EFFECT OF POTASSIUM FERTILIZATION AND HUMIC ACID APPLICATION ON PLANT GROWTH AND PRODUCTIVITY OF POTATO PLANTS UNDER CLAY SOIL

Document Type : Original Article

Authors

Horticulture Res. Institute, Agriculture Research Centre, Giza, Egypt

Abstract

This experiment was carried out during the two successive summer seasons of 2008 and 2009 at  Private Farm in El-Mahala El-Kobra region Ghrabia Governorate, on potato plant  cv. Diamant to study the effect of potassium rates  ( 0,50 and 100 kg K2O/fed) and humic acid  as soil application  ( 0, 2 and 4 kg/fed. as humate potassium)  as well as their interactions on growth,   nutrition  status and productivity of potato under clay  soil.
Application of 100 kg K2O/fed.  was the superior treatment for enhancing   dry weight of straw and tubers,  percentage  of N,P and k  and total uptake  by plant  as well as   total yield/fed.
Treated of  potato plants with humic acid at 4 kg/fed. gave the maximum values of plant growth and plant nutritional statues as well as  yield and its components  with significant differences with 2 kg / fed. with respect to N,P and K (%) and  yield and its components.
 The best interaction treatment for increasing yield and its components  was obtained by  fertilization of potato plants with 100 kg K2O / fed. and  treated of plants with 2 kg /fed.  humic acid.

Keywords

Journal of Plant Production
Volume 2, Issue 7
July 2011
Pages 877-890

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