Effect of drip irrigation method, nitrogen source, and flushing schedule on emitter clogging

Mohamed Yousif Tayel, Sabreen Khalil Pibars, Hani Abdel-Ghani Mansour

Water Relation and Field Irrigation Department, National Research Center, Giza, Egypt.

DOI: 10.4236/as.2013.43020                

Abstract

Field experiments were carried out at the National Research Center farm, Nubaria area, Behura Governorate, Egypt, to study the effect of nitrogen source, flushing schedule and irrigation method on emitter clogging. Peanut Giza 5 variety (Arachishy pogaea L.) was planted in sandy soil during two successive growing seasons (2010-2011) in the 1st week of May and harvested after 130 days. Treatments used are: 1) two irrigation methods: surface drip irrigation and sub-surface drip irrigation (SDI; SSDI), 2) nitrogen source (NS):NH₄NO₃, (NH₄)₂SO₄ and Ca(NO₃)₂ (NS₁, NS₂ and NS₃) and 3) flushing number (FL) 0, 1 and 4 (FL₁, FL₂; FL₃). The experiments design was split-split plot and three replicates were used. Data obtained were subjected to statistical analysis. The main effects of treatments used on clogging per cent could be written the following ascending orders: SDI < SSDI, FL₃ < FL₂ < FL₁, NS₁ < NS₂ < NS₃. Concerning the 1st interaction the following ascending orders denote their effects on clogging percent: SDI × FL₃ < SDI × FL₂ < SDI × FL₁, SDI × NS₁ < SDI × NS₂ < SDI × NS₃, SSDI × FL₃ < SSDI × FL₂ < SSDI × FL₁, SSDI × NS₁ < SSDI × NS₂ < SSDI × NS₃, FL₁ × NS₁ 1 × NS₂ < FL₁ × NS₃, FL₂ × NS₁ < FL₂ × NS₂ < FL₂ × NS₃ and FL₃ × NS₁ < FL₃ × NS₂ < FL₃ × NS₃. The differences between any two treatments and/or any two interactions in clogging percent were significant at the 5% level. The effect of the 2nd interaction on clogging percent was significant at the 5% level. The maximum value of clogging (20.18%) and the lowest one (3.9%) were archived in the interactions: SSDI × FL₁ × NS₃ and SDI × FL₃ × NS₁, respectively.

Keywords

Irrigation Method; Nitrogen Source; Flushing Number; Water and Soil Analysis; Emitter Clogging

Conflicts of Interest

The authors declare no conflicts of interest.

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