Response of peanut crop to foliar application of some micro nutrients under sandy soil conditions [electronic resource].

Includes references.

Two field experiments were carried out at Ismailia Agriculture Research Station, Agriculture Research Center (ARC) during the two successive summer seasons, 2004 and 2005. The main target of these experiments is evaluating the effect of foliar application of boron, zinc, manganese or iron on seed and pod yields, some yield components as well as nutrient status, oil and protein contents of peanut seeds. Boron was added at rates of 75, 150 and 300 mg BIL as boric acid. Zinc, manganese or iron was applied at rates of 150, 300 and 600 mg nutrient/L in the EDT A form. Data obtained could be summarized as follows: 1. Peanut seed yield and most of the investigated yield components in both seasons as well as pod yield in the first season were significantly increased with B, Zn, Mn or Fe foliar nutrition. The highest values were attained by the foliar spraying with 600 mg/L Fe or Zn, 300 mg/L Mn and 150 mg/L B, in a descending order. 2. Foliar nutrition of B and Mn, up to 150 and 300 mg/L, respectively significantly enhanced seed N, P and K uptake in both seasons then the uptake declined by increasing B and Mn levels. Raising the concentration of spray solution of Zn and Fe up to 600 mg/L increased the values of all nutrients uptake except P-uptake which was not in line with increasing Zn and Fe rates. 3- B-foliar application increased seed Band Mn uptake and decreased Zn, Fe and Cu uptake. Zn-foliar spraying significantly enhanced Zn, B, Mn and Fe in seeds, however Cu uptake took an opposite trend. Spraying the plants with Mn and Fe increased uptake of the other micronutrients but antagonistic relationships were observed between Mn or Fe spraying and uptake of Zn and Cu. 4- Foliar feeding with the micronutrients under investigation significantly increased oil and protein contents in seeds. The treatment of 300 mg BIL gave the highest value of oil in seeds and the treatment of 600 mg Fe/L gave .the highest value of protein in seeds. Thus, under sandy soils conditions, spraying with concentrations of 600 mg Fe, 600 mg Zn, 300 mg Mn and 150 mg BIL at 30 and 45 days old of peanut plants gave the highest yields of peanut pods and seed and achieved a balance between macro- and micronutrients in plants and the best seed nutritive, oil and protein contents.

Summary in Arabic.

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