Research matters... aspects of coloured shade-nets

It has been suggested that suitably coloured shade-nets could be used to reduce the heat load on crops in summer and modify plant shape.

In the experiments described here, four coloured shade-nets were used to cover four different ornamental crops growing in net-houses.

One net was made from opaque black threads while the others were made from semi-transparent red, blue or yellow threads. All four nets were adjusted to transmit the same amount of light but the semi-transparent ones also altered its spectral composition. The experiments were conducted in the Negev Desert, Israel, where plants of Trachelium 'Purple Winter', Eustoma grandiflorum, Helianthus annuus and Ornithogalum dubium Award of Garden Merit (AGM) were grown under each of the shade-nets. The red, blue, and yellow shade-nets had no effect on the flowering times of E. grandiflorum, H. annuus and 'Purple Winter'.

The most striking effect on the three species was that the shortest stems were found under the blue shade-net. With E. grandiflorum, the longest stems were found under the yellow and red shade-nets. The shade-nets had little effect on the stem length of O. dubium AGM but the plants under the red shade-net flowered before those growing in any other treatment.

Coloured Shade-nets Influence Stem Length, Time to Flower, Flower Number and Inflorescence Diameter in Four Ornamental Cut-flower Crops by Ovadia, Dori, Nissim-Levi, Shahak and Oren-Shamir (2009). Journal of Horticultural Science & Biotechnology 84 (2): 161-166.

Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Before commenting please read our rules for commenting on articles.

If you see a comment you find offensive, you can flag it as inappropriate. In the top right-hand corner of an individual comment, you will see 'flag as inappropriate'. Clicking this prompts us to review the comment. For further information see our rules for commenting on articles.

comments powered by Disqus

Read These Next

Tomorrow's tractors

Tomorrow's tractors

These machines have advanced rapidly over recent years but what does the future hold? Sally Drury looks ahead.

Climbing roses

Climbing roses

Walls, trellises, pergolas and even trees can all be brightened up by these beautiful blooms, writes Miranda Kimberley.

Pest & Disease Factsheet - Mealybugs

Pest & Disease Factsheet - Mealybugs

Vines, tomatoes and tropical plants are among those at risk.

Opinion... Shining a light on trading with Europe

Opinion... Shining a light on trading with Europe

Accurate figures are notoriously difficult to get at, but without doubt the UK imports a great deal of its ornamental plant requirement.

Opinion... Unbeatable delight of quality plants

Opinion... Unbeatable delight of quality plants

Viewing top-quality plants, both growing and on sale, always gives me pleasure.

Editorial ... More analysis and insight from bumper HW issue

Editorial ... More analysis and insight from bumper HW issue

Welcome to this bumper 72-page July edition of Horticulture Week magazine, packed with exclusive analysis, insight and expert advice on the biggest issues impacting all sectors of the UK horticulture industry right now.

Follow us on:
  • Facebook
  • LinkedIn
  • Twitter
  • Google +
Horticulture Jobs
More Horticulture Jobs

Tim Edwards

Boningales Nursery chairman Tim Edwards on the business of ornamentals production

Read Tim Edwards

Ornamentals ranking

Top 30 Ornamentals Nurseries by Turnover 2017

Top 30 Ornamentals Nurseries by Turnover 2017

Tough retail pricing policies and Brexit opportunities drive the top 30 growth strategies.

Pest & Disease Tracker bulletin 

The latest pest and disease alerts, how to treat them, plus EAMU updates, sent direct to your inbox.

Sign up here

Are you a landscape supplier?

Horticulture Week Landscape Project Leads

If so, you should be receiving our new service for Horticulture Week subscribers delivering landscape project leads from live, approved, planning applications across the UK.

Peter Seabrook

Inspiration and insight from travels around the horticultural world

Read more Peter Seabrook articles