Evaluation of different levels of nitrogen fertilizer on the performancecomponents of safflower forage in dry conditions

The world is facing uneven spatial shortages of water to meet the needs of agriculture and the environment, uneven distribution of rainfall, population growth and the development of agricultural and industrial activities have made the issue of water shortage for various uses critical in most places. The word "drought" is so transparent that it conveys its main nature without the need for any interpretation, and it expresses the lack of water, dehydration, and the scarcity of water along with other associated features, including environmental warming and soil salinity. The present research was conducted in order to investigate different levels of nitrogen fertilizer on the morphological traits of fodder safflower under dry conditions, in the form of a randomized complete block design with three replications in a field located in Kermanshah province, Firozabad district, in the crop year of ۱۴۰۲-۱۴۰۳. The studied factors included ۴ levels of nitrogen fertilizer (۵۰, ۷۵, ۱۰۰, control) kg/ha. The results showed that the fresh weight of a single plant, dry weight of a single plant, the number of sub-branches and biological performance were affected by different levels of nitrogen fertilizer treatment. So that the highest fresh weight of a single plant (۶۹.۳۳ and ۶۵ grams per single plant), respectively, was related to the consumption of ۷۵ and ۱۰۰ kg per hectare of nitrogen, and the lowest fresh weight of a single plant (۵۰.۶۶ grams per single plant) was related to the control treatment. Also, the dry weight of a single plant was the highest dry weight of a single plant, respectively (۱۵, ۱۴, ۱۳ grams per square meter) related to the treatment of ۱۰۰, ۵۰, ۷۵ kilograms per hectare of nitrogen consumption, and the lowest control (no use of nitrogen fertilizer) was ۹.۳۳ grams per hectare. square meter) showed. And the number of sub-branches, the highest number of sub-branches (۱۵ sub-branches) related to the treatment of ۱۰۰ kg of nitrogen consumption was obtained, which had a significant difference compared to the control (no use of nitrogen fertilizer) (۹.۳۳ sub-branches). The highest biological yield (۲۸۸۰.۳۳ grams per square meter) related to the treatment of ۱۰۰ kg per hectare of nitrogen consumption was obtained, which was superior to the control (no use of nitrogen fertilizer) (۲۵۱۶.۶۷ grams per square meter). In general, the use of safflower fodder silage fertilized with nitrogen is recommended compared to unfertilized fodder (control).

کلیدواژه ها:

Fodder safflower ، nitrogen fertilizer ، fodder ، dehydration