Response of some kenaf (hibiscus cannabinus l.) cultivars to plant density and nitrogen fertilization [electronic resource].

Includes references.

Two field experiments were carried out as split split plot design with four replicates in the Experimental Farm of Kafr EI-Hamam Agric. Res. Station, EI-Sharkia governorate Egypt, during the two successive summer seasons of 2007 and 2008. Quantitative and qualitative crop characters of the three kenaf cultivars (Tianung, Hindi and Giza3) as responded to nitrogen levels (20, 40 and 60kg. N/fed) under three plant densities (25,50 and 75 plants/m² ) were studied. The combined analysis for the results showed significant differences among three kenaf cultivars under study. Tianung cultivar was superior in green yield characters followed by Hindi cultivar and the local cultivar Giza3 in descending order. On the other hand, the local cultivar Giza3 outyielded significantly the other two kenaf cultivars in seed yield characters. Hindi cultivar ranked intermediate position in all studied traits between Tianung and Giza 3 cultivars. The plant density (50 plants/m²) caused remarkable increase in all studied characters. The greatest nitrogen level i.e., 6Okg/fed achieved significant increase in green yield characters, however, 40 kg N/fed. was recommended to produce the best seed yield characters. Cultivar (C) x plant density (D) interaction had a significant effect on green yield/fed, and fiber fineness. CultivaJr (C) x nitrogen (N) interaction had a significant effect on fiber fmeness and oil yield/fed. DxN interaction had a significant effect on seed ,and oil yields/fed. Correlation coefficient was highly significant and positive between green yield/fed and each of green yield/plant, plant height, technical length, fiber length and fiber yield/fed. However, seed yield/fed was highly significant and positive correlated with seed yield/ plant, oil yield/ fed., No. of capsules/plant, No. of seeds/capsule and 1000 seed weight.

Summary in Arabic.

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