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Nitrogen transfer between clover and wheat in an intercropping experiment

Pappa, V A; Rees, R M and Watson, C A (2006) Nitrogen transfer between clover and wheat in an intercropping experiment. In: Atkinson, C; Ball, B; Davies, D H K; Rees, R; Russell, G; Stockdale, E A; Watson, C A; Walker, R and Younie, D (Eds.) Aspects of Applied Biology 79, What will organic farming deliver? COR 2006, Association of Applied Biologists, pp. 291-295.

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Summary

A novel approach to the problem of improving nitrogen supply in organic farming is to use intercropping of cereals with a legume to provide nitrogen transfer within a season and/or to following crops. The affects of intercropping were studied in a column experiment using mixtures of winter wheat (Triticum aestivum cv. Claire), with white clover (w.c.) (Trifolium repens cv. Barblanca) and with red clover (r.c.) (Trifolium pratense cv. Britta). The effects of cutting and removal above ground clover material with and without additional soil disturbance were compared to leaving clover plants in situ and intercropped with wheat in a split root design. Wheat and clover plants, as monocultures, were used for the controls. 15N ammonium nitrate solution was applied. The wheat seeds were sown into the column without nitrogen. We found that the cutting treatment produced the highest yield of wheat. Available ammonium-N in the soil was greatest in the clover control treatment for the column with only red clover roots and in the cutting+soil disturbance treatment for the column with only white clover roots. Available nitrate-N was greatest in the soil disturbance treatment in the column with clover and wheat roots for both red and white clover. The cutting treatment produced the highest yield of wheat.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Intercropping; winter wheat; red clover; white clover; N fixation; 15N-labelling
Subjects: Soil > Nutrient turnover
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Crop combinations and interactions
Research affiliation: UK > Other organizations
UK > Scottish Agricultural College (SAC)
UK > Colloquium of Organic Researchers (COR) > COR 2006
Deposited By: MILLMAN, Mrs Carol A
ID Code:10255
Deposited On:20 Dec 2006
Last Modified:12 Apr 2010 07:34
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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