Title

Bi-cropping spring field bean (Vicia faba) and wheat (Triticum aestivum)

for UK whole crop forage production

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Resource explained: 
Cereals are known to contain a high level of carbohydrate, but a lower crude protein level limits their suitability as whole crop forage when grown as a monoculture. Bi-cropping can provide a more nutritionally-balanced forage, but crop species and how they are arranged spatially is important. A study conducted at the Royal Agricultural University (RAU) in spring 2015 explored the effects of spatial arrangements of bi-crop mixtures of wheat and beans with different growth characteristics on resource use efficiency and forage quality. 4 drilling patterns incorporating 2 bean cultivars (Fuego and Maris Bead) and sole and bi-crops of the wheat variety Paragon were trialled.
Findings & recommendations: 
  • When compared to mono-cropping, bi-cropping can help you maximise on the use of natural resources such as light, water, and nutrients, whilst also boosting forage dry matter and nutritional values.

The results showed that:

  • Crops grown in the 2 rows of wheat to 2 rows of beans alternate row arrangement performed better than broadcast or sole wheat, indicating the mutual benefits that can come from combining species.
  • Bi-cropping outperformed sole wheat cropping in relation to chlorophyll content, the ability to catch light, and wheat grain and whole crop wheat forage crude protein (CP) levels.
  • Light and chlorophyll is used more effectively in a bi-crop mixture (particularly alternate rows of bi-cropping) than a sole wheat crop.
  • The bean cultivars influenced CP more than the drilling patterns.
  • The cultivar Maris Bead consistently outperformed Fuego in relation to bean grain CP and whole crop bean CP.
  • The bean cultivars had an equal influence on the chlorophyll content, wheat grain CP and whole crop wheat CP.
  • Fuego bean cultivar intercepted more light than the Maris Bead bean.

(Image above shows 1 x 1 spatial arrangement; 1 row of wheat, then 1 row of beans. Header image: 2 rows of wheat followed by 2 rows of beans. Photo credits: RAU)

Author(s): 
Kamalongo, D, Cannon, N, Davies, P & Conway, J
Organisation: 
Royal Agricultural University
Funders: 
The John Oldacre Foundation
Copyright: 
Creative Commons Licence
Evidence: 
Academic research
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