Seston and Nitrogen Effects on Yield and N, P Uptake of Rice (Oryza Sativa L. cv. Hassawi)

(Abdullah ibn Musa al-Gosaibi)

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Abstract

In a pot experiment conducted during the summer seasons March-June of 1999 and 2000 the effects of seston (100 and 200 g/pot) and different nitrogen levels (0, 50, 100 and 150 kg N/ha) on yield. Yield components and nutrient uptake of Hassawi rice (Oryza sativa) were studied. Yield, yield components and uptake of N and P significantly increased with seston application and with each successive increment of nitrogen. Grain yield increased significantly from 10.5 t/ha without seston to 14.3 t/ha with 200 g/pot seston. Grain yield was the highest under 150 kg N/ha and was significantly superior to both 0 and 50 kg N/ha treatments in both the seasons, but was on a par with the 100 kg N/ha in the second season.
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