اثر تاریخ کاشت و سطوح کود نیتروژن بر عملکرد و کیفیت علوفه کاسنی در شرایط آب وهوایی اهواز

Thanks to its palatability and high digestibility, chicory plays an effective role in increasing domestic animals’ products. In order to study the effect of sowing data and nitrogen fertilizer levels on some characteristics of chichory (Cichorium intybus L.), an experiment has been conducted in a split plot design, using randomized complete blocks design with three replications at the Agricultural Sciences and Natural Resources University of Khuzestan in ۲۰۱۶-۲۰۱۷. The factors include four sowing data (۲۲ October, ۵ November, ۲۱ November, and ۵ December) as the main plots and four levels of nitrogen (zero (non-application), ۷۵, ۱۵۰, and ۲۲۵ kg / ha) as subplots. Results show that the sowing dates have only affected chlorophyll meter index, dry matter digestibility, and digestible energy, whereas nitrogen has had a significant effect on all studied traits. Increasing the application of nitrogen to ۲۲۵ kg / ha increases plant height, chlorophyll meter index, leaf area, and branch number, not to mention both fresh and dry weights of the plant. The treatment of ۲۲۵ kg / ha nitrogen raises the fresh weight of shoots and the percentage of forage protein by ۶۶.۳۵% and ۶.۴۴%, respectively, compared to non-application. But in these two traits, no significant difference has been observed among nitrogen application levels in different planting dates.  In this study, late planting date led to better conditions for most physiological, morphological yield, and quality characteristics. Accordingly, it is turned out that October ۲۲ till November ۵ sowing date with ۱۵۰ kg ha-۱ fertilizer has been the best treatment for chicory cultivation in Ahvaz.

کلیدواژه ها:

انرژی قابل هضم ، شاخص سطح برگ ، کلروفیل ، قابلیت هضم ماده خشک ، وزن خشک اندام هوایی