Effect of shade level and mulch type on growth, yield and essential oil composition of damask rose (Rosa damascena Mill.) under mid hill conditions of Western Himalayas

PLoS One. 2019 Apr 4;14(4):e0214672. doi: 10.1371/journal.pone.0214672. eCollection 2019.

Abstract

A field experiment was conducted at the experimental farm of CSIR-Institute of Himalayan Bioresource Technology, Palampur, India for two consecutive years (2015-16 and 2016-17). The aim of the study was to test the hypothesis whether different shade level and mulch type would influence the growth, flower yield and essential oil profile of R. damascena. Yield attributes viz., numbers of flowers plant-1, fresh flower weight plant-1, flower yield, and essential oil yield were significantly higher under open sunny conditions as compared to 25% and 50% shade levels. However, plants grown under 50% shade level recorded significantly higher plant height (cm), plant spread (cm) and the lowest numbers of branches as compared to control. Among mulches, black polyethylene mulch recorded significantly higher growth, and yield attributes of damask rose as compared to other mulches. Black polyethylene mulch recorded 74.5 and 39.2% higher fresh flower yield as compared to without mulch, during 2015-16 and 2016-17, respectively. Correlation studies showed a positively significant correlation between quality and quantity traits. A total of twenty-six essential oil compounds were identified which accounted for a total of 88.8 to 95.3%. Plants grown under open sunny conditions along with the applications of black polyethylene mulch produced a higher concentration of citronellol and trans-geraniol. Damask rose planted in open sunny conditions and mulched with black polyethylene sheet recorded significantly higher flower yield.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Environment
  • Flowers / growth & development
  • Flowers / radiation effects
  • India
  • Microclimate
  • Oils, Volatile / chemistry*
  • Plant Development / radiation effects
  • Rosa / growth & development*
  • Rosa / radiation effects

Substances

  • Oils, Volatile

Grants and funding

The source of funding that supported the work, received from Scientific and Engineering Research Board (SERB), department of Science and Technology, GOI, New Delhi, India. Specific grant numbers: SB/S4/AS-134/2013 Initials of authors who received each award: Rakesh Kumar. Full names of commercial companies that funded the study or authors: No commercial funding was received. Initials of authors who received salary or other funding from commercial companies: No salary was received from commercial funding. URLs to sponsors’ websites: http://www.dst.gov.in. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.