Article : Effect Of Irrigation Quality And Different Rates Of Nitrogen And Sulphur Fertilizers On Growth, Seed Yield And Quality Of Canola (Brassica Napus L.) Under Arid Environment Of Saudi Arabia

Title

Effect Of Irrigation Quality And Different Rates Of Nitrogen And Sulphur Fertilizers On Growth, Seed Yield And Quality Of Canola (Brassica Napus L.) Under Arid Environment Of Saudi Arabia

Author

Samir G. Al-Solaimani, Fahad Alghabari

To evaluate the effect of irrigation (I) quality based on total soluble salts (1200 and 10000 mg L-1), nitrogen (N) rates (0, 175, 225 and 275 kg N ha-1) and sulphur (S) application (0, 4 and 6 t ha-1) on canola yield, yield components and seed oil and protein content, a field experiment was conducted at Hada Al Sham (Agriculture Research Station of King Abdulaziz University KAU) Jeddah Saudi Arabia. Experiment was repeated for two consecutive years (2011-12) in Randomized Complete Block Design with split-split plot arrangement and was replicated thrice. Statistical analysis of the treatment means revealed significant reduction in the number of fruits and 1000-seed weight under saline water irrigation. However salinity stress favored seed oil content as proximate analysis resulted in higher accumulation of oil content under highest level of salt water.  Increasing doses of both N and S significant increased plant agronomic (plant height, number of branches plant-1 and 1000-seed weight) and seed protein content and the maximum was at the highest level of applied fertilizers. Interaction of N to S was positive while it was highly negative to salt water for both fertilizers.  Irrigation using salty water with addition of 275 kg N ha-1 and 6 t S ha-1 gave the highest 1000-seed weight and seed yield as compared to irrigation with normal water without addition of N or S respectively. In crux, higher rates of N and S fertilizers may ameliorate the salt water stress by improving growth, yield and grain quality of canola crop. 

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