Net house crop protection effects against salt water and strong typhoon winds – influence of wind speed and salinity effects on plant leaves

This study was conducted to measure tolerance limits against wind and salt for Bitter gourd and chrysanthemums.
The production of these crops in Okinawa, which are struck by many typhoons annually, is the highest in Japan.
For cultivation, widely used net houses have contributed greatly.
Wind resistance required at the time a typhoon strikes leads to lower wind pressure.
However, net houses allow wind to pass through the net in the houses, which causes damage to crops.
As a result of this study, The maximum wind speed at which bitter gourd can be protected from wind damage is about 5 m s^-1. Conditions at wind speeds of 8 m s^-1 can protect leaves from wind damage if leaves can hold without fluttering.
However, bitter gourd salt resistance is insufficient against airborne salt amounts: a NaCl solution with concentration of 0.3% or higher caused damage to leaf surfaces.
Chrysanthemums have superior wind and salt resistance compared to bitter gourd.

International Symposium on New Technologies and Management for Greenhouses – GreenSys2015

M. Tamaki, T. Usui, S. Akamine, S. Tamaki, J. Tsutsumi, T. Takakura

wind resistance, salt resistance, photosynthesis, bitter gourd, chrysanthemum

https://doi.org/10.17660/ActaHortic.2017.1170.105