Interactive effects of irrigation water salinity and soil fertility on salinity and sodicity build-up in soil and yield and cation composition of palmarosa (Cymbopogon martinii) and lemongrass (Cymbopogon flexuosus)

Arun Prasad; Anwar, M.; Patra, D.D.; Singh, D.V.

Journal of the Indian Society of Soil Science 49(1): 178-187

2001


Accession: 003821151

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Abstract
The experiment was conducted during 1991-93 in an open-bottomed reinforced concrete cemented cylindrical barrel embedded in the field in Lucknow, Uttar Pradesh, India. The sustained use of saline water increased the pH, ECe, and SARe of irrigated soils irrespective of the crop species and soil fertility. The herb and oil yield of palmarosa significantly decreased at high salinity while that of lemongrass consistently decreased with increase in salinity. Increasing soil fertility increased the herb and oil yield of palmarosa but had no effect on lemongrass. The concentration of Na in the shoot tissue of palmarosa and lemongrass increased with increase in salinity. Palmarosa had lower concentration of Na and higher capacity to maintain their K and Ca concentrations in the shoot tissues at high salinity than lemongrass. A high accumulation of Na and low concentration of K and Ca in shoot tissues was in accordance with the drastic herb yield reduction in lemongrass under increased salinity stress.