Response of Five Varieties of Rice to Nitrogen Fertilization Levels

Abstract

A field experiment was carried out for the 2020 agricultural summer season in Babylon Governorate / Al-Musayyab 45 km north of the governorate with the aim of evaluating the performance of five Varities of rice and the content of these Varities of some active substances by the effect of three levels of nitrogen fertilization (0, 175 and 225 kg/h^-1) The Varities are (Anber 33, Mishkhab 2, Furat, Yasmine and Al Aswad) which were obtained from the rice research station in Mishkhab using a factorial experiment with randomized complete block design (R.C.B.D) with three replicates.The results can be summarized as follows:- Varities differed significantly at the 5% probability level for all studied traits., The Anber 33 varities was significantly superior in most of the traits, while the black varities was superior in the amount of active substances.,The third level of fertilization (225 kg/h^-1) was superior to most of the studied growth and yield traits.  While the second level of fertilization exceeded the content of the Varities of effective medicinal structures., The superiority of the black variety in the content of the rice plant from the active substances in all the effective medicinal structures