Response of Two Potato Cultivars to Organic Fertilization and Potassium Foliar Application

Abstract

Potato cultivation is quite demanding and adequate fertilization is a key factor for maximizing yield and producing tubers of high quality. So, two variety of potato (Sponta and Lady Rosita) were used to evaluate its response to foliar application of two sources of potassium under organic fertilization during the two successive winter seasons of 2020/2021 and 2021/2022 at privet farm at Nabarouh city, El-Dakahlia Governorate under open field conditions. For this purpose, the experiment was laid out in split-split plot design with three replications having two variety of potato were arranged as main plot, two type of compost (plant and animal) were assigned at random in sub-plot, whereas three sources of potassium foliar application (without, potassium silicate and mono potassium phosphate were allocated in the sub-sub-plots.According to the results, Spunta cultivar showed a significant superiority in all vegetative growth, chemical content, and yield as well as tuber quality. Addition of animal organic fertilization achieved the highest value of mentioned parameters. As for the effect of foliar application, potassium silicate results the highest value with the most parameters except P%, K%, and dry matter % during both seasons as well as specific gravity in the second season, which recorded the highest values with foliar application with mono potassium phosphate. This study demonstrated that utilization of animal organic with foliar application with potassium silicate was effective with Spunta cultivar.

Effect of Potassium Sources on Some Potato Cultivars Grown in Sandy Soil by Using Pivot Irrigation System

“…Spraying Cara cultivar with KCit, followed by KTS increased number of tubers/ plant and total yield /ha., whereas spraying spunta cultivar with KCit, followed by Cara cultivar with KCit increased average tuber weight in both seasons. In the same line , (15) indicated that the highest average tuber weight, number of tuners/ plant and total yield /ha of potato were obtained with the interaction between spraying spunta cultivar and spraying with potassium silicate than spraying Lady Rosita cultivar with potassium silicate.…”

“…Spraying Santana cultivar with KCit followed by KTS produced the tallest plants and recorded maximum value of shoot dry weight, whereas spraying at 90 days after planting in both seasons ( Table 2). Spraying Spunta, Santana , Cara, Lady Rosetta and Hermes with different sources of potassium , i.e., KCit, KSil, KF and KTS increased shoot dry weight/ plant compared to the same cultivars with control (spraying with water) in both seasons.In this regard, (15) showed that the interaction between spraying Spunta cultivar and spraying with potassium silicate showed a significant superiority in all vegetative growth, i.e., plant height , fresh weigh and dry weight / shoots than spraying Lady Rosetta cultivar with potassium silicate.…”