inserted by ETS editorial staff
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English
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Authors : A. Altissimo, L. Peserico
Journal / Proceedings: 2nd ETS Confenrence Proceedings
Bibliographic record:
2010 Angers full Papers
The role of K sources and N:K ratio in retarding the effect of drought on a lawn of cool-season grasses.
Lolium perenne and Poa pratensis are coolseason turfgrasses often mixed together and widely used
for in sub-continental and mediterranean zones where, during the late spring and summer months,
rainfalls are lower than the evapotranspiration (ET) and grasses suffer of drought stress. The water
deficit (Rainfall < ET) can widely vary in terms of lenght and intensity, from few days without rain
and/or few mm, to up to the entire period or ET. In case of water deficiency or restrictions of use of
water for turf irrigation, cool season grasses may deeply suffer drought stress. Different strategies
are possible: accurate irrigation, use of tolerant varieties (Bingru Huang, 2007), enhancement
of the soil Water Holding Capacity via superabsorbents, nutrition strategies such as e.g. larger
application of potassium (Shearman R.C., K.S.Erusha and L.A.Wit, 2005).
Potassium is known for reducing drought stress due to the role of K in the control of the transpiration
(Carrolm M.J., and A.M. Petrovic, 1991) (Trenholm L.E., R.N. Carrow, R.R.Duncan, 2001) but
not many studies are available about the effectiveness of different sources of potassium.
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