EFFECT OF POTASSIUM FERTILIZATION AND HUMIC ACID APPLICATION ON PLANT GROWTH AND PRODUCTIVITY OF POTATO PLANTS UNDER CLAY SOIL | ||||
| Journal of Plant Production | ||||
| Article 3, Volume 2, Issue 7, July 2011, Page 877-890 PDF (487.3 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2011.85622 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| E. A. Radwan; Z. S. A. El- Shall; R. A. M. Ali | ||||
| 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 | ||||
| Potato; potassium; humic acid and yield and its components | ||||
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