Effect of nitrogen and zinc application and boronated saline-sodic water on the herb yield, oil content and nutrient composition of palmarosa (Cymbopogon martinii)

Sharma, Y.K.; Pal, B.

Indian Journal of Agricultural Sciences 71(2): 102-105


ISSN/ISBN: 0019-5022
Accession: 003419638

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A pot experiment was conducted to study the effect of nitrogen (N)-, zinc (Zn)- and boron (B)-rich saline sodic water on herb yield, oil content and mineral composition of palmarosa (Cymbopogon martinii). Three levels of B in water (2.5, 5.0 and 10.0 mg/litre) having an EC of 8 dS/m and a sodium adsorption ratio of 12.5; three N levels (40, 80 and 120 kg/ha) and four Zn levels (control, 15, 30 and 45 kg ZnSO4/ha) were tested on the sandy loam soil. On the basis of two years average data an extent of significant decrease could be noted in the range 50.61 to 45.00 g/pot in herb yield, 0.65 to 0.60% in oil content, 1.45 to 1.43% in N, 0.218 to 0.214% in P, 0.88 to 0.85% in K and 30.13 to 28.61 ppm in Zn contents while an increase in the range of 0.45 to 0.48% in Na and 13.27 to 18.19 ppm in B contents at third cutting with the use of 10 ppm B-rich saline sodic water over 2.5 ppm B level. Significant yield response to N and Zn application was observed upto 120 kg N and 45 kg ZnSO4/ha. The N, K and Zn contents increased while that of Na and B contents decreased with an increase in the level of N and Zn fertilizer application. However, the P content increased with N and decreased with Zn application. Neither N nor Zn application affect markedly the oil content in palmarosa. Results indicated that N and Zn fertilizer application would be beneficial in increasing palmarosa production when irrigation water contains more amounts of B along with salts and Na.