Effect of Regulated Deficit Irrigation and Compost Tea on Canola Yield and Quality under Drip Irrigation.

Document Type : Original Article

Authors

1 National research centre

2 Agricultural engineering research institute (AEnRI) Agricultural research center

Abstract

Using a split split plot design; field experiments were carried out over two consecutive growing seasons to study the effects of the following: regulated deficit irrigation: 100% ETc throughout the growing season (IR1), applying an irrigation shift and skipping the next during the vegetative growth (IR2), flowering (IR3), and senescence (IR4) stages; compost tea dose: 142.8 (C1), 95.2 (C2), and 47.6 l/ha (C3); and variety: (Serw 4 and Bactol 1) on both seed and oil yield and water productivity of canola. Results indicated that skipping irrigation shifts and decreasing the applied compost tea dose affected the seed and oil yield of the canola. Water stress must be avoided at the flowering stage as it decreases seed yield. Canola can be water-stressed at vegetative growth and Senescence stages achieving comparative growth characteristics and saving 14.6% of irrigation requirement.
Serw 4 variety had higher productivity than Bactol 1. The highest seed yield of Serw 4 (2380 kg/ha) was obtained for (IR2×C1) while the minimum one (2023 kg/ha) was obtained for (IR3×C3), respectively. The highest oil yield of Serw 4 (1576kg/ha) was obtained for IR2 x C1 and the lowest (1190kg/ha) was obtained for IR2×C1 and IR3×C3, respectively.
Compost tea acted as an organic fertilizer for plant nutrition and improved soil characteristics. Its main effect could be written in ascending order C3<C2<C1. The highest water productivity values were 1.3 and 1.25 (kg/m3) obtained by IR2×C1 while the lowest values were 1.15 and 1.1(kg/m3) obtained by IR3×C3 for Serw 4 and Bactol 1, respectively.

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History

  • Receive Date: 27 November 2024
  • Revise Date: 02 June 2025
  • Accept Date: 29 June 2025

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