Role of potassium fertilizer in improving yield and its components for some sesame varieties under salt-affected soil conditions

Abstract

Improving yield and its components for some sesame genotypes using potassium fertilizer application under salt-affected soil was the desired goal of this study. So, for each site i.e. non-saline site, moderately-saline site and highly-saline site, the experiment was performed in a randomized complete block design (RCBD) using split-plot arrangement with three replications at the Investigational Farm of Tag-El-Ezz Agricultural Research Station, Dakahlia Governorate, Agricultural Research Center, Egypt during 2018 and 2019 successive summer seasons. Three levels of potassium fertilizer i.e. 0, 25 and 50 kg K 2 O fed-1 were assigned in the main plots and three sesame varieties i.e. Shandaweel 3, Giza 32 and Sohag 1 were arranged in the sub-plots. The main effects of sites, potassium fertilizer levels, sesame varieties and their dual and triple interactions were highly significant for all the studied traits. Shandaweel 3 was more salt tolerant variety and it was relevant to grow under salt stress. The potassium rate of 50 kg K 2 O fed-1 was found to be more efficient to mitigate salinity effect and increase yield and its components under salt stress. Therefore, Shandaweel 3 could be recommended under salinity stress with adding 50 kg K 2 O fed-1 to get high yield with high quality and nutrition value.

Impact of Micronutrients Foliar Appliction and Potassium Fertilizer Levels on Productivity and Quality of Sesame Under Sandy Soil Conditions

“…The favorable impact of potassium fertilizer on yield attributes may be due to the important function of potassium in synthesis of carbohydrates, photosynthesis process and cell elongation as well as, potassium improves translocation from leaves to capsules and seeds. Potassium shows a basic role in assimilation, phloem loading and long-distance assimilates transport, in N-metabolism and in storage activities through its function as an activator of many enzymatic responses and in electrochemical activities (Abdelsatar et al, 2021). reported that potassium level of 50 Kg K 2 O/ fad., was found to be more efficient in increasing sesame yield and its components.…”