Response of rice cultivar IR-28 to nitrogen levels, hill spacings and their interactions [Egypt]
1988
El-Kalla, S.E. (Mansoura Univ. (Egypt). Faculty of Agriculture) | El-Kassaby, A.T. | Kandil, A.A. | Attia, A.N. | El-Sayed, I.O.
Two field experiments were carried out at the Experimental Farm, Fac. of Agric., Mansoura Univ., during 1985 and 1986 seasons to study the effect of three nitrogen levels and five hill spacings as well as their interactions. Plant height, flag blade area, number of panicles/m2, panicle length, number of grains per panicle panicle weight, 100-grain weight, grain and straw yields ton/fad as well as grain protein content showed a high response to the applied nitrogen up to 75 kg/fad. Increasing spacing between hills significantly increased flag blade area, number of panicles/m2, panicle length, number of grains per panicle, panicle, weight, 100-grain weight and grain protein content. While, closest spacing (i.e. 10 x 10 cm between hills) recorded the tallest plants and the highest grain and straw yields (ton/fad.). The interaction between nitrogen levels and plant spacings significantly affected the number of panicles/m2 in 1985 season and number of grains/ panicle in both seasons.
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