Abstract
Application of the optimal seed rate and adequate amount of nitrogen fertilizer led to increase productivity of hybrid rice under broadcast seed condition. Two field experiments were carried out during 2010 and 2011 rice growing seasons at the Experimental Farm of Rice Research and Training Center, Sakha, Kafr El-Sheikh, Egypt to study the response of Egyptian hybrid rice 1 to four seed rates, i.e. 5, 7.5, 10 and 12.5 kg seed fed-1 and five nitrogen levels, viz 0, 23, 46, 69 and 92 kg N fed-1 under broadcast seeded-rice. The results of this study can be concluded as follows: the seed rate of 7.5 kg seed fed-1 produced the highest mean values of chlorophyll content, dry matter accumulation and leaf area index (LAI (at 65 days after sowing (DAS), while after harvesting also, gave the highest mean values of number of filled grains panicle-1 and grain yield tons fed -1. The plots which planted with 10 kg seed fed-1 recorded the highest mean values of No. of tillers, No. of panicles m-2 without significant differences with the rate of 7.5 kg seeds fed-1, but the heaviest 1000 grain and panicle grain weight. Also, data revealed that Egyptian hybrid rice 1 response positively to application of nitrogen levels up to 92 kg N fed-1, which recorded the highest values of all traits. The highest grain yield was obtained when rice was grown at seed rate 7.5kg seeds fed-1and fertilized with 92kg Nfed-1.
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