Peanut Response to Potassium Fertilizers Under Sandy Saline Soil Conditions

Abstract

Two field experiments were carried out during two successive summer seasons of 2016 and 2017 at Gelbana Village east Suez Canal, North Sinai Governorate, Egypt to study the impact of three sources of K-fertilization (K-sulphate, K-humate and Ksilicate) at different application rates i.e. 0, 20, 40 and 60 kg K2O/fed. on seed yield, yield components, chemical composition and seeds quality of peanut plants (Arachis hypogae L.) variety (Giza6). Also, effect of K fertilization on salt affected soil pH, EC and content of some available macro-and micro-nutrients were studied. The experiment was carried out in split plot design with three replicates. Increasing rate of added K resulted in a significant increase of seed yield and its components where the highest values were observed with K-humate application and the lowest values were associated with Ksulphate treatments. Similarly, significant increases of seeds content of N, P and K (%), Fe, Mn and Zn (mg/kg), protein and oil contents (%) were found with increasing rate of added K. There were no significant differences in the found values of the studied trails and parameters between the three sources of K fertilization in the two growing seasons. Both soil pH and EC (dSm -1 ) were decreased with the incremental addition of K, where the obvious diminish occurred in soil fertilized by K-humate followed by those received K-sulphate. In addition, soil contents (mg/kg) of available N, P, K Fe, Mn and Zn were augmented with raising the rate of K fertilization, where the highest contents of these nutrients were found in the soil fertilized by K-silicate followed by those observed with soils fertilized by K-humate. Results obtained from this research indicate the necessity of K fertilization in salt affected soils to improve its properties, increase soil content of available essential nutrients and their agronomic efficiency.

Potassium Fertilization and Micronutrients Foliar Spray Effects on Peanut Productivity and Its Export Traits Using Giza 6 and Nc 9 Peanut Varieties, in Sandy Soils

“…The positive effect of potassium on weight of seeds per plant was expected since potassium increases number of pods per plant, weight of pods/plant, shelling percentage and hundred seed weight. Confirming results were illustrated by Hemeid (2015), Elbaalawy et. al.…”

“…Table (3) reveals that weight of pods/plant of peanut increased statistically by increasing potassium fertilization rate up to 50 Kg K2O/fad under spraying plants with micronutrients or without it in the first season and up to 75 Kg K2O/fad in the second season. The works of Elbaalawy et. al.…”