Responses of two local lemon grass cultivars to water deficit
2001
Somyot Detphirattanamongkhon(King Mongkut's Institute of Technology Ladkrabang, Bangkok (Thailand). Faculty of Agricultural Technology. Department of Plant Production Technology)
At present, the effects of drought stress on crop growth and yield have been well documented. However, influence of drought on growth and yield of lemon grass is rather limited. The aim of this study was to investigate the responses of two local lemon grass cultivars to water deficit. A spit-plot in randomized complete block design was used with 4 replications. Main-plots was two local lemon grass cultivars, Ta-kai-gua (Cymbopogon citratus ) and Ta-kai-haum (Cymbopogon nardus ) and sub-plots consisted of water deficit treatment (receiving irrigation water only 37.5 percent of control throughout the season) and a control that was irrigated as needed throughout the growing season (a total of 920 mm). The results revealed that no relationship between cultivar and water deficit was observed. Ta-kai-gau produced significantly larger stem, leaf and root dry weight than Ta-kai-haum. Water deficit directly affected growth of two local lemon grass at 60 days after planting (DAP) till harvest (at 180 DAP). Considering water treatments, plants under water deficit treatment gave significantly lower stem, leaf and root dry weight, plant height and stem number per hill than that of non-water deficit treatment.
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