvest management of berseem clover–oats intercrops usually involves two or more cuts (Singh et al. , 1989; Welty et al.…”

Section: Introductionmentioning

confidence: 99%

The productivity of oats and berseem clover intercrops. II. Effects of cutting date and density of oats on annual forage yield

Ross

King

O’Donovan

et al. 2005

Grass and Forage Science

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Annual forage yields of intercrops of berseem clover (Trifolium alexandrinum L.) and oats (Avena sativa L.), as affected by timing of initial harvest and sowing rate of oats, were investigated. Berseem clover was intercropped with oats at 0, 30, 60, 90 and 240 plants m )2 of oats in 1999 and 2000 in Alberta, Canada. Cutting date treatments involved initial harvest at 10-d intervals between 35 and 88 d after planting (DAP), and one or two subsequent harvests of regrowth. Total intercrop dry-matter (DM) yield averaged 12AE9-13AE3 t ha )1 with proportions of 0AE21-0AE43 of berseem clover in the forage. Treatments with an initial cut at the silage stage of oats (76 DAP in 1999, 88 DAP in 2000, at about soft-dough stage of oats) had greater yields of oats, lower yields of berseem clover, and lower proportions of berseem clover in total annual yields than treatments with an earlier initial cut. Total crude protein (CP) yield was greater with an initial cut at 65-66 DAP than with a silage-stage initial cut. With an initial cut at 35 DAP (before stem elongation of oats) or after 65 DAP (after heading of oats), yield potential of oats was sometimes reduced compared with silage-stage treatments, but this was balanced by a greater yield of berseem clover. The impact of harvest timing on total yield decreased as the proportion of berseem clover in the intercrops increased. With decreasing density of oats, DM yield of first-cut intercrops and total DM yield of oats decreased, while regrowth and total DM yields of berseem clover increased. Intercrops with oats at 60 plants m )2 had equal or greater total DM and CP yields than intercrops with 240 plants m )2 of oats. For intercrops with oats at 60 plants m )2 , with initial cuts at 65-66, 75-76, or 88 DAP, yields of regrowths were 0AE30-0AE35, 0AE16-0AE26 and 0AE09 of the total yield respectively. Oats-berseem clover intercrops showed potential to manipulate the pattern of annual forage yield and to provide flexibility of harvest without reducing annual yields.

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“…Singh et al (1989) described oats and berseem clover as the two most important cultivated forage crops of the sub-tropical world. Growing oats with alfalfa can substantially increase first cut forage yields (Lanini et al 1991).…”

mentioning

confidence: 99%

“…Research on berseem-oat intercrops includes assessment of effects of seeding methods (Singh et al 1989), potential rotation benefits (Ghaffarzadeh 1997;Sheaffer et al 2001), and cultivar effects (Holland and Brummer 1999). In India, berseem-oat intercrop produced higher yields than oats alone (Singh et al 1989).…”

mentioning

confidence: 99%

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Seeding rate effects in oat-berseem clover intercrops

Ross¹,

King²,

O’Donovan³

et al. 2003

Can. J. Plant Sci.

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Ross, S. M., King, J. R., O'Donovan, J. T. and Izaurralde, R. C. 2003. Seeding rate effects in oat-berseem clover intercrops. Can. J. Plant Sci. 83: 769-778. The sustainability of cereal cropping systems may be improved by the addition of legumes. The effects of seeding rate were studied for intercrops of berseem clover (Trifolium alexandrinum L.) and oats (Avena sativa L.). Bigbee berseem clover, an annual forage legume, was intercropped with oats on a Black Chernozemic soil at Edmonton, Alberta, in 1996 and 1997. Berseem dry matter (DM) yields were greatly reduced by increasing oat plant density. There was a linear decline in berseem DM with increasing oat DM or oat tiller density. The relationship between oat plant density and berseem DM was nonlinear and varied between years and harvests. Berseem yield reductions varied from 44 to 82% with target densities of 100 oat plants m -2 . Effects of berseem seeding rate (BSR) on oats varied between years. Increasing BSR from 6 to 24 kg ha -1 decreased oat tillering, oat DM and oat plant DM by 22-51, 0-57 and 8-51%, respectively, and increased oat tiller DM by 0-18%, with oats at 10 to 20 plants m -2 . Differences between years were likely due to environmental factors and relative emergence times. After a silage-stage harvest, oat regrowth was negligible but berseem regrowth averaged 3.1 Mg ha -1 DM. . Pour cela, ils ont semé du trèfle d'Alexandrie Bigbee, légumineuse fourragère annuelle, avec de l'avoine sur un tchernoziom noir à Edmonton (Alberta) en 1996 et 1997. Le rendement en matière sèche du trèfle diminue considérablement quand on accroît la densité de peuplement de l'avoine. La teneur en matière sèche du trèfle diminue de façon linéaire avec la hausse de la teneur en matière sèche de l'avoine ou la densité des talles. Le lien entre la densité des peuplements d'avoine et la quantité de matière sèche du trèfle n'est toutefois pas linéaire et varie d'une année et d'une récolte à l'autre. La baisse de rendement du trèfle varie de 44 % à 82 % à une densité de 100 plants d'avoine par mètre carré. L'incidence du taux de semis du trèfle sur l'avoine varie d'une année à l'autre. Quand il passe de 6 à 24 kg par hectare, le tallage de l'avoine, sa teneur en matière sèche et la concentration de matière sèche du plant diminuent respectivement de 22 à 51 %, de 0 à 57 % et de 8 à 51 % alors que la teneur en matière sèche des talles progresse de 0 à 18 % à la densité de 10 à 20 plants d'avoine par mètre carré. Les variations annuelles dérivent sans doute de facteurs environnementaux et du temps relatif nécessaire à la levée. Après une récolte pour l'ensilage, l'avoine repousse peu, mais le trèfle d'Alexandrie donne en moyenne 3,1 Mg de matière sèche par hectare.

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Studies on the Productivity of Egyptian Clover and Oats under Intercropping

Cited by 11 publications

References 1 publication

The productivity of oats and berseem clover intercrops. I. Primary growth characteristics and forage quality at four densities of oats

The productivity of oats and berseem clover intercrops. I. Primary growth characteristics and forage quality at four densities of oats

The productivity of oats and berseem clover intercrops. II. Effects of cutting date and density of oats on annual forage yield

Seeding rate effects in oat-berseem clover intercrops

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