Nitrogen Fertilization and Foliar Application with Mn and Cu in Green Pea (Pisum sativum L.) Using 15N Stable Isotope

Hashim, M. E.; Hekal, Mohamed Ashraf

doi:10.21608/jssae.2022.154815.1096

Nitrogen Fertilization and Foliar Application with Mn and Cu in Green Pea (Pisum sativum L.) Using 15N Stable Isotope

Document Type : Original Article

Authors

M. E. Hashim ¹
Mohamed Ashraf Hekal ²

¹ Plant Research Center Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Egypt

² Soil and Water Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Egypt

10.21608/jssae.2022.154815.1096

Abstract

Pea crop grown on sandy soil under field conditions was fertigated by three rates of nitrogen i.e. 138.1, 172.6 and 207.1 kg N ha^-1 and treated with four treatments of foliar applied Cu and Mn includes control. The results revealed that all experimental treatments significantly enhanced the crop yield and growth attributes (pods fresh weight, pods dry weight, seeds dry yield, pods cover dry weight and shell out). Similarly, it improves the chemical composition like protein content in dry seeds, content and uptake of N, Mn and Cu. These effects were more pronounced especially at higher N rate (N₃, 207.1 kg N ha^-1) except shell out % where the highest value was detected at N₁ (172.6 kg N ha^-1). In the same time, spraying with Mn has a significant effect on pea plants for example dry matter yield of pea seeds recorded 2.77 Mg ha^-1 higher than the untreated control. Similarly, either N or Mn and Cu uptake were enhanced by foliar application of Mn as a micronutrient source comparable to the untreated control. In this respect, Mn plus Cu induced the best values of pea growth and yield and nutrients uptake comparing to individual treatments. Application of isotope dilution technique showed that the portion of N gained by seeds of pea crop from chemical N fertilizer and NUE were higher under N₃S₃ (207.1 kg N ha^-1, 240 g Mn ha^-1 and 240 g Cu ha^-1) treatment than other treatments.

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