University of Khartoum

Effects of Irrigation Interval, Urea and Gypsum on N, P and K Uptake by Forage Sorghum on Highly Saline-Sodic Clay

Effects of Irrigation Interval, Urea and Gypsum on N, P and K Uptake by Forage Sorghum on Highly Saline-Sodic Clay

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Title: Effects of Irrigation Interval, Urea and Gypsum on N, P and K Uptake by Forage Sorghum on Highly Saline-Sodic Clay
Author: Mustafa, M.A; etal
Abstract: The effects of three irrigation intervals (7, 10 and 15 days), four nitrogen levels (ON, IN, ON and 3N where 1N = 43.8 kg Nitta), and 0 or 11.9 tons fha gypsum on leaf N, P and K uptake by forage sorghum grown on a highly saline—sodic by soil were investigated in two successive seasons. The two seasons' data consistently showed that both leaf-N and leaf-K increased sig-nificantly with increasing N-rate and by splitting the same quantity of irrigation water into more frequent irrigation's. Gypsum had no consistent effect. The responses of both leaf-N and leaf-K to nitrogen rates were significantly linear and a linear response of dry matter yield to leaf-N was also observed. P uptake was improved by more frequent irrigations in the first cut-ting of 1978, but was not otherwise affected by treatments.
URI: http://khartoumspace.uofk.edu/123456789/22299


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