الفهرس 
ContentsOnly 14 pages are availabe for public view
 |  | from | 232 |  |  |
| | | from | 232 | | |
Abstract
The present study was conducted at Agricultural Research Station Farm, Giza, Egypt (30°01’14.6”N 31°12’41.1”E) during the two successive winter seasons of 2013/2014 and 2014/2015 on potato crop (Solanum tuberosum L.) cultivar grown in a clay loam soils. To investigate the effect of nitrogen, potassium fertilizer rates and boron foliar application as well as their interactions on yield and yield components, plants nutrients concentration and uptake and quality attributes of potato plants. The experimental layout was a split-split-plot system in a randomized complete blocks design with three replications. Nitrogen fertilizer levels were arranged as the main plots, potassium fertilization treatments were assigned at random in sub-plots, whereas the boron treatments were allocated in the sub -sub –plots. The experiment consisted of three factors such as nitrogen and potassium fertilizer levels and boron foliar application as well as their interactions. The obtained results could be summarized as follow: Significant influence on plant height, fresh weight and dry weight in foliage and tuber at 90 days were observed due to application of nitrogen, potassium rates and foliar application of boron except for stem number. Different nitrogen and potassium rates influenced significantly on number of tuber plant-1, average tubers weight (g) and tuber yield (ton fed -1). N, P and K uptake of potato plants was significantly increased by increasing nitrogen or potassium fertilizers and their interaction in foliage and tuber of potato plants. The interaction between nitrogen and potassium fertilization was insignificant on specific gravity and dry matter percentage of tuber except for starch was significantly. Conclusion: yield and its components of the potato variety spunta can be improved with the application of N and K fertilizers. Hence, application of 150 kg N fed-1 in the form of ammonium sulphate ,96 kg K2O /fed in the form potassium sulphate and foliar application of boron are found to be the appropriate rates for optimum productivity of potato plants in clay soil.