Pigeonpea (Cajanus cajan (L) Millsp.) nutrient accumulation as influenced by rhizobium inoculation and nitrogen application in Antigua soils
1995
Marsh, D. | Marsh, L. | Cooper, B. (Lincoln University, Jefferson City (USA). Dept. of Agriculture)
Methods which improve the nutrient status of pigeonpea plants without the addition of expensive commercial fertilizer can benefit farmers in the Caribbean and other tropical areas. Yields of this grain legume have been shown to increase significantly when the crop received adequate nutrition. Studies were conducted to evaluate the nutrient status of pigeonpea plants treated with various combinations of nitrogen fertilizer levels and Rhizobium inoculants. Rhizobium strains influenced nitrogen content of plants grown at two Antigua sites. Plants treated with strain 3384 produced nodules which were more effective nitrogen fixers than other strains tested. This resulted in higher levels of nitrogen in the stems and leaves of the tested plants. Plots treated with 45 kg/ha nitrogen showed significant reduction in nodulation. Shoot accumulation of P, K, Ca and Al was influenced by Rhizobium inoculation. Plants treated with Strain 3384 had the highest P and K accumulation and those receiving no inoculum had the highest Al content.
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