期刊
JOURNAL OF ESSENTIAL OIL BEARING PLANTS
卷 -, 期 -, 页码 -出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/0972060X.2023.2256789
关键词
EO yield; Irrigation frequencies; Lemongrass var. CKP-25; Net returns; Citral (citral a plus citral b) content; Geraniol content
In this study, three cultivars of Cymbopogon species were evaluated under different irrigation frequencies. Lemongrass var. CKP-25 showed the highest essential oil yield, while Jamarosa var. RRL(J)CN-5 had the highest net returns. Lower irrigation frequencies had a positive effect on the essential oil content and secondary metabolite production.
In the present study, three cultivars of Cymbopogon species viz., Lemongrass var. CKP-25, Himrosa var. IIIM(J)CK-10 and Jamarosa var. RRL(J)CN-5 were assessed with five levels of irrigation frequencies viz., 0.20 IW, 0.40 IW, 0.60 IW, 0.80 IW and 1.00 IW, in three consecutive years (2019-2022). In the study, irrigation was scheduled at 5 cm depth and performed as per the IW: CPE ratio. The amount of water was applied as per the levels of irrigation frequency from lower to higher and to meet the ratio of cumulative pan evaporation (CPE). Furthermore, increase in the levels of irrigation frequency increased the essential oil yield. Interaction among the cultivars of Cymbopogon species with the different levels of irrigation frequencies, Lemongrass var. CKP-25 proved significantly the highest essential oil yield (209.97, 389.12 and 406.57 kg ha(-1)) during 1(st), 2(nd )and 3(rd )year, respectively. Similarly, in 2(nd) and 3(rd) years the net returns were found to be highest in Jamarosa var. RRL(J)CN-5 (Rs. 454627.00 and 502990.30 ha(-1)), respectively at same levels of irrigation frequency. The benefit: cost ratio was found to be superior with treatment receiving irrigation at 1.00 IW. However, percentage of essential oil content, secondary metabolite production viz., Lemongrass, citral (citral a + citral b) content percentage (82.47 +/- 2.12), Himrosa and Jamrosa, geraniol and geranyl acetate percentage (76.23 +/- 1.46 and 8.49 +/- 1.03) and (61.12 +/- 1.58 and 25.88 +/- 1.11), respectively, highest at 0.20 & 0.40 IW, while both decreases at higher levels of irrigation frequency (1.00 IW) in all the three consecutive years.
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